TY  - CONF
AU  - Petrović, Đorđe Ž.
AU  - Stanković, Katarina
AU  - Kumrić, Ksenija
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12079
AB  - The present study investigated potential application of biopolymer chitosan, in the form of gel beads, for the removal of Congo red (CR) dye from aqueous solution. Chitosan hydrogel beads (CHBs) were prepared by a coupled ionic and covalent co-cross-linking, employing citric acid (CA) and glutaraldehyde (Glu) as an ionic and a chemical crosslinker, respectively. Batch experiments were carried out to optimize the process conditions for efficient removal of CR dye and to determine the adsorption capacity of prepared CHBs. The results showed that the highest removal efficiency of CR was obtained in the pH range from 6 to 10, and that the equilibrium was attained after 180 min. The Langmuir isotherm model provided the best correlation for the adsorption of CR onto CA/Glu cocross-linked CHBs, with the maximum adsorption capacity (qm) of 544.2 mg g-1 .
AB  - Istraživanja u okviru ove studije okrenuta su ka ispitivanju mogućnosti primene hidrogelova hitozana, u obliku sfera, za uklanjanje boje kongo crveno (CR) iz vodenih rastvora. Sfere hidrogela hitozana (CHBs) pripremljene su spregnutim jonskim i kovalentnim umrežavanjem, pri čemu su limunska kiselina (CA) i glutaraldehid (Glu) korišćeni kao jonski i kovalentni umreživač, respektivno. Eksperimenti su rađeni u šaržnom sistemu kako bi se optimizovali uslovi za efikasno uklanjanje CR iz vode i odredili adsorpcioni kapaciteti sintetisanih CHBs. Eksperimentalni rezultati su pokazali da je efikasnost uklanjanja CR najveća u pH intervalu od 6 do 10, a da se ravnoteža uspostavlja nakon 180 minuta. Langmirova izoterma pokazala je najbolju korelaciju za adsorpciju CR boje na CA/Glu umreženim sferama hidrogelova hitozana, pri čemu maksimalni adsorpcioni kapacitet (qm) iznosi 544.2 mg g-1 .
PB  - Belgrade : Serbian Chemical Society
C3  - 59th Meeting of the Serbian Chemical Society : Book of Abstracts, Proceedings
T1  - Adsorption characteristics of chitosan hydrogel beads toward removal of Congo red dye from aqueous solutions
T1  - Adsorpcione karakteristike hidrogelova hitozana za uklanjanje boje kongo crveno iz vodenih rastvora
SP  - 164
EP  - 167
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12079
ER  - 

@conference{
author = "Petrović, Đorđe Ž. and Stanković, Katarina and Kumrić, Ksenija",
year = "2023",
abstract = "The present study investigated potential application of biopolymer chitosan, in the form of gel beads, for the removal of Congo red (CR) dye from aqueous solution. Chitosan hydrogel beads (CHBs) were prepared by a coupled ionic and covalent co-cross-linking, employing citric acid (CA) and glutaraldehyde (Glu) as an ionic and a chemical crosslinker, respectively. Batch experiments were carried out to optimize the process conditions for efficient removal of CR dye and to determine the adsorption capacity of prepared CHBs. The results showed that the highest removal efficiency of CR was obtained in the pH range from 6 to 10, and that the equilibrium was attained after 180 min. The Langmuir isotherm model provided the best correlation for the adsorption of CR onto CA/Glu cocross-linked CHBs, with the maximum adsorption capacity (qm) of 544.2 mg g-1 ., Istraživanja u okviru ove studije okrenuta su ka ispitivanju mogućnosti primene hidrogelova hitozana, u obliku sfera, za uklanjanje boje kongo crveno (CR) iz vodenih rastvora. Sfere hidrogela hitozana (CHBs) pripremljene su spregnutim jonskim i kovalentnim umrežavanjem, pri čemu su limunska kiselina (CA) i glutaraldehid (Glu) korišćeni kao jonski i kovalentni umreživač, respektivno. Eksperimenti su rađeni u šaržnom sistemu kako bi se optimizovali uslovi za efikasno uklanjanje CR iz vode i odredili adsorpcioni kapaciteti sintetisanih CHBs. Eksperimentalni rezultati su pokazali da je efikasnost uklanjanja CR najveća u pH intervalu od 6 do 10, a da se ravnoteža uspostavlja nakon 180 minuta. Langmirova izoterma pokazala je najbolju korelaciju za adsorpciju CR boje na CA/Glu umreženim sferama hidrogelova hitozana, pri čemu maksimalni adsorpcioni kapacitet (qm) iznosi 544.2 mg g-1 .",
publisher = "Belgrade : Serbian Chemical Society",
journal = "59th Meeting of the Serbian Chemical Society : Book of Abstracts, Proceedings",
title = "Adsorption characteristics of chitosan hydrogel beads toward removal of Congo red dye from aqueous solutions, Adsorpcione karakteristike hidrogelova hitozana za uklanjanje boje kongo crveno iz vodenih rastvora",
pages = "164-167",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12079"
}

Petrović, Đ. Ž., Stanković, K.,& Kumrić, K.. (2023). Adsorption characteristics of chitosan hydrogel beads toward removal of Congo red dye from aqueous solutions. in 59th Meeting of the Serbian Chemical Society : Book of Abstracts, Proceedings
Belgrade : Serbian Chemical Society., 164-167.
https://hdl.handle.net/21.15107/rcub_vinar_12079

Petrović ĐŽ, Stanković K, Kumrić K. Adsorption characteristics of chitosan hydrogel beads toward removal of Congo red dye from aqueous solutions. in 59th Meeting of the Serbian Chemical Society : Book of Abstracts, Proceedings. 2023;:164-167.
https://hdl.handle.net/21.15107/rcub_vinar_12079 .

Petrović, Đorđe Ž., Stanković, Katarina, Kumrić, Ksenija, "Adsorption characteristics of chitosan hydrogel beads toward removal of Congo red dye from aqueous solutions" in 59th Meeting of the Serbian Chemical Society : Book of Abstracts, Proceedings (2023):164-167,
https://hdl.handle.net/21.15107/rcub_vinar_12079 .

TY  - CONF
AU  - Petrović, Đorđe Ž.
AU  - Stanković, Katarina
AU  - Slavković Beškoski, Latinka
AU  - Kumrić, Ksenija
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12082
AB  - Mine waters and tailings resulting from mining and mineral processing often have a harmful effect on the local environment. Copper has a strong biocidal activity that greatly affects ecosystems. Therefore, the removal of copper from wastewater is of great importance to the environment. Chitosan, a natural biopolymer, obtained from chitin, the most abundant natural fiber, often has better properties than much more expensive synthetic polymers. This paper investigates the application of chitosan-based sorbents for removing copper from aqueous solutions. A novel adsorbent, chitosan hydrogel beads (CHBs), was synthesized from chitosan flakes (medium molecular weight), via ionic/covalent cross-linking. Batch experiments were carried out to optimize the process conditions for efficient removal of Cu(II) and to determine the adsorption capacity of prepared CHBs. The results showed that the maximum Cu(II) adsorption capacity estimated with Langmuir isotherm modeling was 103.6 mg/g which was three times higher than chitosan flakes (33.7 mg/g).
PB  - University of Belgrade : Technical Faculty in Bor
C3  - IOC 2023 : 54th International October Conference on Mining and Metallurgy : Proceedings book
T1  - Removal of Cu(II) from aqueous solutions using adsorbent based on chitosan hydrogel beads
SP  - 175
EP  - 178
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12082
ER  - 

@conference{
author = "Petrović, Đorđe Ž. and Stanković, Katarina and Slavković Beškoski, Latinka and Kumrić, Ksenija",
year = "2023",
abstract = "Mine waters and tailings resulting from mining and mineral processing often have a harmful effect on the local environment. Copper has a strong biocidal activity that greatly affects ecosystems. Therefore, the removal of copper from wastewater is of great importance to the environment. Chitosan, a natural biopolymer, obtained from chitin, the most abundant natural fiber, often has better properties than much more expensive synthetic polymers. This paper investigates the application of chitosan-based sorbents for removing copper from aqueous solutions. A novel adsorbent, chitosan hydrogel beads (CHBs), was synthesized from chitosan flakes (medium molecular weight), via ionic/covalent cross-linking. Batch experiments were carried out to optimize the process conditions for efficient removal of Cu(II) and to determine the adsorption capacity of prepared CHBs. The results showed that the maximum Cu(II) adsorption capacity estimated with Langmuir isotherm modeling was 103.6 mg/g which was three times higher than chitosan flakes (33.7 mg/g).",
publisher = "University of Belgrade : Technical Faculty in Bor",
journal = "IOC 2023 : 54th International October Conference on Mining and Metallurgy : Proceedings book",
title = "Removal of Cu(II) from aqueous solutions using adsorbent based on chitosan hydrogel beads",
pages = "175-178",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12082"
}

Petrović, Đ. Ž., Stanković, K., Slavković Beškoski, L.,& Kumrić, K.. (2023). Removal of Cu(II) from aqueous solutions using adsorbent based on chitosan hydrogel beads. in IOC 2023 : 54th International October Conference on Mining and Metallurgy : Proceedings book
University of Belgrade : Technical Faculty in Bor., 175-178.
https://hdl.handle.net/21.15107/rcub_vinar_12082

Petrović ĐŽ, Stanković K, Slavković Beškoski L, Kumrić K. Removal of Cu(II) from aqueous solutions using adsorbent based on chitosan hydrogel beads. in IOC 2023 : 54th International October Conference on Mining and Metallurgy : Proceedings book. 2023;:175-178.
https://hdl.handle.net/21.15107/rcub_vinar_12082 .

Petrović, Đorđe Ž., Stanković, Katarina, Slavković Beškoski, Latinka, Kumrić, Ksenija, "Removal of Cu(II) from aqueous solutions using adsorbent based on chitosan hydrogel beads" in IOC 2023 : 54th International October Conference on Mining and Metallurgy : Proceedings book (2023):175-178,
https://hdl.handle.net/21.15107/rcub_vinar_12082 .

TY  - CONF
AU  - Egerić, Marija
AU  - Devečerski, Aleksandar
AU  - Matović, Ljiljana
AU  - Kumrić, Ksenija
AU  - Petrović, Đorđe Ž.
AU  - Vujasin, Radojka
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12085
AB  - Rapid growth of human population has led to increased water demand by various industries and production of large amount of wastewater. Textile, leather, paper, and plastics industries wastewater, which contains organic pollutants such as dyes, needs a proper treatment in order to be safely discharged into the environment, therefore, new methods are being developed. This research is based on investigation of photocatalytic degradation of an azo-type dye Congo Red (CR) by using powdered UiO-66 type MOF (Metal Organic Framework), activated carbon (AC) and their composite powder mixtures made with different MOF/AC ratios. Additionally, this research includes investigation of renewability of these materials in several experimental cycles. Experiments were performed in batch conditions, samples were exposed to solar light irradiation, then centrifuged to remove solid particles and in order to determine the concentration of the remaining dye, solutions were analyzed by UV-ViS spectrophotometer. Renewability of the photocatalysts used in experiments was investigated by repeating this process three times, with catalysts dried at 50 °C between cycles. Results have shown that pure MOF has excellent and almost identical photocatalytical efficiency in every cycle, compared to all MOF/AC composites and pure AC, probably due to the saturation of available adsorption sites in AC. CR removal efficiency and renewability of various composites depends on MOF/AC ratio, therefore, the most efficient composites are the ones where MOF content varies from 25 wt. % up to 100 wt. %. Samples with MOF content 50 - 100 wt. % have shown excellent renewability, while composites where AC is more dominant (95 - 100 wt. %) have shown almost none. Among the composites examined in this paper, the one with MOF/AC ratio of 50/50 has shown the best cost/performance ratio in removal of Congo red dye from aqueous solution.
PB  - Portugal : University of Aveiro
C3  - YCN 2023 : Young Ceramists Network Workshop : Book of Abstracts
T1  - Assessment of optimum ratio of Metal Organic Framework and activated carbon in composites for photocatalytic removal of Congo Red dye
SP  - 34
EP  - 34
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12085
ER  - 

@conference{
author = "Egerić, Marija and Devečerski, Aleksandar and Matović, Ljiljana and Kumrić, Ksenija and Petrović, Đorđe Ž. and Vujasin, Radojka",
year = "2023",
abstract = "Rapid growth of human population has led to increased water demand by various industries and production of large amount of wastewater. Textile, leather, paper, and plastics industries wastewater, which contains organic pollutants such as dyes, needs a proper treatment in order to be safely discharged into the environment, therefore, new methods are being developed. This research is based on investigation of photocatalytic degradation of an azo-type dye Congo Red (CR) by using powdered UiO-66 type MOF (Metal Organic Framework), activated carbon (AC) and their composite powder mixtures made with different MOF/AC ratios. Additionally, this research includes investigation of renewability of these materials in several experimental cycles. Experiments were performed in batch conditions, samples were exposed to solar light irradiation, then centrifuged to remove solid particles and in order to determine the concentration of the remaining dye, solutions were analyzed by UV-ViS spectrophotometer. Renewability of the photocatalysts used in experiments was investigated by repeating this process three times, with catalysts dried at 50 °C between cycles. Results have shown that pure MOF has excellent and almost identical photocatalytical efficiency in every cycle, compared to all MOF/AC composites and pure AC, probably due to the saturation of available adsorption sites in AC. CR removal efficiency and renewability of various composites depends on MOF/AC ratio, therefore, the most efficient composites are the ones where MOF content varies from 25 wt. % up to 100 wt. %. Samples with MOF content 50 - 100 wt. % have shown excellent renewability, while composites where AC is more dominant (95 - 100 wt. %) have shown almost none. Among the composites examined in this paper, the one with MOF/AC ratio of 50/50 has shown the best cost/performance ratio in removal of Congo red dye from aqueous solution.",
publisher = "Portugal : University of Aveiro",
journal = "YCN 2023 : Young Ceramists Network Workshop : Book of Abstracts",
title = "Assessment of optimum ratio of Metal Organic Framework and activated carbon in composites for photocatalytic removal of Congo Red dye",
pages = "34-34",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12085"
}

Egerić, M., Devečerski, A., Matović, L., Kumrić, K., Petrović, Đ. Ž.,& Vujasin, R.. (2023). Assessment of optimum ratio of Metal Organic Framework and activated carbon in composites for photocatalytic removal of Congo Red dye. in YCN 2023 : Young Ceramists Network Workshop : Book of Abstracts
Portugal : University of Aveiro., 34-34.
https://hdl.handle.net/21.15107/rcub_vinar_12085

Egerić M, Devečerski A, Matović L, Kumrić K, Petrović ĐŽ, Vujasin R. Assessment of optimum ratio of Metal Organic Framework and activated carbon in composites for photocatalytic removal of Congo Red dye. in YCN 2023 : Young Ceramists Network Workshop : Book of Abstracts. 2023;:34-34.
https://hdl.handle.net/21.15107/rcub_vinar_12085 .

Egerić, Marija, Devečerski, Aleksandar, Matović, Ljiljana, Kumrić, Ksenija, Petrović, Đorđe Ž., Vujasin, Radojka, "Assessment of optimum ratio of Metal Organic Framework and activated carbon in composites for photocatalytic removal of Congo Red dye" in YCN 2023 : Young Ceramists Network Workshop : Book of Abstracts (2023):34-34,
https://hdl.handle.net/21.15107/rcub_vinar_12085 .

TY  - JOUR
AU  - Petrović, Đorđe
AU  - Matović, Ljiljana
AU  - Egerić, Marija
AU  - Omerašević, Mia
AU  - Vujasin, Radojka
AU  - Ilić-Stojanović, Snežana
AU  - Krstić, Sanja
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11730
AB  - Technetium-99 (99Tc), as one of the important high-yield fission products, is a significant threat to the environment and human health. It is produced in large amounts by nuclear fission of 235U or 239Pu in nuclear reactions, though the quantity of Tc produced by the spontaneous fission of 238U or by decay of 99Mo in the nature which is very small. 99Tc in the environment originates from nuclear weapons tests, discharges from nuclear power plants, nuclear medicine and radiobiology. These activities generate large volumes of low and intermediate radioactive waste which can cause a significant impact on the environment if disposed without suitable treatment. Immobilization of 99Tc into a relatively small volume waste is vital for long term permanent disposal. High mobility and long half-life of 99Tc considered to be one of the most important radionuclides in safety assessment of environmental radioactivity as well as nuclear waste management. Effective removal of radioactive technetium (99Tc) from contaminated water is of enormous importance from an environmental and public health perspective, yet many current methodologies are highly ineffective. This paper summarizes physico-chemical separation procedures emphasizing those that are the most used in practice. Classic sorbents such as activated carbons, ion exchange resins as well, as new materials, such as metal−organic frameworks and graphene based membranes are described in the paper.
T2  - Journal of Innovative Materials in Extreme Conditions
T1  - The Origin of 99Tc in the Environment and Its Removal
VL  - 4
IS  - 1
SP  - 10
EP  - 21
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11730
ER  - 

@article{
author = "Petrović, Đorđe and Matović, Ljiljana and Egerić, Marija and Omerašević, Mia and Vujasin, Radojka and Ilić-Stojanović, Snežana and Krstić, Sanja",
year = "2023",
abstract = "Technetium-99 (99Tc), as one of the important high-yield fission products, is a significant threat to the environment and human health. It is produced in large amounts by nuclear fission of 235U or 239Pu in nuclear reactions, though the quantity of Tc produced by the spontaneous fission of 238U or by decay of 99Mo in the nature which is very small. 99Tc in the environment originates from nuclear weapons tests, discharges from nuclear power plants, nuclear medicine and radiobiology. These activities generate large volumes of low and intermediate radioactive waste which can cause a significant impact on the environment if disposed without suitable treatment. Immobilization of 99Tc into a relatively small volume waste is vital for long term permanent disposal. High mobility and long half-life of 99Tc considered to be one of the most important radionuclides in safety assessment of environmental radioactivity as well as nuclear waste management. Effective removal of radioactive technetium (99Tc) from contaminated water is of enormous importance from an environmental and public health perspective, yet many current methodologies are highly ineffective. This paper summarizes physico-chemical separation procedures emphasizing those that are the most used in practice. Classic sorbents such as activated carbons, ion exchange resins as well, as new materials, such as metal−organic frameworks and graphene based membranes are described in the paper.",
journal = "Journal of Innovative Materials in Extreme Conditions",
title = "The Origin of 99Tc in the Environment and Its Removal",
volume = "4",
number = "1",
pages = "10-21",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11730"
}

Petrović, Đ., Matović, L., Egerić, M., Omerašević, M., Vujasin, R., Ilić-Stojanović, S.,& Krstić, S.. (2023). The Origin of 99Tc in the Environment and Its Removal. in Journal of Innovative Materials in Extreme Conditions, 4(1), 10-21.
https://hdl.handle.net/21.15107/rcub_vinar_11730

Petrović Đ, Matović L, Egerić M, Omerašević M, Vujasin R, Ilić-Stojanović S, Krstić S. The Origin of 99Tc in the Environment and Its Removal. in Journal of Innovative Materials in Extreme Conditions. 2023;4(1):10-21.
https://hdl.handle.net/21.15107/rcub_vinar_11730 .

Petrović, Đorđe, Matović, Ljiljana, Egerić, Marija, Omerašević, Mia, Vujasin, Radojka, Ilić-Stojanović, Snežana, Krstić, Sanja, "The Origin of 99Tc in the Environment and Its Removal" in Journal of Innovative Materials in Extreme Conditions, 4, no. 1 (2023):10-21,
https://hdl.handle.net/21.15107/rcub_vinar_11730 .

TY  - CONF
AU  - Vujasin, Radojka
AU  - Kumrić, Ksenija
AU  - Devečerski, Aleksandar
AU  - Omerašević, Mia
AU  - Egerić, Marija
AU  - Petrović, Đorđe Ž.
AU  - Matović, Ljiljana
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12083
AB  - Dyes and pigments are used by many industries to color their products. In this study, we applied two different kinds of waste materials: used radioactive sources and carbon waste tire char (WTC) to study their simultaneous effect of irradiation/adsorption on dye degradation. Irradiation of methylene blue (MB) by high energy γ radiation derived from used radioactive sources in the presence of carbon based material made of waste tire granules caused enhanced decoloration of the MB. Delivered dose of  radiations differ depending on the type of isotope. The best decoloration was achieved using 60Co isotope. Complete decoloration of 20 ml of MB solution having concentration of 100 mg dm-3 of WTC was achieved with delivered doze of only 60 Gy. Decoloration of 90% was achieved after only 20 min while complete decoloration of MB solution (100%) was obtained in the irradiated samples after only 100 min. Processes that use ionizing radiation (α, β and γ) for decoloration of dyes are characterized as advanced oxidation processes which normally utilize a strong oxidizing species to break down the macromolecules. High energy radiation in water medium can produce radiolysis of water i.e. formation of several active species such as H2, H2O2, H+, OH− , eaq− , •OH and •H which are responsible for chemical reactions in water solutions. The significance of this approach is, except using waste materials for achieving enhanced degradation of organic pollutants in the solution, avoiding the need for safe disposal and storage of waste radioactive sources. Also, less waste material is generated at the end of the simultaneous irradiation/sorption process compared to the pure sorption process. Surface composition of WTC, needed to elucidate the key mechanism of synergism of MB degradation, during the simultaneous adsorption/irradiation was obtained using FTIR and XPS technique. OH-  ions, that originate from radiolysis of water induced by gamma irradiation and from the surface of WTC, play the crucial role in degradation of MB. MB molecule adsorbed at the surface of WTC is electronically reorganized and as a consequence degradated via the opening of the central aromatic ring containing both heteroatoms, S and N. OH-  ions produced by water radiolysis also cause degradation of MB molecules in the solution.The synergetic effect is a result of the attack of • OH radicals on electrostatic reorganized MB molecule adsorbed on surface of carbon material. Opening of central aromatic ring of MB firstly appeared in cleavage of the double C-S+ =C bond and then cleavage of double N=C bond.
PB  - Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade
PB  - Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)
C3  - IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts
T1  - Water under extreme conditions: simultaneous gamma irradiation/carbon char adsorption resulted in improved methylene blue degradation
SP  - 56
EP  - 56
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12083
ER  - 

@conference{
author = "Vujasin, Radojka and Kumrić, Ksenija and Devečerski, Aleksandar and Omerašević, Mia and Egerić, Marija and Petrović, Đorđe Ž. and Matović, Ljiljana",
year = "2022",
abstract = "Dyes and pigments are used by many industries to color their products. In this study, we applied two different kinds of waste materials: used radioactive sources and carbon waste tire char (WTC) to study their simultaneous effect of irradiation/adsorption on dye degradation. Irradiation of methylene blue (MB) by high energy γ radiation derived from used radioactive sources in the presence of carbon based material made of waste tire granules caused enhanced decoloration of the MB. Delivered dose of  radiations differ depending on the type of isotope. The best decoloration was achieved using 60Co isotope. Complete decoloration of 20 ml of MB solution having concentration of 100 mg dm-3 of WTC was achieved with delivered doze of only 60 Gy. Decoloration of 90% was achieved after only 20 min while complete decoloration of MB solution (100%) was obtained in the irradiated samples after only 100 min. Processes that use ionizing radiation (α, β and γ) for decoloration of dyes are characterized as advanced oxidation processes which normally utilize a strong oxidizing species to break down the macromolecules. High energy radiation in water medium can produce radiolysis of water i.e. formation of several active species such as H2, H2O2, H+, OH− , eaq− , •OH and •H which are responsible for chemical reactions in water solutions. The significance of this approach is, except using waste materials for achieving enhanced degradation of organic pollutants in the solution, avoiding the need for safe disposal and storage of waste radioactive sources. Also, less waste material is generated at the end of the simultaneous irradiation/sorption process compared to the pure sorption process. Surface composition of WTC, needed to elucidate the key mechanism of synergism of MB degradation, during the simultaneous adsorption/irradiation was obtained using FTIR and XPS technique. OH-  ions, that originate from radiolysis of water induced by gamma irradiation and from the surface of WTC, play the crucial role in degradation of MB. MB molecule adsorbed at the surface of WTC is electronically reorganized and as a consequence degradated via the opening of the central aromatic ring containing both heteroatoms, S and N. OH-  ions produced by water radiolysis also cause degradation of MB molecules in the solution.The synergetic effect is a result of the attack of • OH radicals on electrostatic reorganized MB molecule adsorbed on surface of carbon material. Opening of central aromatic ring of MB firstly appeared in cleavage of the double C-S+ =C bond and then cleavage of double N=C bond.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)",
journal = "IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts",
title = "Water under extreme conditions: simultaneous gamma irradiation/carbon char adsorption resulted in improved methylene blue degradation",
pages = "56-56",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12083"
}

Vujasin, R., Kumrić, K., Devečerski, A., Omerašević, M., Egerić, M., Petrović, Đ. Ž.,& Matović, L.. (2022). Water under extreme conditions: simultaneous gamma irradiation/carbon char adsorption resulted in improved methylene blue degradation. in IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts
Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade., 56-56.
https://hdl.handle.net/21.15107/rcub_vinar_12083

Vujasin R, Kumrić K, Devečerski A, Omerašević M, Egerić M, Petrović ĐŽ, Matović L. Water under extreme conditions: simultaneous gamma irradiation/carbon char adsorption resulted in improved methylene blue degradation. in IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts. 2022;:56-56.
https://hdl.handle.net/21.15107/rcub_vinar_12083 .

Vujasin, Radojka, Kumrić, Ksenija, Devečerski, Aleksandar, Omerašević, Mia, Egerić, Marija, Petrović, Đorđe Ž., Matović, Ljiljana, "Water under extreme conditions: simultaneous gamma irradiation/carbon char adsorption resulted in improved methylene blue degradation" in IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts (2022):56-56,
https://hdl.handle.net/21.15107/rcub_vinar_12083 .

TY  - CONF
AU  - Egerić, Marija
AU  - Kumrić, Ksenija
AU  - Vujasin, Radojka
AU  - Devečerski, Aleksandar
AU  - Krstić, Sanja
AU  - Matović, Ljiljana
AU  - Petrović, Đorđe Ž.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12084
AB  - Rapid industrialization and increasing population have increased the water demand. Various wastes from industries and anthropogenic activities are discharged into aquatic bodies such as lakes, ponds, rivers, oceans. Therefore, focus is placed on the removal of the contamination from the wastewater. Organic pollutants gained extensive attention because of their toxicity, persistence and significant impacts on human health Among them, organic dyes are complex molecules and most of them are water-soluble, resistant to detergents and heat, exhibit poor biodegradability, etc. Azo dyes are used in about 70% of commercial dyes today, from textile and plastic to cosmetics and food. In this work, removal of azo-type dye Congo Red (CR) from water was performed by using UiO-66 type MOF (Metal Organic Framework), activated carbon (AC) and their composite powder mixture (MOF/AC = 50/50 wt.%). Samples were exposed to solar light irradiation for 1h and 2.5 h, respectively, centrifuged to remove solid particles, and solutions were analyzed by UV-ViS spectrophotometer in order to determine the concentration of the remaining dye. Process was repeated three times in order to explore the renewability of the photocatalysts used, with catalysts dried at 50 °C between cycles. Results revieled superior photocatalytic cycling performance of the MOF compared to the MOF/AC composite, while AC showed decline in dye removal performance due to the saturation of available adsorption sites. MOF/AC composite exhibited beneficial cost/performance ratio.
PB  - University of Belgrade : Institute for Multidisciplinary Research
C3  - 6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade
T1  - Enhanced photocatalytic removal of Congo red by MOF-activated carbon composite
SP  - 58
EP  - 58
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12084
ER  - 

@conference{
author = "Egerić, Marija and Kumrić, Ksenija and Vujasin, Radojka and Devečerski, Aleksandar and Krstić, Sanja and Matović, Ljiljana and Petrović, Đorđe Ž.",
year = "2022",
abstract = "Rapid industrialization and increasing population have increased the water demand. Various wastes from industries and anthropogenic activities are discharged into aquatic bodies such as lakes, ponds, rivers, oceans. Therefore, focus is placed on the removal of the contamination from the wastewater. Organic pollutants gained extensive attention because of their toxicity, persistence and significant impacts on human health Among them, organic dyes are complex molecules and most of them are water-soluble, resistant to detergents and heat, exhibit poor biodegradability, etc. Azo dyes are used in about 70% of commercial dyes today, from textile and plastic to cosmetics and food. In this work, removal of azo-type dye Congo Red (CR) from water was performed by using UiO-66 type MOF (Metal Organic Framework), activated carbon (AC) and their composite powder mixture (MOF/AC = 50/50 wt.%). Samples were exposed to solar light irradiation for 1h and 2.5 h, respectively, centrifuged to remove solid particles, and solutions were analyzed by UV-ViS spectrophotometer in order to determine the concentration of the remaining dye. Process was repeated three times in order to explore the renewability of the photocatalysts used, with catalysts dried at 50 °C between cycles. Results revieled superior photocatalytic cycling performance of the MOF compared to the MOF/AC composite, while AC showed decline in dye removal performance due to the saturation of available adsorption sites. MOF/AC composite exhibited beneficial cost/performance ratio.",
publisher = "University of Belgrade : Institute for Multidisciplinary Research",
journal = "6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade",
title = "Enhanced photocatalytic removal of Congo red by MOF-activated carbon composite",
pages = "58-58",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12084"
}

Egerić, M., Kumrić, K., Vujasin, R., Devečerski, A., Krstić, S., Matović, L.,& Petrović, Đ. Ž.. (2022). Enhanced photocatalytic removal of Congo red by MOF-activated carbon composite. in 6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade
University of Belgrade : Institute for Multidisciplinary Research., 58-58.
https://hdl.handle.net/21.15107/rcub_vinar_12084

Egerić M, Kumrić K, Vujasin R, Devečerski A, Krstić S, Matović L, Petrović ĐŽ. Enhanced photocatalytic removal of Congo red by MOF-activated carbon composite. in 6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade. 2022;:58-58.
https://hdl.handle.net/21.15107/rcub_vinar_12084 .

Egerić, Marija, Kumrić, Ksenija, Vujasin, Radojka, Devečerski, Aleksandar, Krstić, Sanja, Matović, Ljiljana, Petrović, Đorđe Ž., "Enhanced photocatalytic removal of Congo red by MOF-activated carbon composite" in 6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade (2022):58-58,
https://hdl.handle.net/21.15107/rcub_vinar_12084 .

TY  - CONF
AU  - Nikolić, Ljubiša
AU  - Najman, Stevo
AU  - Petrović, Đorđe
AU  - Urošević, Maja
AU  - Nikolić, Vesna
AU  - Cakić, Suzana
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11667
AB  - Poly(N-isopropylmethacrylamide) has significant potential for designing thermosensitive new materials. It is similar with well-known poly(N-isopropylacrylamide) hydrogels. The influence of the α-methylation on the each monomer unit in the main chain exhibits weaker intermolecular interactions between the amide group. The method of thermally-initiated free radical polymerization was applied to synthesize a series of poly(N-isopropylmethacrylamide) hydrogels with different cross-linker amount. The micrographs, obtained by the scanning electron microscopy method, indicated a semi-homogeneous crosslinked network of these hydrogels which can be classified as macroporous. The swelling behavior at room temperature of these negatively thermosensitive hydrogel exhibit a little higher swelling degree in acidic media (at pH 2.0 swelling degree was about 21) in relation to the weakly basic media (at pH 7.4 swelling degree was about 18). The poly(N-isopropylmethacrylamide) hydrogel topology showed much free space within the crosslinked polymer chains in the swollen state and they could be use as absorbers of water, diluents, dissolvent, solutions, or as carriers for active substances.
PB  - University in Banjaluka : Faculty of Technology
C3  - 14th Conference of chemists, technologists and environmentalists of Republic of Srpska : the book of abstracts; Oct 21-22, Banja Luka, Republic of Srpska
T1  - The influence of poly(N-isopropylmethacrylamide) hydrogels crosslinking on their swelling capacity
SP  - 71
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11667
ER  - 

@conference{
author = "Nikolić, Ljubiša and Najman, Stevo and Petrović, Đorđe and Urošević, Maja and Nikolić, Vesna and Cakić, Suzana",
year = "2022",
abstract = "Poly(N-isopropylmethacrylamide) has significant potential for designing thermosensitive new materials. It is similar with well-known poly(N-isopropylacrylamide) hydrogels. The influence of the α-methylation on the each monomer unit in the main chain exhibits weaker intermolecular interactions between the amide group. The method of thermally-initiated free radical polymerization was applied to synthesize a series of poly(N-isopropylmethacrylamide) hydrogels with different cross-linker amount. The micrographs, obtained by the scanning electron microscopy method, indicated a semi-homogeneous crosslinked network of these hydrogels which can be classified as macroporous. The swelling behavior at room temperature of these negatively thermosensitive hydrogel exhibit a little higher swelling degree in acidic media (at pH 2.0 swelling degree was about 21) in relation to the weakly basic media (at pH 7.4 swelling degree was about 18). The poly(N-isopropylmethacrylamide) hydrogel topology showed much free space within the crosslinked polymer chains in the swollen state and they could be use as absorbers of water, diluents, dissolvent, solutions, or as carriers for active substances.",
publisher = "University in Banjaluka : Faculty of Technology",
journal = "14th Conference of chemists, technologists and environmentalists of Republic of Srpska : the book of abstracts; Oct 21-22, Banja Luka, Republic of Srpska",
title = "The influence of poly(N-isopropylmethacrylamide) hydrogels crosslinking on their swelling capacity",
pages = "71",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11667"
}

Nikolić, L., Najman, S., Petrović, Đ., Urošević, M., Nikolić, V.,& Cakić, S.. (2022). The influence of poly(N-isopropylmethacrylamide) hydrogels crosslinking on their swelling capacity. in 14th Conference of chemists, technologists and environmentalists of Republic of Srpska : the book of abstracts; Oct 21-22, Banja Luka, Republic of Srpska
University in Banjaluka : Faculty of Technology., 71.
https://hdl.handle.net/21.15107/rcub_vinar_11667

Nikolić L, Najman S, Petrović Đ, Urošević M, Nikolić V, Cakić S. The influence of poly(N-isopropylmethacrylamide) hydrogels crosslinking on their swelling capacity. in 14th Conference of chemists, technologists and environmentalists of Republic of Srpska : the book of abstracts; Oct 21-22, Banja Luka, Republic of Srpska. 2022;:71.
https://hdl.handle.net/21.15107/rcub_vinar_11667 .

Nikolić, Ljubiša, Najman, Stevo, Petrović, Đorđe, Urošević, Maja, Nikolić, Vesna, Cakić, Suzana, "The influence of poly(N-isopropylmethacrylamide) hydrogels crosslinking on their swelling capacity" in 14th Conference of chemists, technologists and environmentalists of Republic of Srpska : the book of abstracts; Oct 21-22, Banja Luka, Republic of Srpska (2022):71,
https://hdl.handle.net/21.15107/rcub_vinar_11667 .

TY  - CONF
AU  - Ilić-Stojanović, Snežana
AU  - Nikolić, Ljubiša
AU  - Petrović, Đorđe
AU  - Stojanović, Jelena
AU  - Urošević, Maja
AU  - Nikolić, Vesna
AU  - Cakić, Suzana
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11668
AB  - Poly(N-isopropylmethacrylamide) homopolymer, which belongs to thermosensitive hydrogels, was synthesized by free radical polymerization method with 1.5 mol% of ethylene glycol dimethacrylate as cross-linker. The structure of obtained homopolymer network was confirmed by Fourier transform infrared spectroscopy analysis. The hydrogel in the gelatinous state was subjected to gamma irradiation in order to additionally form a three-dimensional network in a solid state. Suddenly, the synthesized gelatinous homopolymer was transformed into the liquid state after irradiation instead of expected additional crosslinking. Breakdown of poly(Nisopropylmethacrylamide) homopolymer was confirmed by using different methods: gel permeation chromatography, the static headspace gas chromatography mass spectrometry and gas chromatography/flame ionization detection methods. New compounds, different from the homopolymer, monomer and crosslinker were detected after irradiation. As result, the gamma irradiation will be applicable for the poly(N-isopropylmethacrylamide) homopolymer decomposition and useful to further recyclability analysis.
PB  - University in Banjaluka : Faculty of Technology
C3  - 14th Conference of chemists, technologists and environmentalists of Republic of Srpska : the book of abstracts; Oct 21-22, Banja Luka, Republic of Srpska
T1  - Decomposition of poly(N-isopropylmethacrylamide) homopolymer network
SP  - 72
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11668
ER  - 

@conference{
author = "Ilić-Stojanović, Snežana and Nikolić, Ljubiša and Petrović, Đorđe and Stojanović, Jelena and Urošević, Maja and Nikolić, Vesna and Cakić, Suzana",
year = "2022",
abstract = "Poly(N-isopropylmethacrylamide) homopolymer, which belongs to thermosensitive hydrogels, was synthesized by free radical polymerization method with 1.5 mol% of ethylene glycol dimethacrylate as cross-linker. The structure of obtained homopolymer network was confirmed by Fourier transform infrared spectroscopy analysis. The hydrogel in the gelatinous state was subjected to gamma irradiation in order to additionally form a three-dimensional network in a solid state. Suddenly, the synthesized gelatinous homopolymer was transformed into the liquid state after irradiation instead of expected additional crosslinking. Breakdown of poly(Nisopropylmethacrylamide) homopolymer was confirmed by using different methods: gel permeation chromatography, the static headspace gas chromatography mass spectrometry and gas chromatography/flame ionization detection methods. New compounds, different from the homopolymer, monomer and crosslinker were detected after irradiation. As result, the gamma irradiation will be applicable for the poly(N-isopropylmethacrylamide) homopolymer decomposition and useful to further recyclability analysis.",
publisher = "University in Banjaluka : Faculty of Technology",
journal = "14th Conference of chemists, technologists and environmentalists of Republic of Srpska : the book of abstracts; Oct 21-22, Banja Luka, Republic of Srpska",
title = "Decomposition of poly(N-isopropylmethacrylamide) homopolymer network",
pages = "72",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11668"
}

Ilić-Stojanović, S., Nikolić, L., Petrović, Đ., Stojanović, J., Urošević, M., Nikolić, V.,& Cakić, S.. (2022). Decomposition of poly(N-isopropylmethacrylamide) homopolymer network. in 14th Conference of chemists, technologists and environmentalists of Republic of Srpska : the book of abstracts; Oct 21-22, Banja Luka, Republic of Srpska
University in Banjaluka : Faculty of Technology., 72.
https://hdl.handle.net/21.15107/rcub_vinar_11668

Ilić-Stojanović S, Nikolić L, Petrović Đ, Stojanović J, Urošević M, Nikolić V, Cakić S. Decomposition of poly(N-isopropylmethacrylamide) homopolymer network. in 14th Conference of chemists, technologists and environmentalists of Republic of Srpska : the book of abstracts; Oct 21-22, Banja Luka, Republic of Srpska. 2022;:72.
https://hdl.handle.net/21.15107/rcub_vinar_11668 .

Ilić-Stojanović, Snežana, Nikolić, Ljubiša, Petrović, Đorđe, Stojanović, Jelena, Urošević, Maja, Nikolić, Vesna, Cakić, Suzana, "Decomposition of poly(N-isopropylmethacrylamide) homopolymer network" in 14th Conference of chemists, technologists and environmentalists of Republic of Srpska : the book of abstracts; Oct 21-22, Banja Luka, Republic of Srpska (2022):72,
https://hdl.handle.net/21.15107/rcub_vinar_11668 .

TY  - JOUR
AU  - Zmejkoski, Danica
AU  - Marković, Zoran M.
AU  - Zdravković, Nemanja M.
AU  - Trišić, Dijana
AU  - Budimir, Milica
AU  - Kuzman, Sanja
AU  - Kozyrovska, Natalia O.
AU  - Orlovska, Iryna V.
AU  - Bugárová, Nikol
AU  - Petrović, Đorđe
AU  - Kováčová, Mária
AU  - Kleinová, Angela
AU  - Špitalský, Zdeno
AU  - Pavlović, Vladimir B.
AU  - Todorović-Marković, Biljana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9143
AB  - Therapy of bacterial urinary tract infections (UTIs) and catheter associated urinary tract infections (CAUTIs) is still a great challenge because of the resistance of bacteria to nowadays used antibiotics and encrustation of catheters. Bacterial cellulose (BC) as a biocompatible material with a high porosity allows incorporation of different materials in its three dimensional network structure. In this work a low molecular weight chitosan (Chi) polymer is incorporated in BC with different concentrations. Different characterization techniques are used to investigate structural and optical properties of these composites. Radical scavenging activity test shows moderate antioxidant activity of these biocompatible composites whereasin vitrorelease test shows that 13.3% of chitosan is released after 72 h. Antibacterial testing of BC-Chi composites conducted on Gram-positive and Gram-negative bacteria causing UTIs and CAUTIs (Escherichia coli,Pseudomonas aeruginosa,Klebsiella pneumoniae) and encrustation (Proteus mirabilis) show bactericidal effect. The morphology analysis of bacteria after the application of BC-Chi shows that they are flattened with a rough surface, with a tendency to agglomerate and with decreased length and width. All obtained results show that BC-Chi composites might be considered as potential biomedical agents in treatment of UTIs and CAUTIs and as a urinary catheter coating in encrustation prevention.
T2  - RSC Advances
T1  - Bactericidal and antioxidant bacterial cellulose hydrogels doped with chitosan as potential urinary tract infection biomedical agent
VL  - 11
IS  - 15
SP  - 8559
EP  - 8568
DO  - 10.1039/D0RA10782D
ER  - 

@article{
author = "Zmejkoski, Danica and Marković, Zoran M. and Zdravković, Nemanja M. and Trišić, Dijana and Budimir, Milica and Kuzman, Sanja and Kozyrovska, Natalia O. and Orlovska, Iryna V. and Bugárová, Nikol and Petrović, Đorđe and Kováčová, Mária and Kleinová, Angela and Špitalský, Zdeno and Pavlović, Vladimir B. and Todorović-Marković, Biljana",
year = "2021",
abstract = "Therapy of bacterial urinary tract infections (UTIs) and catheter associated urinary tract infections (CAUTIs) is still a great challenge because of the resistance of bacteria to nowadays used antibiotics and encrustation of catheters. Bacterial cellulose (BC) as a biocompatible material with a high porosity allows incorporation of different materials in its three dimensional network structure. In this work a low molecular weight chitosan (Chi) polymer is incorporated in BC with different concentrations. Different characterization techniques are used to investigate structural and optical properties of these composites. Radical scavenging activity test shows moderate antioxidant activity of these biocompatible composites whereasin vitrorelease test shows that 13.3% of chitosan is released after 72 h. Antibacterial testing of BC-Chi composites conducted on Gram-positive and Gram-negative bacteria causing UTIs and CAUTIs (Escherichia coli,Pseudomonas aeruginosa,Klebsiella pneumoniae) and encrustation (Proteus mirabilis) show bactericidal effect. The morphology analysis of bacteria after the application of BC-Chi shows that they are flattened with a rough surface, with a tendency to agglomerate and with decreased length and width. All obtained results show that BC-Chi composites might be considered as potential biomedical agents in treatment of UTIs and CAUTIs and as a urinary catheter coating in encrustation prevention.",
journal = "RSC Advances",
title = "Bactericidal and antioxidant bacterial cellulose hydrogels doped with chitosan as potential urinary tract infection biomedical agent",
volume = "11",
number = "15",
pages = "8559-8568",
doi = "10.1039/D0RA10782D"
}

Zmejkoski, D., Marković, Z. M., Zdravković, N. M., Trišić, D., Budimir, M., Kuzman, S., Kozyrovska, N. O., Orlovska, I. V., Bugárová, N., Petrović, Đ., Kováčová, M., Kleinová, A., Špitalský, Z., Pavlović, V. B.,& Todorović-Marković, B.. (2021). Bactericidal and antioxidant bacterial cellulose hydrogels doped with chitosan as potential urinary tract infection biomedical agent. in RSC Advances, 11(15), 8559-8568.
https://doi.org/10.1039/D0RA10782D

Zmejkoski D, Marković ZM, Zdravković NM, Trišić D, Budimir M, Kuzman S, Kozyrovska NO, Orlovska IV, Bugárová N, Petrović Đ, Kováčová M, Kleinová A, Špitalský Z, Pavlović VB, Todorović-Marković B. Bactericidal and antioxidant bacterial cellulose hydrogels doped with chitosan as potential urinary tract infection biomedical agent. in RSC Advances. 2021;11(15):8559-8568.
doi:10.1039/D0RA10782D .

Zmejkoski, Danica, Marković, Zoran M., Zdravković, Nemanja M., Trišić, Dijana, Budimir, Milica, Kuzman, Sanja, Kozyrovska, Natalia O., Orlovska, Iryna V., Bugárová, Nikol, Petrović, Đorđe, Kováčová, Mária, Kleinová, Angela, Špitalský, Zdeno, Pavlović, Vladimir B., Todorović-Marković, Biljana, "Bactericidal and antioxidant bacterial cellulose hydrogels doped with chitosan as potential urinary tract infection biomedical agent" in RSC Advances, 11, no. 15 (2021):8559-8568,
https://doi.org/10.1039/D0RA10782D . .

TY  - JOUR
AU  - Veljković, Filip M.
AU  - Radović, Ivana M.
AU  - Toprek, Dragan
AU  - Petrović, Đorđe
AU  - Stoiljković, Milovan
AU  - Mitić, Vojislav V.
AU  - Veličković, Suzana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10084
AB  - Due to the increased use of yttrium in agriculture and industry, there is a growing interest in the impact of yttrium on the environment and human health. Developing novel procedures to detect and quantify species of yttrium represents an important task. In this work, we apply laser desorption/ionization-mass spectrometry (LDI-MS) to detect cluster ions of the solution of yttrium(III) chloride (YCl3) at different pH values. The density functional theory (DFT) calculations were used to reveal the energetically most favored structures of the anions and cations chosen from the LDI-MS results. Examination of the positive and negative mode LDI mass spectra of YCl3 showed the presence of the heterogeneous mononuclear and polynuclear clusters, such as [YCl(OH) (H2O)3]++, [Y2(H2O)]++, [Y4H2(H2O)4]++, and [Y5O4H3]++ (at pH 2 and 5) and [Y2Cl2(H2O)2]−−, [Y2O5(HCl)(OH)]−−, and [Y3OH3(OH)2(H2O)]−− (at pH 2, 5, and 10). The variation in the pH solution of YCl3 slightly affects the LDI mass spectrum of these yttrium clusters. It has only been noticed that the [Y4H2(H2O)4]++ cluster ions were not detected at pH 10. These results can become a guide in the detection of yttrium chloride by LDI-MS in real samples in different fields (ecological, food, and human).
T2  - Modern Physics Letters B
T1  - Laser desorption/ionization time-of-flight mass spectrometry of yttrium(III) chloride
VL  - 35
IS  - 35
SP  - 2150454
DO  - 10.1142/S0217984921504546
ER  - 

@article{
author = "Veljković, Filip M. and Radović, Ivana M. and Toprek, Dragan and Petrović, Đorđe and Stoiljković, Milovan and Mitić, Vojislav V. and Veličković, Suzana",
year = "2021",
abstract = "Due to the increased use of yttrium in agriculture and industry, there is a growing interest in the impact of yttrium on the environment and human health. Developing novel procedures to detect and quantify species of yttrium represents an important task. In this work, we apply laser desorption/ionization-mass spectrometry (LDI-MS) to detect cluster ions of the solution of yttrium(III) chloride (YCl3) at different pH values. The density functional theory (DFT) calculations were used to reveal the energetically most favored structures of the anions and cations chosen from the LDI-MS results. Examination of the positive and negative mode LDI mass spectra of YCl3 showed the presence of the heterogeneous mononuclear and polynuclear clusters, such as [YCl(OH) (H2O)3]++, [Y2(H2O)]++, [Y4H2(H2O)4]++, and [Y5O4H3]++ (at pH 2 and 5) and [Y2Cl2(H2O)2]−−, [Y2O5(HCl)(OH)]−−, and [Y3OH3(OH)2(H2O)]−− (at pH 2, 5, and 10). The variation in the pH solution of YCl3 slightly affects the LDI mass spectrum of these yttrium clusters. It has only been noticed that the [Y4H2(H2O)4]++ cluster ions were not detected at pH 10. These results can become a guide in the detection of yttrium chloride by LDI-MS in real samples in different fields (ecological, food, and human).",
journal = "Modern Physics Letters B",
title = "Laser desorption/ionization time-of-flight mass spectrometry of yttrium(III) chloride",
volume = "35",
number = "35",
pages = "2150454",
doi = "10.1142/S0217984921504546"
}

Veljković, F. M., Radović, I. M., Toprek, D., Petrović, Đ., Stoiljković, M., Mitić, V. V.,& Veličković, S.. (2021). Laser desorption/ionization time-of-flight mass spectrometry of yttrium(III) chloride. in Modern Physics Letters B, 35(35), 2150454.
https://doi.org/10.1142/S0217984921504546

Veljković FM, Radović IM, Toprek D, Petrović Đ, Stoiljković M, Mitić VV, Veličković S. Laser desorption/ionization time-of-flight mass spectrometry of yttrium(III) chloride. in Modern Physics Letters B. 2021;35(35):2150454.
doi:10.1142/S0217984921504546 .

Veljković, Filip M., Radović, Ivana M., Toprek, Dragan, Petrović, Đorđe, Stoiljković, Milovan, Mitić, Vojislav V., Veličković, Suzana, "Laser desorption/ionization time-of-flight mass spectrometry of yttrium(III) chloride" in Modern Physics Letters B, 35, no. 35 (2021):2150454,
https://doi.org/10.1142/S0217984921504546 . .

TY  - JOUR
AU  - Matović, Ljiljana
AU  - Vujasin, Radojka
AU  - Kumrić, Ksenija
AU  - Devečerski, Aleksandar
AU  - Wu, Yi-nan 
AU  - Kabtamu, Daniel M.
AU  - Mirković, Marija D.
AU  - Omerašević, Mia
AU  - Petrović, Đorđe
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9791
AB  - Enhanced degradation of organic dye was achieved using two different kinds of waste materials: waste tire granules and spent sealed radioactive sources. Waste tire granules were used as raw material for the production of waste tire char (WTC), which was further utilized as an adsorbent matrix for synergetic adsorption/irradiation degradation of organic dye. The spent radioactive sources were radiographic sealed sources that originate from the industry which generate the high energy radiation. Methylene Blue (MB) was used as an organic model compound. Synthesized WTC has turbostratic structure, irregular shaped particles and developed mesoporous surface. Complete degradation of 0.02 dm3 of 100 mg dm−3 MB solution, having WTC dose of 1.25 g dm−3, was achieved with delivered doze of only 60 Gy. The applied doses were 100 times smaller than those presented in the literature. Degradation pathway was determined: OH radicals that originate from radiolysis of water and from the surface of WTC played the crucial role in the radiocatalytic degradation of MB. Breakage of the aromatic ring of MB appeared by the scission of the double C‒S+˭C bond as a result of the attack of OH species on adsorbed and electronically reorganized MB molecule. © 2020 Elsevier B.V.
T2  - Journal of Hazardous Materials
T1  - Waste tire carbon in synergetic interaction with spent gamma radioactive source for efficient radiocatalytic degradation of organic dye
VL  - 408
DO  - 10.1016/j.jhazmat.2020.124922
ER  - 

@article{
author = "Matović, Ljiljana and Vujasin, Radojka and Kumrić, Ksenija and Devečerski, Aleksandar and Wu, Yi-nan  and Kabtamu, Daniel M. and Mirković, Marija D. and Omerašević, Mia and Petrović, Đorđe",
year = "2021",
abstract = "Enhanced degradation of organic dye was achieved using two different kinds of waste materials: waste tire granules and spent sealed radioactive sources. Waste tire granules were used as raw material for the production of waste tire char (WTC), which was further utilized as an adsorbent matrix for synergetic adsorption/irradiation degradation of organic dye. The spent radioactive sources were radiographic sealed sources that originate from the industry which generate the high energy radiation. Methylene Blue (MB) was used as an organic model compound. Synthesized WTC has turbostratic structure, irregular shaped particles and developed mesoporous surface. Complete degradation of 0.02 dm3 of 100 mg dm−3 MB solution, having WTC dose of 1.25 g dm−3, was achieved with delivered doze of only 60 Gy. The applied doses were 100 times smaller than those presented in the literature. Degradation pathway was determined: OH radicals that originate from radiolysis of water and from the surface of WTC played the crucial role in the radiocatalytic degradation of MB. Breakage of the aromatic ring of MB appeared by the scission of the double C‒S+˭C bond as a result of the attack of OH species on adsorbed and electronically reorganized MB molecule. © 2020 Elsevier B.V.",
journal = "Journal of Hazardous Materials",
title = "Waste tire carbon in synergetic interaction with spent gamma radioactive source for efficient radiocatalytic degradation of organic dye",
volume = "408",
doi = "10.1016/j.jhazmat.2020.124922"
}

Matović, L., Vujasin, R., Kumrić, K., Devečerski, A., Wu, Y., Kabtamu, D. M., Mirković, M. D., Omerašević, M.,& Petrović, Đ.. (2021). Waste tire carbon in synergetic interaction with spent gamma radioactive source for efficient radiocatalytic degradation of organic dye. in Journal of Hazardous Materials, 408.
https://doi.org/10.1016/j.jhazmat.2020.124922

Matović L, Vujasin R, Kumrić K, Devečerski A, Wu Y, Kabtamu DM, Mirković MD, Omerašević M, Petrović Đ. Waste tire carbon in synergetic interaction with spent gamma radioactive source for efficient radiocatalytic degradation of organic dye. in Journal of Hazardous Materials. 2021;408.
doi:10.1016/j.jhazmat.2020.124922 .

Matović, Ljiljana, Vujasin, Radojka, Kumrić, Ksenija, Devečerski, Aleksandar, Wu, Yi-nan , Kabtamu, Daniel M., Mirković, Marija D., Omerašević, Mia, Petrović, Đorđe, "Waste tire carbon in synergetic interaction with spent gamma radioactive source for efficient radiocatalytic degradation of organic dye" in Journal of Hazardous Materials, 408 (2021),
https://doi.org/10.1016/j.jhazmat.2020.124922 . .

TY  - CONF
AU  - Petrović, Đorđe Ž.
AU  - Kumrić, Ksenija
AU  - Mirković, Marija D.
AU  - Ilić-Stojanović, Snežana
AU  - Matović, Ljiljana
AU  - Eraković, Zorica
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12080
AB  - The use of high energy, ionizing radiation in nuclear medicine is now pervasive and routine. The interaction of gamma radiation with aqueous solutions produces different kinds of reducing and oxidizing agents. Reducing agents represent eaq, H• and H2 while oxidizing agents represent H2O2, •OH, O2, O2 - and HO2 [1]. Production of such species under gamma irradiation, there may affect the rates or mechanisms of corrosion attack modes. In recent times, electrochemical frequency modulation (EFM) has caught the attention of corrosion scientists as a rapid and non–destructive technique for the instantaneous determination of corrosion rate. The advantage of the EFM technique is the fact that the measurement can be completed in a short time period [2]. The EFM technique offers an excellent alternative for the analysis of electrochemical corrosion behavior of metals compared with contemporary techniques like potentiodynamic polarization, linear polarization, electrochemical impedance spectroscopy and weight loss. This technique provides measurements of corrosion rate directly without knowledge of the Tafel constants. Even though the Tafel constants are not required, it measures them and a change in Tafel constant may indicate a change in corrosion mechanism. The theory behind the technique is the same Butler-Volmer kinetics that underpins all corrosion rate measurements. It is a small signal ac technique where two sine waves (at different frequencies) are applied to the cell simultaneously. In our work, we used the EFM technique to calculate the corrosion rate on stainless steel samples in saline and under gamma radiation.
AB  - Nerđajući čelici su omiljeni materijali u nuklearnoj medicini zbog jednostavnog održavanja (brisanje, dekontaminacija, itd.). Otpornost na rđanje ovih materijala je smanjena usled istovremenog delovanja hloridnih jona i jonizujućeg zračenja. Brza i nedestruktivna tehnika merenja korozije, kao što je elektrohemijska frekvenciona modulacija (EFM), korisna je za brzu procenu materijala koji moraju biti otporni na rđаnje. Tri različite cevi od nerđajućeg čelika su analizirane pomoću EFM metode i Gamry potenciostata / galvanostata, i izračunate su njihove brzine korozije. Uzorak označen kao S II, koji ne sadrži Mo u svom sastavu pokazuje veću brzinu korozije u odnosu na uzorke koji sadrže Mo ako je istovremeno izložen hloridnim jonima i gama zračenju. Ovaj rezultat je u sagalsnosti sa sastavom nerdjajučćeg čelika dobijenim rentgenskim fluorescentnim spektrometrom koji pokazuje nedostatak bakra i vanadijuma u tragovima, uključujući molibden.
PB  - Belgrade : Serbian Chemical Society
C3  - 57th Meeting of the Serbian Chemical Society : Book of Abstracts, Proceedings
T1  - Corrosion Rate of Stainless Steel Tubes Calculated by Electrochemical Frequency Modulation
T1  - Brzina korozije cevi od nerđajućih čelika izračunata pomoću elektrohemijske frekvencione modulacije
SP  - 108
EP  - 113
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12080
ER  - 

@conference{
author = "Petrović, Đorđe Ž. and Kumrić, Ksenija and Mirković, Marija D. and Ilić-Stojanović, Snežana and Matović, Ljiljana and Eraković, Zorica",
year = "2021",
abstract = "The use of high energy, ionizing radiation in nuclear medicine is now pervasive and routine. The interaction of gamma radiation with aqueous solutions produces different kinds of reducing and oxidizing agents. Reducing agents represent eaq, H• and H2 while oxidizing agents represent H2O2, •OH, O2, O2 - and HO2 [1]. Production of such species under gamma irradiation, there may affect the rates or mechanisms of corrosion attack modes. In recent times, electrochemical frequency modulation (EFM) has caught the attention of corrosion scientists as a rapid and non–destructive technique for the instantaneous determination of corrosion rate. The advantage of the EFM technique is the fact that the measurement can be completed in a short time period [2]. The EFM technique offers an excellent alternative for the analysis of electrochemical corrosion behavior of metals compared with contemporary techniques like potentiodynamic polarization, linear polarization, electrochemical impedance spectroscopy and weight loss. This technique provides measurements of corrosion rate directly without knowledge of the Tafel constants. Even though the Tafel constants are not required, it measures them and a change in Tafel constant may indicate a change in corrosion mechanism. The theory behind the technique is the same Butler-Volmer kinetics that underpins all corrosion rate measurements. It is a small signal ac technique where two sine waves (at different frequencies) are applied to the cell simultaneously. In our work, we used the EFM technique to calculate the corrosion rate on stainless steel samples in saline and under gamma radiation., Nerđajući čelici su omiljeni materijali u nuklearnoj medicini zbog jednostavnog održavanja (brisanje, dekontaminacija, itd.). Otpornost na rđanje ovih materijala je smanjena usled istovremenog delovanja hloridnih jona i jonizujućeg zračenja. Brza i nedestruktivna tehnika merenja korozije, kao što je elektrohemijska frekvenciona modulacija (EFM), korisna je za brzu procenu materijala koji moraju biti otporni na rđаnje. Tri različite cevi od nerđajućeg čelika su analizirane pomoću EFM metode i Gamry potenciostata / galvanostata, i izračunate su njihove brzine korozije. Uzorak označen kao S II, koji ne sadrži Mo u svom sastavu pokazuje veću brzinu korozije u odnosu na uzorke koji sadrže Mo ako je istovremeno izložen hloridnim jonima i gama zračenju. Ovaj rezultat je u sagalsnosti sa sastavom nerdjajučćeg čelika dobijenim rentgenskim fluorescentnim spektrometrom koji pokazuje nedostatak bakra i vanadijuma u tragovima, uključujući molibden.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "57th Meeting of the Serbian Chemical Society : Book of Abstracts, Proceedings",
title = "Corrosion Rate of Stainless Steel Tubes Calculated by Electrochemical Frequency Modulation, Brzina korozije cevi od nerđajućih čelika izračunata pomoću elektrohemijske frekvencione modulacije",
pages = "108-113",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12080"
}

Petrović, Đ. Ž., Kumrić, K., Mirković, M. D., Ilić-Stojanović, S., Matović, L.,& Eraković, Z.. (2021). Corrosion Rate of Stainless Steel Tubes Calculated by Electrochemical Frequency Modulation. in 57th Meeting of the Serbian Chemical Society : Book of Abstracts, Proceedings
Belgrade : Serbian Chemical Society., 108-113.
https://hdl.handle.net/21.15107/rcub_vinar_12080

Petrović ĐŽ, Kumrić K, Mirković MD, Ilić-Stojanović S, Matović L, Eraković Z. Corrosion Rate of Stainless Steel Tubes Calculated by Electrochemical Frequency Modulation. in 57th Meeting of the Serbian Chemical Society : Book of Abstracts, Proceedings. 2021;:108-113.
https://hdl.handle.net/21.15107/rcub_vinar_12080 .

Petrović, Đorđe Ž., Kumrić, Ksenija, Mirković, Marija D., Ilić-Stojanović, Snežana, Matović, Ljiljana, Eraković, Zorica, "Corrosion Rate of Stainless Steel Tubes Calculated by Electrochemical Frequency Modulation" in 57th Meeting of the Serbian Chemical Society : Book of Abstracts, Proceedings (2021):108-113,
https://hdl.handle.net/21.15107/rcub_vinar_12080 .

TY  - CONF
AU  - Stanković, Katarina
AU  - Vujasin, Radojka
AU  - Egerić, Marija
AU  - Matović, Ljiljana
AU  - Petrović, Đorđe Ž.
AU  - Kumrić, Ksenija
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12081
AB  - Most heavy metals, such as Cr (chromium), Pb (lead), Cd (cadmium), Ni (nickel), Cu (copper) and Fe (iron), are extremely toxic above a tolerance limit. These heavy metals in wastewater are not biodegradable and can cause serious harm to human health and ecological environments.1 One of the top-priority toxic heavy metal in wastewater is chromium.2 In natural waters, chromium exists in both trivalent Cr(III) and hexavalent Cr(VI) forms. Cr(VI) is the most toxic one and have the tolerance limit 0.1 mg/L into surface water and 0.05 mg/L in potable water.3 Various methods, such as ion exchange, sedimentation, electrochemical process, cementation, coagulation, adsorption and solvent extraction have been developed for the removal of Cr(VI) and other toxic metals from wastewater.4 Among these methods, in some papers,5-8 adsorption has been used as one of the most effective method for the removal of Cr(VI) from aqueous solutions. Characteristics of adsorption, such as low cost, easy to perform, efficient and reversible method with high operating speed, make this method as most commonly used for the removal of Cr(VI) from aqueous solutions.9 Several adsorbents, like activated alumina,10 zeolites,11 natural bisorbents such as chitosan,12 but also activated carbon13 have been used for the removal of Cr(VI) from aqueous solutions. Due to the high cost, commercial activated carbon is not available in less developed countries and there is a considerable attention to produce activated carbon from less expensive and available materials. As a low-cost adsorbent, activated carbon can be produced from materials such as rice husk, seeds husk, tea leaves, sawdust, oil palm shell, coconut husk and coconut shell.14 Activated carbon is one of the most important adsorbents which is applied in different areas. In these areas it is important to determine and remove low concentrations of some pollutants, such as heavy metals. Very good features of this adsorbent are the main reason why it is used, such as large surface area, porous structure, high adsorption capacity, selective adsorption and low cost. Also, it is important to note that activated carbon has microcrystalline structure with different size and shape of pores, while surface groups plays important role in the adsorption process. Carbon - oxygen surface groups are the most important and they influence the surface characteristics, such as polarity and physicochemical properties of adsorbent. There are two processes for preparation of activated carbon, chemical activation which involves presence of chemical agents, and physical activation, which involves carbonization.15-16 For this research, low-cost powdered activated carbon made from coconut shell was used as adsorbent to remove Cr(VI) from aqueous solutions. Characterization of activated carbon, produced from coconut shell, was accomplished using scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) method. The effects of three 57. savetovanje SHD 137 adsorption parameters, such as solution pH, contact time and initial Cr(VI) concentration, were investigated with respect to the removal efficiency of Cr(VI) from aqueous solutions. Adsorption equilibrium characteristics were analyzed by using the two adsorption models, namely the Langmuir and the Freundlich isotherms.
AB  - Praškast ugljenični materijal proizveden iz kokosove ljuske korišćen je kao adsorbent za uklanjanje Cr(VI) jona iz vodenih rastvora. Karakterizacija adsorbenta rađena je primenom dve analitičke tehnike, skenirajućom elektronskom mikroskopijom (SEM) i BET metodom. Eksperimenti adsorpcije rađeni su u šaržnom režimu, kako bi se istražili uticaji pH rastvora, vremena kontakta i početne koncentracije Cr(VI) jona. Eksperimentalni rezultati su pokazali da je efikasnost uklanjanja Cr(VI) najveća u pH intervalu od 2,0 do 3,5, a da se ravnoteža uspostavlja nakon 60 minuta. Dva ravnotežna adsorpciona modela, Langmirov i Frojndlihov, korišćena su za fitovanje dobijenih podataka. Frojndlihova izoterma je obezbedila najbolju korelaciju za adsorpciju Cr(VI) jona na ugljeničnom materijalu proizvedenom iz kokosove ljuske. Na osnovu dobijenih rezultata može se zaključiti da ugljenični materijal proizveden iz kokosove ljuske predstavlja jeftin i efikasan adsorbent koji bi potencijalno mogao biti korišćen za tretman otpadnih voda koje sadrže toksični Cr(VI).
PB  - Belgrade : Serbian Chemical Society
C3  - 57th Meeting of the Serbian Chemical Society : Book of Abstracts, Proceedings
T1  - Chromium(VI) removal from aqueous solutions using powdered coconut shell activated carbon as a low-cost adsorbent
T1  - Uklanjanje hroma(VI) iz vode primenom praškastog ugljeničnog materijala dobijenog iz kokosove ljuske kao jeftinog adsorbenta
SP  - 136
EP  - 142
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12081
ER  - 

@conference{
author = "Stanković, Katarina and Vujasin, Radojka and Egerić, Marija and Matović, Ljiljana and Petrović, Đorđe Ž. and Kumrić, Ksenija",
year = "2021",
abstract = "Most heavy metals, such as Cr (chromium), Pb (lead), Cd (cadmium), Ni (nickel), Cu (copper) and Fe (iron), are extremely toxic above a tolerance limit. These heavy metals in wastewater are not biodegradable and can cause serious harm to human health and ecological environments.1 One of the top-priority toxic heavy metal in wastewater is chromium.2 In natural waters, chromium exists in both trivalent Cr(III) and hexavalent Cr(VI) forms. Cr(VI) is the most toxic one and have the tolerance limit 0.1 mg/L into surface water and 0.05 mg/L in potable water.3 Various methods, such as ion exchange, sedimentation, electrochemical process, cementation, coagulation, adsorption and solvent extraction have been developed for the removal of Cr(VI) and other toxic metals from wastewater.4 Among these methods, in some papers,5-8 adsorption has been used as one of the most effective method for the removal of Cr(VI) from aqueous solutions. Characteristics of adsorption, such as low cost, easy to perform, efficient and reversible method with high operating speed, make this method as most commonly used for the removal of Cr(VI) from aqueous solutions.9 Several adsorbents, like activated alumina,10 zeolites,11 natural bisorbents such as chitosan,12 but also activated carbon13 have been used for the removal of Cr(VI) from aqueous solutions. Due to the high cost, commercial activated carbon is not available in less developed countries and there is a considerable attention to produce activated carbon from less expensive and available materials. As a low-cost adsorbent, activated carbon can be produced from materials such as rice husk, seeds husk, tea leaves, sawdust, oil palm shell, coconut husk and coconut shell.14 Activated carbon is one of the most important adsorbents which is applied in different areas. In these areas it is important to determine and remove low concentrations of some pollutants, such as heavy metals. Very good features of this adsorbent are the main reason why it is used, such as large surface area, porous structure, high adsorption capacity, selective adsorption and low cost. Also, it is important to note that activated carbon has microcrystalline structure with different size and shape of pores, while surface groups plays important role in the adsorption process. Carbon - oxygen surface groups are the most important and they influence the surface characteristics, such as polarity and physicochemical properties of adsorbent. There are two processes for preparation of activated carbon, chemical activation which involves presence of chemical agents, and physical activation, which involves carbonization.15-16 For this research, low-cost powdered activated carbon made from coconut shell was used as adsorbent to remove Cr(VI) from aqueous solutions. Characterization of activated carbon, produced from coconut shell, was accomplished using scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) method. The effects of three 57. savetovanje SHD 137 adsorption parameters, such as solution pH, contact time and initial Cr(VI) concentration, were investigated with respect to the removal efficiency of Cr(VI) from aqueous solutions. Adsorption equilibrium characteristics were analyzed by using the two adsorption models, namely the Langmuir and the Freundlich isotherms., Praškast ugljenični materijal proizveden iz kokosove ljuske korišćen je kao adsorbent za uklanjanje Cr(VI) jona iz vodenih rastvora. Karakterizacija adsorbenta rađena je primenom dve analitičke tehnike, skenirajućom elektronskom mikroskopijom (SEM) i BET metodom. Eksperimenti adsorpcije rađeni su u šaržnom režimu, kako bi se istražili uticaji pH rastvora, vremena kontakta i početne koncentracije Cr(VI) jona. Eksperimentalni rezultati su pokazali da je efikasnost uklanjanja Cr(VI) najveća u pH intervalu od 2,0 do 3,5, a da se ravnoteža uspostavlja nakon 60 minuta. Dva ravnotežna adsorpciona modela, Langmirov i Frojndlihov, korišćena su za fitovanje dobijenih podataka. Frojndlihova izoterma je obezbedila najbolju korelaciju za adsorpciju Cr(VI) jona na ugljeničnom materijalu proizvedenom iz kokosove ljuske. Na osnovu dobijenih rezultata može se zaključiti da ugljenični materijal proizveden iz kokosove ljuske predstavlja jeftin i efikasan adsorbent koji bi potencijalno mogao biti korišćen za tretman otpadnih voda koje sadrže toksični Cr(VI).",
publisher = "Belgrade : Serbian Chemical Society",
journal = "57th Meeting of the Serbian Chemical Society : Book of Abstracts, Proceedings",
title = "Chromium(VI) removal from aqueous solutions using powdered coconut shell activated carbon as a low-cost adsorbent, Uklanjanje hroma(VI) iz vode primenom praškastog ugljeničnog materijala dobijenog iz kokosove ljuske kao jeftinog adsorbenta",
pages = "136-142",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12081"
}

Stanković, K., Vujasin, R., Egerić, M., Matović, L., Petrović, Đ. Ž.,& Kumrić, K.. (2021). Chromium(VI) removal from aqueous solutions using powdered coconut shell activated carbon as a low-cost adsorbent. in 57th Meeting of the Serbian Chemical Society : Book of Abstracts, Proceedings
Belgrade : Serbian Chemical Society., 136-142.
https://hdl.handle.net/21.15107/rcub_vinar_12081

Stanković K, Vujasin R, Egerić M, Matović L, Petrović ĐŽ, Kumrić K. Chromium(VI) removal from aqueous solutions using powdered coconut shell activated carbon as a low-cost adsorbent. in 57th Meeting of the Serbian Chemical Society : Book of Abstracts, Proceedings. 2021;:136-142.
https://hdl.handle.net/21.15107/rcub_vinar_12081 .

Stanković, Katarina, Vujasin, Radojka, Egerić, Marija, Matović, Ljiljana, Petrović, Đorđe Ž., Kumrić, Ksenija, "Chromium(VI) removal from aqueous solutions using powdered coconut shell activated carbon as a low-cost adsorbent" in 57th Meeting of the Serbian Chemical Society : Book of Abstracts, Proceedings (2021):136-142,
https://hdl.handle.net/21.15107/rcub_vinar_12081 .

TY  - CONF
AU  - Vujasin, Radojka
AU  - Stanković, Srboljub
AU  - Kumrić, Ksenija
AU  - Devečerski, Aleksandar
AU  - Wu, Yi-nan
AU  - Petrović, Đorđe Ž.
AU  - Matović, Ljiljana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12086
PB  - Leskovac : Faculty of Technology
C3  - 14th Symposium with International Participation "Novel Technologies and Economic Development" : Book of abstracts
T1  - Stabilization of heavy metals in electroplating sludge using chelating agent
SP  - 111
EP  - 111
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12086
ER  - 

@conference{
author = "Vujasin, Radojka and Stanković, Srboljub and Kumrić, Ksenija and Devečerski, Aleksandar and Wu, Yi-nan and Petrović, Đorđe Ž. and Matović, Ljiljana",
year = "2021",
publisher = "Leskovac : Faculty of Technology",
journal = "14th Symposium with International Participation "Novel Technologies and Economic Development" : Book of abstracts",
title = "Stabilization of heavy metals in electroplating sludge using chelating agent",
pages = "111-111",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12086"
}

Vujasin, R., Stanković, S., Kumrić, K., Devečerski, A., Wu, Y., Petrović, Đ. Ž.,& Matović, L.. (2021). Stabilization of heavy metals in electroplating sludge using chelating agent. in 14th Symposium with International Participation "Novel Technologies and Economic Development" : Book of abstracts
Leskovac : Faculty of Technology., 111-111.
https://hdl.handle.net/21.15107/rcub_vinar_12086

Vujasin R, Stanković S, Kumrić K, Devečerski A, Wu Y, Petrović ĐŽ, Matović L. Stabilization of heavy metals in electroplating sludge using chelating agent. in 14th Symposium with International Participation "Novel Technologies and Economic Development" : Book of abstracts. 2021;:111-111.
https://hdl.handle.net/21.15107/rcub_vinar_12086 .

Vujasin, Radojka, Stanković, Srboljub, Kumrić, Ksenija, Devečerski, Aleksandar, Wu, Yi-nan, Petrović, Đorđe Ž., Matović, Ljiljana, "Stabilization of heavy metals in electroplating sludge using chelating agent" in 14th Symposium with International Participation "Novel Technologies and Economic Development" : Book of abstracts (2021):111-111,
https://hdl.handle.net/21.15107/rcub_vinar_12086 .

TY  - CONF
AU  - Stanković, Katarina
AU  - Kumrić, Ksenija
AU  - Wu, Yi-nan
AU  - Petrović, Đorđe Ž.
AU  - Egerić, Marija
AU  - Vujasin, Radojka
AU  - Matović, Ljiljana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12087
PB  - Leskovac : Faculty of Technology
C3  - 14th Symposium with International Participation "Novel Technologies and Economic Development" : Book of abstracts
T1  - Zirconium-based metal-organic framework UiO-66 as adsorbent for efficient removal of Cr(VI) from aqueous solutions
SP  - 112
EP  - 112
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12087
ER  - 

@conference{
author = "Stanković, Katarina and Kumrić, Ksenija and Wu, Yi-nan and Petrović, Đorđe Ž. and Egerić, Marija and Vujasin, Radojka and Matović, Ljiljana",
year = "2021",
publisher = "Leskovac : Faculty of Technology",
journal = "14th Symposium with International Participation "Novel Technologies and Economic Development" : Book of abstracts",
title = "Zirconium-based metal-organic framework UiO-66 as adsorbent for efficient removal of Cr(VI) from aqueous solutions",
pages = "112-112",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12087"
}

Stanković, K., Kumrić, K., Wu, Y., Petrović, Đ. Ž., Egerić, M., Vujasin, R.,& Matović, L.. (2021). Zirconium-based metal-organic framework UiO-66 as adsorbent for efficient removal of Cr(VI) from aqueous solutions. in 14th Symposium with International Participation "Novel Technologies and Economic Development" : Book of abstracts
Leskovac : Faculty of Technology., 112-112.
https://hdl.handle.net/21.15107/rcub_vinar_12087

Stanković K, Kumrić K, Wu Y, Petrović ĐŽ, Egerić M, Vujasin R, Matović L. Zirconium-based metal-organic framework UiO-66 as adsorbent for efficient removal of Cr(VI) from aqueous solutions. in 14th Symposium with International Participation "Novel Technologies and Economic Development" : Book of abstracts. 2021;:112-112.
https://hdl.handle.net/21.15107/rcub_vinar_12087 .

Stanković, Katarina, Kumrić, Ksenija, Wu, Yi-nan, Petrović, Đorđe Ž., Egerić, Marija, Vujasin, Radojka, Matović, Ljiljana, "Zirconium-based metal-organic framework UiO-66 as adsorbent for efficient removal of Cr(VI) from aqueous solutions" in 14th Symposium with International Participation "Novel Technologies and Economic Development" : Book of abstracts (2021):112-112,
https://hdl.handle.net/21.15107/rcub_vinar_12087 .

TY  - CONF
AU  - Stanković, Katarina
AU  - Petrović, Đorđe Ž.
AU  - Telečki, Igor
AU  - Vujasin, Radojka
AU  - Matović, Ljiljana
AU  - Devečerski, Aleksandar
AU  - Kumrić, Ksenija
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12090
PB  - Leskovac : Faculty of Technology
C3  - 14th Symposium with International Participation "Novel Technologies and Economic Development" : Book of abstracts
T1  - Adsorptive removal of heavy metals by citric acid functionalized chitosan hydrogel beads: batch and continuous fixed-bed column study
SP  - 113
EP  - 113
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12090
ER  - 

@conference{
author = "Stanković, Katarina and Petrović, Đorđe Ž. and Telečki, Igor and Vujasin, Radojka and Matović, Ljiljana and Devečerski, Aleksandar and Kumrić, Ksenija",
year = "2021",
publisher = "Leskovac : Faculty of Technology",
journal = "14th Symposium with International Participation "Novel Technologies and Economic Development" : Book of abstracts",
title = "Adsorptive removal of heavy metals by citric acid functionalized chitosan hydrogel beads: batch and continuous fixed-bed column study",
pages = "113-113",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12090"
}

Stanković, K., Petrović, Đ. Ž., Telečki, I., Vujasin, R., Matović, L., Devečerski, A.,& Kumrić, K.. (2021). Adsorptive removal of heavy metals by citric acid functionalized chitosan hydrogel beads: batch and continuous fixed-bed column study. in 14th Symposium with International Participation "Novel Technologies and Economic Development" : Book of abstracts
Leskovac : Faculty of Technology., 113-113.
https://hdl.handle.net/21.15107/rcub_vinar_12090

Stanković K, Petrović ĐŽ, Telečki I, Vujasin R, Matović L, Devečerski A, Kumrić K. Adsorptive removal of heavy metals by citric acid functionalized chitosan hydrogel beads: batch and continuous fixed-bed column study. in 14th Symposium with International Participation "Novel Technologies and Economic Development" : Book of abstracts. 2021;:113-113.
https://hdl.handle.net/21.15107/rcub_vinar_12090 .

Stanković, Katarina, Petrović, Đorđe Ž., Telečki, Igor, Vujasin, Radojka, Matović, Ljiljana, Devečerski, Aleksandar, Kumrić, Ksenija, "Adsorptive removal of heavy metals by citric acid functionalized chitosan hydrogel beads: batch and continuous fixed-bed column study" in 14th Symposium with International Participation "Novel Technologies and Economic Development" : Book of abstracts (2021):113-113,
https://hdl.handle.net/21.15107/rcub_vinar_12090 .

TY  - JOUR
AU  - Mirković, Marija D.
AU  - Milanović, Zorana
AU  - Stanković, Dalibor M.
AU  - Petrović, Đorđe
AU  - Vranješ-Đurić, Sanja
AU  - Janković, Drina
AU  - Radović, Magdalena
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10698
AB  - Application of bone-seeking radiopharmaceuticals is one of the modalities in the management of metastatic bone pain. The present study aimed to investigate the potential of Lu-177-labeled phosphate/phosphonate ligands: 1-hydroxyethane 1,1-diphosphonic acid (HEDP), 2,3-dicarboxypropane-1,1-diphosphonic acid (DPD), and imidodiphosphate tetrasodium salt (IDP), as bone pain palliation agents. HEDP, DPD, and IDP were radiolabeled with Lu-177 in high radiolabeling yield (98.49%, 93.31%, and 90.69%, respectively), forming in vitro stable radiolabeled complexes in saline and human serum after 96 h. Biodistribution was followed by imaging studies and ex vivo measurement of radioactivity in organs in healthy Wistar rats. Significant bone accumulation and long retention even after 96 h (3.85 +/- 0.91%ID/g), as well as relatively low uptake in soft tissue such as liver and spleen (<1%ID/g), were observed for Lu-177-HEDP. Two other radiolabeled ligands showed lower accumulations in bone (<1% ID/g) and higher accumulations in liver and spleen at examined time points (>1.5% ID/g). Obtained results suggest that difference in the chemical structure of phosphonates/phosphates influences the rate of bone incorporation of Lu-177-radiolabeled complexes. Desirable biodistribution pattern of Lu-177-HEDP makes it suitable for its further preclinical investigations as a potential bone pain palliation agent.
T2  - Journal of Radiation Research and Applied Sciences
T1  - Investigation of 177Lu-labeled HEDP, DPD, and IDP as potential bone pain palliation agents
VL  - 13
IS  - 1
SP  - 27
EP  - 36
DO  - 10.1080/16878507.2019.1702243
ER  - 

@article{
author = "Mirković, Marija D. and Milanović, Zorana and Stanković, Dalibor M. and Petrović, Đorđe and Vranješ-Đurić, Sanja and Janković, Drina and Radović, Magdalena",
year = "2020",
abstract = "Application of bone-seeking radiopharmaceuticals is one of the modalities in the management of metastatic bone pain. The present study aimed to investigate the potential of Lu-177-labeled phosphate/phosphonate ligands: 1-hydroxyethane 1,1-diphosphonic acid (HEDP), 2,3-dicarboxypropane-1,1-diphosphonic acid (DPD), and imidodiphosphate tetrasodium salt (IDP), as bone pain palliation agents. HEDP, DPD, and IDP were radiolabeled with Lu-177 in high radiolabeling yield (98.49%, 93.31%, and 90.69%, respectively), forming in vitro stable radiolabeled complexes in saline and human serum after 96 h. Biodistribution was followed by imaging studies and ex vivo measurement of radioactivity in organs in healthy Wistar rats. Significant bone accumulation and long retention even after 96 h (3.85 +/- 0.91%ID/g), as well as relatively low uptake in soft tissue such as liver and spleen (<1%ID/g), were observed for Lu-177-HEDP. Two other radiolabeled ligands showed lower accumulations in bone (<1% ID/g) and higher accumulations in liver and spleen at examined time points (>1.5% ID/g). Obtained results suggest that difference in the chemical structure of phosphonates/phosphates influences the rate of bone incorporation of Lu-177-radiolabeled complexes. Desirable biodistribution pattern of Lu-177-HEDP makes it suitable for its further preclinical investigations as a potential bone pain palliation agent.",
journal = "Journal of Radiation Research and Applied Sciences",
title = "Investigation of 177Lu-labeled HEDP, DPD, and IDP as potential bone pain palliation agents",
volume = "13",
number = "1",
pages = "27-36",
doi = "10.1080/16878507.2019.1702243"
}

Mirković, M. D., Milanović, Z., Stanković, D. M., Petrović, Đ., Vranješ-Đurić, S., Janković, D.,& Radović, M.. (2020). Investigation of 177Lu-labeled HEDP, DPD, and IDP as potential bone pain palliation agents. in Journal of Radiation Research and Applied Sciences, 13(1), 27-36.
https://doi.org/10.1080/16878507.2019.1702243

Mirković MD, Milanović Z, Stanković DM, Petrović Đ, Vranješ-Đurić S, Janković D, Radović M. Investigation of 177Lu-labeled HEDP, DPD, and IDP as potential bone pain palliation agents. in Journal of Radiation Research and Applied Sciences. 2020;13(1):27-36.
doi:10.1080/16878507.2019.1702243 .

Mirković, Marija D., Milanović, Zorana, Stanković, Dalibor M., Petrović, Đorđe, Vranješ-Đurić, Sanja, Janković, Drina, Radović, Magdalena, "Investigation of 177Lu-labeled HEDP, DPD, and IDP as potential bone pain palliation agents" in Journal of Radiation Research and Applied Sciences, 13, no. 1 (2020):27-36,
https://doi.org/10.1080/16878507.2019.1702243 . .

TY  - JOUR
AU  - Ilić-Stojanović, Snežana
AU  - Urošević, Maja
AU  - Nikolić, Ljubiša
AU  - Petrović, Đorđe
AU  - Stanojević, Jelena
AU  - Najman, Stevo
AU  - Nikolić, Vesna
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9033
AB  - Poly(N-isopropylmethacrylamide) (p(NiPMAm)) is one of the lesser known homopolymers that has significant potential for designing new “intelligent” materials. The aims of this work were the synthesis a series of cross-linked p(NiPMAm) hydrogels by the free radical polymerization method and the application of gamma-ray radiation for additional cross-linking. The synthesized p(NiPMAm) hydrogels were structurally characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The amount of unreacted monomers was analyzed using high pressure liquid chromatography (HPLC) to evaluate conversion of monomers into polymers. The swelling behavior was monitored in dependence of pH and temperature changes. The previous aim of gamma-ray radiation was the further the cross-linkage of the obtained hydrogel sample in the gelatinous, paste-like state, but the gamma-ray radiation caused decomposition. After absorbing irradiation doses, they transformed into the liquid phase. The results obtained by the gel permeation chromatography (GPC) method indicated that only oligomers and monomers were present in the irradiated liquid material, without molecules with a higher average molar mass, i.e., that the decomposition of the hydrogels occurred. Additionally, the irradiated liquid material was analyzed using the static headspace gas chromatography mass spectrometry (HSS-GC/MS) and gas chromatography/flame ionization detection (HSS-GC/FID) methods. The presence of unchanged initiator molecule and a dominant amount of four new molecules that were different from homopolymers and the reactant (monomer and cross-linker) were determined.
T2  - Polymers
T1  - Intelligent Poly(N-Isopropylmethacrylamide) Hydrogels: Synthesis, Structure Characterization, Stimuli-Responsive Swelling Properties, and Their Radiation Decomposition
VL  - 12
IS  - 5
SP  - 1112
DO  - 10.3390/polym12051112
ER  - 

@article{
author = "Ilić-Stojanović, Snežana and Urošević, Maja and Nikolić, Ljubiša and Petrović, Đorđe and Stanojević, Jelena and Najman, Stevo and Nikolić, Vesna",
year = "2020",
abstract = "Poly(N-isopropylmethacrylamide) (p(NiPMAm)) is one of the lesser known homopolymers that has significant potential for designing new “intelligent” materials. The aims of this work were the synthesis a series of cross-linked p(NiPMAm) hydrogels by the free radical polymerization method and the application of gamma-ray radiation for additional cross-linking. The synthesized p(NiPMAm) hydrogels were structurally characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The amount of unreacted monomers was analyzed using high pressure liquid chromatography (HPLC) to evaluate conversion of monomers into polymers. The swelling behavior was monitored in dependence of pH and temperature changes. The previous aim of gamma-ray radiation was the further the cross-linkage of the obtained hydrogel sample in the gelatinous, paste-like state, but the gamma-ray radiation caused decomposition. After absorbing irradiation doses, they transformed into the liquid phase. The results obtained by the gel permeation chromatography (GPC) method indicated that only oligomers and monomers were present in the irradiated liquid material, without molecules with a higher average molar mass, i.e., that the decomposition of the hydrogels occurred. Additionally, the irradiated liquid material was analyzed using the static headspace gas chromatography mass spectrometry (HSS-GC/MS) and gas chromatography/flame ionization detection (HSS-GC/FID) methods. The presence of unchanged initiator molecule and a dominant amount of four new molecules that were different from homopolymers and the reactant (monomer and cross-linker) were determined.",
journal = "Polymers",
title = "Intelligent Poly(N-Isopropylmethacrylamide) Hydrogels: Synthesis, Structure Characterization, Stimuli-Responsive Swelling Properties, and Their Radiation Decomposition",
volume = "12",
number = "5",
pages = "1112",
doi = "10.3390/polym12051112"
}

Ilić-Stojanović, S., Urošević, M., Nikolić, L., Petrović, Đ., Stanojević, J., Najman, S.,& Nikolić, V.. (2020). Intelligent Poly(N-Isopropylmethacrylamide) Hydrogels: Synthesis, Structure Characterization, Stimuli-Responsive Swelling Properties, and Their Radiation Decomposition. in Polymers, 12(5), 1112.
https://doi.org/10.3390/polym12051112

Ilić-Stojanović S, Urošević M, Nikolić L, Petrović Đ, Stanojević J, Najman S, Nikolić V. Intelligent Poly(N-Isopropylmethacrylamide) Hydrogels: Synthesis, Structure Characterization, Stimuli-Responsive Swelling Properties, and Their Radiation Decomposition. in Polymers. 2020;12(5):1112.
doi:10.3390/polym12051112 .

Ilić-Stojanović, Snežana, Urošević, Maja, Nikolić, Ljubiša, Petrović, Đorđe, Stanojević, Jelena, Najman, Stevo, Nikolić, Vesna, "Intelligent Poly(N-Isopropylmethacrylamide) Hydrogels: Synthesis, Structure Characterization, Stimuli-Responsive Swelling Properties, and Their Radiation Decomposition" in Polymers, 12, no. 5 (2020):1112,
https://doi.org/10.3390/polym12051112 . .

TY  - CONF
AU  - Eraković, Zorica
AU  - Ilić-Stojanović, Snežana
AU  - Cakić, Suzana
AU  - Nikolić, Ljubiša
AU  - Petrović, Slobodan D.
AU  - Veljović, Đorđe
AU  - Petrović, Đorđe
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11136
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2020 : 8th International Conference on Radiation in Various Fields of Research : book of abstracts; Virtual Conference
T1  - Swelling behavior of synthesized poly(1-vinyl-2-pyrrolidone-co-vinyl acetate) hydrogels
SP  - 55
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11136
ER  - 

@conference{
author = "Eraković, Zorica and Ilić-Stojanović, Snežana and Cakić, Suzana and Nikolić, Ljubiša and Petrović, Slobodan D. and Veljović, Đorđe and Petrović, Đorđe",
year = "2020",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2020 : 8th International Conference on Radiation in Various Fields of Research : book of abstracts; Virtual Conference",
title = "Swelling behavior of synthesized poly(1-vinyl-2-pyrrolidone-co-vinyl acetate) hydrogels",
pages = "55",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11136"
}

Eraković, Z., Ilić-Stojanović, S., Cakić, S., Nikolić, L., Petrović, S. D., Veljović, Đ.,& Petrović, Đ.. (2020). Swelling behavior of synthesized poly(1-vinyl-2-pyrrolidone-co-vinyl acetate) hydrogels. in RAD 2020 : 8th International Conference on Radiation in Various Fields of Research : book of abstracts; Virtual Conference
RAD Centre, Niš, Serbia., 55.
https://hdl.handle.net/21.15107/rcub_vinar_11136

Eraković Z, Ilić-Stojanović S, Cakić S, Nikolić L, Petrović SD, Veljović Đ, Petrović Đ. Swelling behavior of synthesized poly(1-vinyl-2-pyrrolidone-co-vinyl acetate) hydrogels. in RAD 2020 : 8th International Conference on Radiation in Various Fields of Research : book of abstracts; Virtual Conference. 2020;:55.
https://hdl.handle.net/21.15107/rcub_vinar_11136 .

Eraković, Zorica, Ilić-Stojanović, Snežana, Cakić, Suzana, Nikolić, Ljubiša, Petrović, Slobodan D., Veljović, Đorđe, Petrović, Đorđe, "Swelling behavior of synthesized poly(1-vinyl-2-pyrrolidone-co-vinyl acetate) hydrogels" in RAD 2020 : 8th International Conference on Radiation in Various Fields of Research : book of abstracts; Virtual Conference (2020):55,
https://hdl.handle.net/21.15107/rcub_vinar_11136 .

TY  - JOUR
AU  - Kumrić, Ksenija
AU  - Vujasin, Radojka
AU  - Egerić, Marija
AU  - Petrović, Đorđe
AU  - Devečerski, Aleksandar
AU  - Matović, Ljiljana
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8678
AB  - Solid-phase extraction (SPE) on activated carbon derived from coconut shell (CSAC) for the preconcentration of four varying polarity pesticides (imidacloprid, acetamiprid, simazine, and linuron) prior to their determination using high performance liquid chromatography with diode array detector (HPLC-DAD) was investigated. The characteristics of the CSAC were analyzed through X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and Brunauer-Emmett-Teller (BET) method. The effects of the solution pH, eluent type, eluent volume, and flow rate were investigated for optimization of the presented procedure. The adsorption was achieved quantitatively on the CSAC column in the pH range of 2.0–7.0, and then the retained pesticides were eluted with dichloromethane. The detection limit was found to be 0.025–0.039 μg L−1, depending on the pesticide. The proposed SPE-CSAC method was used to determine selected pesticides in tap water samples. The recoveries ranged from 58.2 to 105.3%, with low relative standard deviations. The obtained results indicated that the CSAC could be efficiently used as a low cost alternative to commercially available SPE adsorbents for the determination of the varying polarity pesticides in environmental water samples at trace levels. © 2019, Springer Nature Switzerland AG.
T2  - Water, Air, and Soil Pollution
T1  - Coconut Shell Activated Carbon as Solid-Phase Extraction Adsorbent for Preconcentration of Selected Pesticides from Water Samples
VL  - 230
IS  - 12
SP  - 302
DO  - 10.1007/s11270-019-4359-7
ER  - 

@article{
author = "Kumrić, Ksenija and Vujasin, Radojka and Egerić, Marija and Petrović, Đorđe and Devečerski, Aleksandar and Matović, Ljiljana",
year = "2019",
abstract = "Solid-phase extraction (SPE) on activated carbon derived from coconut shell (CSAC) for the preconcentration of four varying polarity pesticides (imidacloprid, acetamiprid, simazine, and linuron) prior to their determination using high performance liquid chromatography with diode array detector (HPLC-DAD) was investigated. The characteristics of the CSAC were analyzed through X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and Brunauer-Emmett-Teller (BET) method. The effects of the solution pH, eluent type, eluent volume, and flow rate were investigated for optimization of the presented procedure. The adsorption was achieved quantitatively on the CSAC column in the pH range of 2.0–7.0, and then the retained pesticides were eluted with dichloromethane. The detection limit was found to be 0.025–0.039 μg L−1, depending on the pesticide. The proposed SPE-CSAC method was used to determine selected pesticides in tap water samples. The recoveries ranged from 58.2 to 105.3%, with low relative standard deviations. The obtained results indicated that the CSAC could be efficiently used as a low cost alternative to commercially available SPE adsorbents for the determination of the varying polarity pesticides in environmental water samples at trace levels. © 2019, Springer Nature Switzerland AG.",
journal = "Water, Air, and Soil Pollution",
title = "Coconut Shell Activated Carbon as Solid-Phase Extraction Adsorbent for Preconcentration of Selected Pesticides from Water Samples",
volume = "230",
number = "12",
pages = "302",
doi = "10.1007/s11270-019-4359-7"
}

Kumrić, K., Vujasin, R., Egerić, M., Petrović, Đ., Devečerski, A.,& Matović, L.. (2019). Coconut Shell Activated Carbon as Solid-Phase Extraction Adsorbent for Preconcentration of Selected Pesticides from Water Samples. in Water, Air, and Soil Pollution, 230(12), 302.
https://doi.org/10.1007/s11270-019-4359-7

Kumrić K, Vujasin R, Egerić M, Petrović Đ, Devečerski A, Matović L. Coconut Shell Activated Carbon as Solid-Phase Extraction Adsorbent for Preconcentration of Selected Pesticides from Water Samples. in Water, Air, and Soil Pollution. 2019;230(12):302.
doi:10.1007/s11270-019-4359-7 .

Kumrić, Ksenija, Vujasin, Radojka, Egerić, Marija, Petrović, Đorđe, Devečerski, Aleksandar, Matović, Ljiljana, "Coconut Shell Activated Carbon as Solid-Phase Extraction Adsorbent for Preconcentration of Selected Pesticides from Water Samples" in Water, Air, and Soil Pollution, 230, no. 12 (2019):302,
https://doi.org/10.1007/s11270-019-4359-7 . .

TY  - CONF
AU  - Janković, Drina
AU  - Radović, Magdalena
AU  - Mirković, M
AU  - Vukadinović, Aleksandar
AU  - Perić, Marko R.
AU  - Petrović, Đorđe
AU  - Antić, Bratislav
AU  - Vranješ-Đurić, Sanja
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8067
C3  - European Journal of Nuclear Medicine and Molecular Imaging
T1  - Y-90-labeled of phosphates-coated magnetic nanoparticles as a potential tumor treatment radiopharmaceuticals
VL  - 45
IS  - Supp. 1
SP  - S649
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8067
ER  - 

@conference{
author = "Janković, Drina and Radović, Magdalena and Mirković, M and Vukadinović, Aleksandar and Perić, Marko R. and Petrović, Đorđe and Antić, Bratislav and Vranješ-Đurić, Sanja",
year = "2018",
journal = "European Journal of Nuclear Medicine and Molecular Imaging",
title = "Y-90-labeled of phosphates-coated magnetic nanoparticles as a potential tumor treatment radiopharmaceuticals",
volume = "45",
number = "Supp. 1",
pages = "S649",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8067"
}

Janković, D., Radović, M., Mirković, M., Vukadinović, A., Perić, M. R., Petrović, Đ., Antić, B.,& Vranješ-Đurić, S.. (2018). Y-90-labeled of phosphates-coated magnetic nanoparticles as a potential tumor treatment radiopharmaceuticals. in European Journal of Nuclear Medicine and Molecular Imaging, 45(Supp. 1), S649.
https://hdl.handle.net/21.15107/rcub_vinar_8067

Janković D, Radović M, Mirković M, Vukadinović A, Perić MR, Petrović Đ, Antić B, Vranješ-Đurić S. Y-90-labeled of phosphates-coated magnetic nanoparticles as a potential tumor treatment radiopharmaceuticals. in European Journal of Nuclear Medicine and Molecular Imaging. 2018;45(Supp. 1):S649.
https://hdl.handle.net/21.15107/rcub_vinar_8067 .

Janković, Drina, Radović, Magdalena, Mirković, M, Vukadinović, Aleksandar, Perić, Marko R., Petrović, Đorđe, Antić, Bratislav, Vranješ-Đurić, Sanja, "Y-90-labeled of phosphates-coated magnetic nanoparticles as a potential tumor treatment radiopharmaceuticals" in European Journal of Nuclear Medicine and Molecular Imaging, 45, no. Supp. 1 (2018):S649,
https://hdl.handle.net/21.15107/rcub_vinar_8067 .

TY  - THES
AU  - Petrović, Đorđe Ž.
PY  - 2016
UR  - http://eteze.kg.ac.rs/application/showtheses?thesesId=3002
UR  - https://fedorakg.kg.ac.rs/fedora/get/o:673/bdef:Content/download
UR  - http://nardus.mpn.gov.rs/123456789/5616
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7278
AB  - Radiofarmaceutici bazirani na različitim molekulima obeleženimitrijumom-90, se koriste pri tretmanu neoperativnih vrsta tumora, kao i u radijacionoj sinovektomiji. Veliko interesovanje za korišćenje 90Y u terapeutske svrhe potiče zbog njegovih nuklearnih karakteristika (t1/2=64,1, Eβ,max= 2,3 MeV,bez emisije  zračenja). Dostupnost 90Y sa vrlo niskom radiohemijskom kontaminacijom je od suštinske važnosti u terapeutskoj primeni.Postojanje dugoživućeg pretka 90Sr sa vremenom poluživota od 28,9 godina i kratkoživućeg potomka 90Y nam omogućavaju formiranje generatorskog sistema. Iako postoje nekoliko vrsta generatora, prema literaturnim podacima, elektrohemijski generatori i generatori zasnovani na tečnim membranama imaju najveću perspektivu.Membranska ekstrakcija se takođe naziva i pertrakcija i bazirana je natrofaznom sistemu sa organskom fazom (tečna membrana) koja se nalazi između dve vodene faze i predstavlja alternativnu metodu klasičnoj tečno-tečnoj ekstrakciji. Prema literaturnim podacima, koristi se za razdvajanje širokog opsega rastvorenih supstanci uključujući biološke molekule, metalne jone, organske zagađivače i radionuklide.Elektrohemijska metoda je predložena kao rešenje pri separaciji 86Y od 86Sr i dobijanje 86Y koji služi pri pozitronsko emisionoj tomografiji (PET).Literaturni podaci pokazuju da elektrohemijska separacija predstavlja dobro rešenje jer omogućava veliku efikasnost uz minimalnu  kontaminaciju okolnog prostora.Radiofarmaceutici koji se koriste u terapiji su u hemijskom smislukompleksna jedinjenja u kojima se kao centralni joni javljaju radioaktivni izotopi metala sa  ili  raspadom, dok su ligandi organski molekuli koji su sposobni da stvaraju helate. Ovi molekuli pored toga što su helatori za radiometal imaju i ulogu da se vežu za biomolekul. Zbog toga se i nazivaju bifunkcionalni helatori. Najpoznatiji i do sada najviše korišćeni bifunkcionalni helatori u radiohemiji itrijuma su: 1,4,7,10-tetraazociklododekan-1,4,7,10-tetraacetatna kiselina (DOTA) i dietilentriamin-pentasirćetna kiselina (DTPA).Klinička ispitivanja pokazuju da je eliminacija radiofarmaceutika izorganizma uglavnom brza i potpuna. Smatra se i da je metabolička transformacija radiofarmaceutika uglavnom minimalna. Međutim, u određenim uslovima može doći do ispoljavanja toksičnih efekata itrijuma i to kada je eliminacija radiofarmaceutika sprečena ili produžena i kada dolazi do disocijacije radiofarmaceutika. Tada se itrijum raspodeljuje između različitih liganada krvne plazme, prvenstveno, fosfata, karbonata i hidroksida. Biospecijacijazavisi ne samo od prirode radiofarmaceutika već i od prisustva drugihpotencijalnih liganada u krvnoj plazmi kao i neorganskih jona. Premaliteraturnim podacima specijacija i biodistribucija Y(III)-jona u humanoj plazmi, su proučavane u prisustvu ograničenog broja liganada, tako da postoji potreba da se proširi broj liganada koji se koristi prilikom ispitivanja. Tako je, pored već navedenih bifunkcionalnih helatora, u istraživanje uključen i ciprofloksacin, koji predstavlja četvrtu generaciju hinolona aktivnih na Gram-pozitivne bakterije i atipične patogene koji su uzročnici infekcija respiratornog trakta. Kako se Y(III)-jon u organizam unosi kompleksiran ligandima DTPA i DOTA koji se koriste u nuklearnoj medicini potrebno je i njih uključiti prilikom proračuna raspodele ovog jona u humanoj plazmi.Smatra se da je Y(III)-jon u organizmu uglavnom prisutan u obliku svojih hidrolitičkih kompleksa. Odavde može da se zaključi da interakcija Y(III)-jona i liganada u biološkim uslovima predstavlja interakcije sa hidrolitičkim kompleksima itrijuma.U prethodnih trideset godina, hidroliza itrijuma je proučavana povremeno pomoću različitih metoda ali nikada nije sistematski istraženo forimiranje hidrolitičkim kompleksa itrijuma. U literaturi mogu da se nađu pojedinačna ispitivanja hidrolize itrijuma ili termogravimetrijska analiza taloga itrijum-hidroksida, ali ne i podaci o ispitivanju na masenom spektrometru.Potenciometrijske metode daju najkorisnije informacije o vrstamahidrolitičkih komleksa, kao i o njihovim konstantama stabilnosti. Masena spektrometrija nam takođe može dati dosta podataka o vrstama hidrolitičkih kompleksa koje mogu da se jave u rastvorima.Stabilnost komleksa itrijuma sa DTPA, DOTA i ciprofloksacinom se možeodređivati potenciometrijski i masenospektrometrijskim merenjima.Cilj istraživanja ove doktorske teze predstavlja iznalaženje hidrolitičkih vrsta i određivanje njihovih konstati u sistemima koji su kompatibilni sa humanom krvnom plazmom (vodeni rastovor 0,15 mol dm-3 NaCl na 310,0 K). Takođe određivanje konstanti stabilnosti itrijuma sa DTPA i ciprofloksacinom omogućava dobijanje podataka koji se koriste pri specijaciji i određivanju biodistribucije Y(III)-jona u humanoj plazmi.Dobijeni rezultati mogu biti korisni kao osnova za razvoj i razumevanje novih antitumorski aktivnih kompleksa, kao i za razumevanje interakcija između kompleksa prelaznih metala i molekula od biološkog značaja.
AB  - The subject of this dissertation was biospeciation of Y(III) ion in human blood plasma. To this end characterization of complexation equilibria of Y3+ with DTPA, DOTA and ciprofloxacine and production of yttrium-90 from Sr/Y generator was made.Hydrolysis and complexation of yttrium were investigated using potentiometricmesurenment with glass electrode in 0.15 mol dm-3 NaCl ionic medium, at 310.0 ± 0.5 К. In addition, data of the hydrolysis of yttrium (III) ion and complexation of yttrium (III) ion with DTPA and DOTA were obtained by ESI MS technique. Morphologies of various kinds of yttrium-hydroxide precipitates were examined using a scanning electron microscopy. Precipitates were also analyzed by thermogravimetric analysis (TGA) and infrared spectroscopy using KBr pill technique. Computer modeling May model was used for the determination of yttrium species in human plasma and certain dominant yttrium complexes with small molecules. The second part of the Thesis relate to the separation of90Y from 90Sr with high radiochemical yield and purity, that can be used for labelling organic molecules (DTPA and DOTA) which are used in nuclear medicine.The obtained results can be sumarized as follows: The stability constants of hydrolitic complexes (log β,.q) were: Y(OH)2+ (log β1,-1 = -7.71 ± 0.05), Y(OH)2+ (log β1,-2 = -16.42 ± 0.03), Y(OH)3 (log β1,-3 = -26.01± 0.03),Y2(OH)2 4+(log β2,-2 = -14.23± 0.05), Y3(OH)54+ (log β3,-5 = -34.20 ± 0.07) иY4(OH)66+(log β4,-6 = -37.10 ± 0.08). Hydrolytic species determined by potentiometric method were confirmed by ESIMS method also. Hydrolytic species containing tetramer ions with high charges were: [Y4(OH)4(H2O)2]8+, [Y4(OH)2Cl2]8+ и [Y4(OH)3ClH2O]8+. The hydrolytic precipitation reactions with NaOH or urea as precipitating agents were studied. The obtained precipitates were characterized by the X-ray diffraction, the SEM technique, thermal analysis (TG-DSC) and infrared spectroscopy. Powder X-ray diffraction (XRD) characterization indicated that the product, which was obtained by a hydrothermal method, could be indexed to a pure hexagonal phase of Y(OH)3, [space group: P63/m], and no peak shifts and other impurity phases appear. Scanning electron microscopy (SEM) observations indicated that the product was composed of chaotic spread needle particles. These needles were relatively uniform in size length of 8 μm and up to half a micron thick. The thermogravimetric and infrared analysis of the precipitate indicated a adsorbed and crystal water which were lost at higher temperatures. Transformation of the yttrium- hydroxide in yttrium-oxide was made at 873 K. Stability constants of protonated DTPA (log βp.q) were determined bypotentiometric method: HDTPA (logβ1,1 = 9.95±0.02), H2DTPA (logβ1,2 =18.68±0.01), H3DTPA (logβ1,3 = 23.30±0.03), H4DTPA (logβ1,4 = 26.55±0.02) иH5DTPA (logβ1,5 = 29.51±0.03).  Investigation of complexation in the system Y(III)-DTPA indicated that protonated and non-protonated complexes exist in solution with stability constants (log βp.q,r):[YDTPA]2-(logβ1,1,0 = 22.51±0.03) и [YHDTPA]-(logβ1,1,1 = 24.41±0.05). The speciation of Y(III)-ions in human plasma has been studied by computersimulation using the program HySS2006. May’s model that included 43 ligands (26 amino acids, 7 inorganic ligands, 8 carboxylic acids, 2 protein) and 9 metal ions which are dominant in human blood plasma (Ca2+, Mg2+, Zn2+, Pb2+, Mn2+, Fe2+,Fe3+, Zn 2+ and Cu2+) was used. Stability constants of metal ions with ligads were taken from literature. Concentration of yttrium in the model was 1 × 10-9 mol dm-3, which corresponds to the concentration that is used in radionuclide therapy. In normal serum Y(III) ion is bound to citrates (YCit = 47.63 % and YCit2 = 2.98 %)and carbonates (Y(CO3)2 = 32.46 % and Y(CO3) = 10.60 %). Amount ofyttrium bound to oxalate is very small (YOxa = 1.57 %). Increasing the totalconcentrations of yttrium up to 1× 10–8 mol dm–3and 1× 10–7 mol dm–3 complexes of yttrium with citrates are still dominant species with unchanged share of 85.64% and 98.98%. Further increasing concentrations of Y(III) ions from 1× 10–6 mol dm-3 up to 1× 10-3 mol dm-3, leads to appearance of insoluble species of yttriumcarbonates Y2(CO3)3(s)). Separation of yttrium(III) from strontium(II) with 15 % (v/v) di(2-ethylhexyl) phosphoric acid (DEHPA) in dodecane was carried out in a hollow fiber supported liquid membrane (SLM) extraction system operated under closed-loop recirculation of the donor and acceptor phase. The effect of different flow rate of donor and acceptor in the extraction of Sr(II) and Y(III) ions were investigated. Optimal conditions were found (QA = 0.8 cm3 min -1and QD = 4.7 cm3 min-1) when the yield of Y(III) in the acceptor phase reached 60 % after 360 min with a molar ratio of Y(III) to Sr(II) in the acceptor of 250:1, as compared to1:25 in the donor phase. Preparation of 90Y in ,,home-made" 90Sr/90Y generators with defined chemical and radiochemical purity was carried out electrochemicaly in two cycle electrolysis procedure. Quality control of the resulting yttrium is determined by "BARC" technique and subsequently used for labelling DOTATATE. Control of the labeledproduct was performed by HPLC using SepPak C-18 columns.
PB  - Универзитет у Крагујевцу, Природно-математички факултет
T2  - Универзитет у Крагујевцу
T1  - Biospecijacija itrijum(III)-jona i njegovih radiofarmaceutika
UR  - https://hdl.handle.net/21.15107/rcub_nardus_5616
ER  - 

@phdthesis{
author = "Petrović, Đorđe Ž.",
year = "2016",
abstract = "Radiofarmaceutici bazirani na različitim molekulima obeleženimitrijumom-90, se koriste pri tretmanu neoperativnih vrsta tumora, kao i u radijacionoj sinovektomiji. Veliko interesovanje za korišćenje 90Y u terapeutske svrhe potiče zbog njegovih nuklearnih karakteristika (t1/2=64,1, Eβ,max= 2,3 MeV,bez emisije  zračenja). Dostupnost 90Y sa vrlo niskom radiohemijskom kontaminacijom je od suštinske važnosti u terapeutskoj primeni.Postojanje dugoživućeg pretka 90Sr sa vremenom poluživota od 28,9 godina i kratkoživućeg potomka 90Y nam omogućavaju formiranje generatorskog sistema. Iako postoje nekoliko vrsta generatora, prema literaturnim podacima, elektrohemijski generatori i generatori zasnovani na tečnim membranama imaju najveću perspektivu.Membranska ekstrakcija se takođe naziva i pertrakcija i bazirana je natrofaznom sistemu sa organskom fazom (tečna membrana) koja se nalazi između dve vodene faze i predstavlja alternativnu metodu klasičnoj tečno-tečnoj ekstrakciji. Prema literaturnim podacima, koristi se za razdvajanje širokog opsega rastvorenih supstanci uključujući biološke molekule, metalne jone, organske zagađivače i radionuklide.Elektrohemijska metoda je predložena kao rešenje pri separaciji 86Y od 86Sr i dobijanje 86Y koji služi pri pozitronsko emisionoj tomografiji (PET).Literaturni podaci pokazuju da elektrohemijska separacija predstavlja dobro rešenje jer omogućava veliku efikasnost uz minimalnu  kontaminaciju okolnog prostora.Radiofarmaceutici koji se koriste u terapiji su u hemijskom smislukompleksna jedinjenja u kojima se kao centralni joni javljaju radioaktivni izotopi metala sa  ili  raspadom, dok su ligandi organski molekuli koji su sposobni da stvaraju helate. Ovi molekuli pored toga što su helatori za radiometal imaju i ulogu da se vežu za biomolekul. Zbog toga se i nazivaju bifunkcionalni helatori. Najpoznatiji i do sada najviše korišćeni bifunkcionalni helatori u radiohemiji itrijuma su: 1,4,7,10-tetraazociklododekan-1,4,7,10-tetraacetatna kiselina (DOTA) i dietilentriamin-pentasirćetna kiselina (DTPA).Klinička ispitivanja pokazuju da je eliminacija radiofarmaceutika izorganizma uglavnom brza i potpuna. Smatra se i da je metabolička transformacija radiofarmaceutika uglavnom minimalna. Međutim, u određenim uslovima može doći do ispoljavanja toksičnih efekata itrijuma i to kada je eliminacija radiofarmaceutika sprečena ili produžena i kada dolazi do disocijacije radiofarmaceutika. Tada se itrijum raspodeljuje između različitih liganada krvne plazme, prvenstveno, fosfata, karbonata i hidroksida. Biospecijacijazavisi ne samo od prirode radiofarmaceutika već i od prisustva drugihpotencijalnih liganada u krvnoj plazmi kao i neorganskih jona. Premaliteraturnim podacima specijacija i biodistribucija Y(III)-jona u humanoj plazmi, su proučavane u prisustvu ograničenog broja liganada, tako da postoji potreba da se proširi broj liganada koji se koristi prilikom ispitivanja. Tako je, pored već navedenih bifunkcionalnih helatora, u istraživanje uključen i ciprofloksacin, koji predstavlja četvrtu generaciju hinolona aktivnih na Gram-pozitivne bakterije i atipične patogene koji su uzročnici infekcija respiratornog trakta. Kako se Y(III)-jon u organizam unosi kompleksiran ligandima DTPA i DOTA koji se koriste u nuklearnoj medicini potrebno je i njih uključiti prilikom proračuna raspodele ovog jona u humanoj plazmi.Smatra se da je Y(III)-jon u organizmu uglavnom prisutan u obliku svojih hidrolitičkih kompleksa. Odavde može da se zaključi da interakcija Y(III)-jona i liganada u biološkim uslovima predstavlja interakcije sa hidrolitičkim kompleksima itrijuma.U prethodnih trideset godina, hidroliza itrijuma je proučavana povremeno pomoću različitih metoda ali nikada nije sistematski istraženo forimiranje hidrolitičkim kompleksa itrijuma. U literaturi mogu da se nađu pojedinačna ispitivanja hidrolize itrijuma ili termogravimetrijska analiza taloga itrijum-hidroksida, ali ne i podaci o ispitivanju na masenom spektrometru.Potenciometrijske metode daju najkorisnije informacije o vrstamahidrolitičkih komleksa, kao i o njihovim konstantama stabilnosti. Masena spektrometrija nam takođe može dati dosta podataka o vrstama hidrolitičkih kompleksa koje mogu da se jave u rastvorima.Stabilnost komleksa itrijuma sa DTPA, DOTA i ciprofloksacinom se možeodređivati potenciometrijski i masenospektrometrijskim merenjima.Cilj istraživanja ove doktorske teze predstavlja iznalaženje hidrolitičkih vrsta i određivanje njihovih konstati u sistemima koji su kompatibilni sa humanom krvnom plazmom (vodeni rastovor 0,15 mol dm-3 NaCl na 310,0 K). Takođe određivanje konstanti stabilnosti itrijuma sa DTPA i ciprofloksacinom omogućava dobijanje podataka koji se koriste pri specijaciji i određivanju biodistribucije Y(III)-jona u humanoj plazmi.Dobijeni rezultati mogu biti korisni kao osnova za razvoj i razumevanje novih antitumorski aktivnih kompleksa, kao i za razumevanje interakcija između kompleksa prelaznih metala i molekula od biološkog značaja., The subject of this dissertation was biospeciation of Y(III) ion in human blood plasma. To this end characterization of complexation equilibria of Y3+ with DTPA, DOTA and ciprofloxacine and production of yttrium-90 from Sr/Y generator was made.Hydrolysis and complexation of yttrium were investigated using potentiometricmesurenment with glass electrode in 0.15 mol dm-3 NaCl ionic medium, at 310.0 ± 0.5 К. In addition, data of the hydrolysis of yttrium (III) ion and complexation of yttrium (III) ion with DTPA and DOTA were obtained by ESI MS technique. Morphologies of various kinds of yttrium-hydroxide precipitates were examined using a scanning electron microscopy. Precipitates were also analyzed by thermogravimetric analysis (TGA) and infrared spectroscopy using KBr pill technique. Computer modeling May model was used for the determination of yttrium species in human plasma and certain dominant yttrium complexes with small molecules. The second part of the Thesis relate to the separation of90Y from 90Sr with high radiochemical yield and purity, that can be used for labelling organic molecules (DTPA and DOTA) which are used in nuclear medicine.The obtained results can be sumarized as follows: The stability constants of hydrolitic complexes (log β,.q) were: Y(OH)2+ (log β1,-1 = -7.71 ± 0.05), Y(OH)2+ (log β1,-2 = -16.42 ± 0.03), Y(OH)3 (log β1,-3 = -26.01± 0.03),Y2(OH)2 4+(log β2,-2 = -14.23± 0.05), Y3(OH)54+ (log β3,-5 = -34.20 ± 0.07) иY4(OH)66+(log β4,-6 = -37.10 ± 0.08). Hydrolytic species determined by potentiometric method were confirmed by ESIMS method also. Hydrolytic species containing tetramer ions with high charges were: [Y4(OH)4(H2O)2]8+, [Y4(OH)2Cl2]8+ и [Y4(OH)3ClH2O]8+. The hydrolytic precipitation reactions with NaOH or urea as precipitating agents were studied. The obtained precipitates were characterized by the X-ray diffraction, the SEM technique, thermal analysis (TG-DSC) and infrared spectroscopy. Powder X-ray diffraction (XRD) characterization indicated that the product, which was obtained by a hydrothermal method, could be indexed to a pure hexagonal phase of Y(OH)3, [space group: P63/m], and no peak shifts and other impurity phases appear. Scanning electron microscopy (SEM) observations indicated that the product was composed of chaotic spread needle particles. These needles were relatively uniform in size length of 8 μm and up to half a micron thick. The thermogravimetric and infrared analysis of the precipitate indicated a adsorbed and crystal water which were lost at higher temperatures. Transformation of the yttrium- hydroxide in yttrium-oxide was made at 873 K. Stability constants of protonated DTPA (log βp.q) were determined bypotentiometric method: HDTPA (logβ1,1 = 9.95±0.02), H2DTPA (logβ1,2 =18.68±0.01), H3DTPA (logβ1,3 = 23.30±0.03), H4DTPA (logβ1,4 = 26.55±0.02) иH5DTPA (logβ1,5 = 29.51±0.03).  Investigation of complexation in the system Y(III)-DTPA indicated that protonated and non-protonated complexes exist in solution with stability constants (log βp.q,r):[YDTPA]2-(logβ1,1,0 = 22.51±0.03) и [YHDTPA]-(logβ1,1,1 = 24.41±0.05). The speciation of Y(III)-ions in human plasma has been studied by computersimulation using the program HySS2006. May’s model that included 43 ligands (26 amino acids, 7 inorganic ligands, 8 carboxylic acids, 2 protein) and 9 metal ions which are dominant in human blood plasma (Ca2+, Mg2+, Zn2+, Pb2+, Mn2+, Fe2+,Fe3+, Zn 2+ and Cu2+) was used. Stability constants of metal ions with ligads were taken from literature. Concentration of yttrium in the model was 1 × 10-9 mol dm-3, which corresponds to the concentration that is used in radionuclide therapy. In normal serum Y(III) ion is bound to citrates (YCit = 47.63 % and YCit2 = 2.98 %)and carbonates (Y(CO3)2 = 32.46 % and Y(CO3) = 10.60 %). Amount ofyttrium bound to oxalate is very small (YOxa = 1.57 %). Increasing the totalconcentrations of yttrium up to 1× 10–8 mol dm–3and 1× 10–7 mol dm–3 complexes of yttrium with citrates are still dominant species with unchanged share of 85.64% and 98.98%. Further increasing concentrations of Y(III) ions from 1× 10–6 mol dm-3 up to 1× 10-3 mol dm-3, leads to appearance of insoluble species of yttriumcarbonates Y2(CO3)3(s)). Separation of yttrium(III) from strontium(II) with 15 % (v/v) di(2-ethylhexyl) phosphoric acid (DEHPA) in dodecane was carried out in a hollow fiber supported liquid membrane (SLM) extraction system operated under closed-loop recirculation of the donor and acceptor phase. The effect of different flow rate of donor and acceptor in the extraction of Sr(II) and Y(III) ions were investigated. Optimal conditions were found (QA = 0.8 cm3 min -1and QD = 4.7 cm3 min-1) when the yield of Y(III) in the acceptor phase reached 60 % after 360 min with a molar ratio of Y(III) to Sr(II) in the acceptor of 250:1, as compared to1:25 in the donor phase. Preparation of 90Y in ,,home-made" 90Sr/90Y generators with defined chemical and radiochemical purity was carried out electrochemicaly in two cycle electrolysis procedure. Quality control of the resulting yttrium is determined by "BARC" technique and subsequently used for labelling DOTATATE. Control of the labeledproduct was performed by HPLC using SepPak C-18 columns.",
publisher = "Универзитет у Крагујевцу, Природно-математички факултет",
journal = "Универзитет у Крагујевцу",
title = "Biospecijacija itrijum(III)-jona i njegovih radiofarmaceutika",
url = "https://hdl.handle.net/21.15107/rcub_nardus_5616"
}

Petrović, Đ. Ž.. (2016). Biospecijacija itrijum(III)-jona i njegovih radiofarmaceutika. in Универзитет у Крагујевцу
Универзитет у Крагујевцу, Природно-математички факултет..
https://hdl.handle.net/21.15107/rcub_nardus_5616

Petrović ĐŽ. Biospecijacija itrijum(III)-jona i njegovih radiofarmaceutika. in Универзитет у Крагујевцу. 2016;.
https://hdl.handle.net/21.15107/rcub_nardus_5616 .

Petrović, Đorđe Ž., "Biospecijacija itrijum(III)-jona i njegovih radiofarmaceutika" in Универзитет у Крагујевцу (2016),
https://hdl.handle.net/21.15107/rcub_nardus_5616 .

TY  - JOUR
AU  - Petrović, Đorđe
AU  - Jakovljević, Ivan
AU  - Joksović, Ljubinka G.
AU  - Szecsenyi, Katalin Meszaros
AU  - Durdevic, Predrag
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/276
AB  - Hydrolysis reactions of YCl3 aqueous solutions were studied by potentiometric titrations at 310 K in the pH range ca.3-9 and total Y3+ ion concentration range 0.5-10.0 mmol/dm(3). The experimental data were evaluated with the aid of the Hyperquad2006 suite of programs, which indicated the formation of the following hydrolytic complexes (log conc. overall stability constants beta(p,q) defined as beta(p,q) = M-p(OH)(q)[H](q)/[M](p)), Y(OH)(2+) (-7.71(2)); Y(OH)(2)(+) (-16.42(2)); Y(OH)(3) (-26.01(3)); Y-2(OH)(2)(4+) (-14.23(4)); Y-3(OH)(5)(2+) (-34.20 (4)); Y-4(OH)(6)(2+) (-37.10(5)). The hydrolysis of the Y3+ ion was also monitored by electrospray ionization ion-trap mass spectrometry (ESI-MS) in the pH range 2.63-7.10. The influence of the sample cone voltage on the product distribution was significant, indicating the contribution of ion source fragmentation reactions. The optimal cone voltage was set to 70 V for cationic and 100 V for anionic spectra. The cationic and anionic ESI mass spectra of the Y3+ solutions produced strong evidence for the presence of a variety of monomeric and polymeric hydrolytic complexes. The Cl- ion appeared to be a strong competitor to the OH- ion for the oxo-yttrium core. The hydrolytic precipitation reactions with NaOH or urea as precipitating agents were studied. The obtained precipitates were characterized by the potentiometric technique, elemental analysis, thermal analysis (TG-DSC), infrared spectroscopy, X-ray diffractions and the SEM technique. Hydrothermal synthesis of the precipitate in an autoclave at T= 420 K and P = 10 bar with NaOH as the precipitating agent produced a crystalline precipitate in the form of hexagonal needles (P6(3)/m space group). At atmospheric pressure only an amorphous precipitate was produced with both precipitating agents. The concentration solubility product K-so* of Y(OH)(3) was evaluated from the potentiometric titrations curves and logK(so)* = -22.85(4). The synthesized precipitate with NaOH as a precipitating agent had a composition of Y(OH)(3)center dot 2H(2)O, while the amorphous precipitate obtained with urea had a composition of Y-2(OH)(2)(CO3)(2)center dot 3H(2)O. (C) 2015 Elsevier Ltd. All rights reserved.
T2  - Polyhedron
T1  - Study of the hydrolytic properties of the trivalent Y-ion in chloride medium
VL  - 105
SP  - 1
EP  - 11
DO  - 10.1016/j.poly.2015.11.047
ER  - 

@article{
author = "Petrović, Đorđe and Jakovljević, Ivan and Joksović, Ljubinka G. and Szecsenyi, Katalin Meszaros and Durdevic, Predrag",
year = "2016",
abstract = "Hydrolysis reactions of YCl3 aqueous solutions were studied by potentiometric titrations at 310 K in the pH range ca.3-9 and total Y3+ ion concentration range 0.5-10.0 mmol/dm(3). The experimental data were evaluated with the aid of the Hyperquad2006 suite of programs, which indicated the formation of the following hydrolytic complexes (log conc. overall stability constants beta(p,q) defined as beta(p,q) = M-p(OH)(q)[H](q)/[M](p)), Y(OH)(2+) (-7.71(2)); Y(OH)(2)(+) (-16.42(2)); Y(OH)(3) (-26.01(3)); Y-2(OH)(2)(4+) (-14.23(4)); Y-3(OH)(5)(2+) (-34.20 (4)); Y-4(OH)(6)(2+) (-37.10(5)). The hydrolysis of the Y3+ ion was also monitored by electrospray ionization ion-trap mass spectrometry (ESI-MS) in the pH range 2.63-7.10. The influence of the sample cone voltage on the product distribution was significant, indicating the contribution of ion source fragmentation reactions. The optimal cone voltage was set to 70 V for cationic and 100 V for anionic spectra. The cationic and anionic ESI mass spectra of the Y3+ solutions produced strong evidence for the presence of a variety of monomeric and polymeric hydrolytic complexes. The Cl- ion appeared to be a strong competitor to the OH- ion for the oxo-yttrium core. The hydrolytic precipitation reactions with NaOH or urea as precipitating agents were studied. The obtained precipitates were characterized by the potentiometric technique, elemental analysis, thermal analysis (TG-DSC), infrared spectroscopy, X-ray diffractions and the SEM technique. Hydrothermal synthesis of the precipitate in an autoclave at T= 420 K and P = 10 bar with NaOH as the precipitating agent produced a crystalline precipitate in the form of hexagonal needles (P6(3)/m space group). At atmospheric pressure only an amorphous precipitate was produced with both precipitating agents. The concentration solubility product K-so* of Y(OH)(3) was evaluated from the potentiometric titrations curves and logK(so)* = -22.85(4). The synthesized precipitate with NaOH as a precipitating agent had a composition of Y(OH)(3)center dot 2H(2)O, while the amorphous precipitate obtained with urea had a composition of Y-2(OH)(2)(CO3)(2)center dot 3H(2)O. (C) 2015 Elsevier Ltd. All rights reserved.",
journal = "Polyhedron",
title = "Study of the hydrolytic properties of the trivalent Y-ion in chloride medium",
volume = "105",
pages = "1-11",
doi = "10.1016/j.poly.2015.11.047"
}

Petrović, Đ., Jakovljević, I., Joksović, L. G., Szecsenyi, K. M.,& Durdevic, P.. (2016). Study of the hydrolytic properties of the trivalent Y-ion in chloride medium. in Polyhedron, 105, 1-11.
https://doi.org/10.1016/j.poly.2015.11.047

Petrović Đ, Jakovljević I, Joksović LG, Szecsenyi KM, Durdevic P. Study of the hydrolytic properties of the trivalent Y-ion in chloride medium. in Polyhedron. 2016;105:1-11.
doi:10.1016/j.poly.2015.11.047 .

Petrović, Đorđe, Jakovljević, Ivan, Joksović, Ljubinka G., Szecsenyi, Katalin Meszaros, Durdevic, Predrag, "Study of the hydrolytic properties of the trivalent Y-ion in chloride medium" in Polyhedron, 105 (2016):1-11,
https://doi.org/10.1016/j.poly.2015.11.047 . .

TY  - JOUR
AU  - Milicević, Sonja
AU  - Matović, Ljiljana
AU  - Petrović, Đorđe
AU  - Aukic, Andelka
AU  - Milošević, Vladan
AU  - Dokic, Divna
AU  - Kumrić, Ksenija
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1270
AB  - Natural clinoptilolite modified with a cationic surfactant stearyldimethylbenzylammonium chloride (SDBAC) was used as an adsorbent for the removal of pertechnetate from aqueous solutions. Adsorption studies were performed in a batch system. The effects of various experimental parameters (amount of surfactant loading, contact time, solution pH, competing anions) on the removal efficiency of TcO4 (-) were investigated. SDBAC-clinoptilolite with organo-bilayer was successfully used to remove TcO4 (-) from aqueous solutions in the pH range of 5.0-8.0. ReO4 (-) as an analogue of TcO4 (-) was used to model the isotherms. Adsorption capacity of the SDBAC-clinoptilolite and the mechanism of ReO4 (-) (TcO4 (-)) sorption were also determined.
T2  - Journal of Radioanalytical and Nuclear Chemistry
T1  - Surfactant modification and adsorption properties of clinoptilolite for the removal of pertechnetate from aqueous solutions
VL  - 310
IS  - 2
SP  - 805
EP  - 815
DO  - 10.1007/s10967-016-4850-1
ER  - 

@article{
author = "Milicević, Sonja and Matović, Ljiljana and Petrović, Đorđe and Aukic, Andelka and Milošević, Vladan and Dokic, Divna and Kumrić, Ksenija",
year = "2016",
abstract = "Natural clinoptilolite modified with a cationic surfactant stearyldimethylbenzylammonium chloride (SDBAC) was used as an adsorbent for the removal of pertechnetate from aqueous solutions. Adsorption studies were performed in a batch system. The effects of various experimental parameters (amount of surfactant loading, contact time, solution pH, competing anions) on the removal efficiency of TcO4 (-) were investigated. SDBAC-clinoptilolite with organo-bilayer was successfully used to remove TcO4 (-) from aqueous solutions in the pH range of 5.0-8.0. ReO4 (-) as an analogue of TcO4 (-) was used to model the isotherms. Adsorption capacity of the SDBAC-clinoptilolite and the mechanism of ReO4 (-) (TcO4 (-)) sorption were also determined.",
journal = "Journal of Radioanalytical and Nuclear Chemistry",
title = "Surfactant modification and adsorption properties of clinoptilolite for the removal of pertechnetate from aqueous solutions",
volume = "310",
number = "2",
pages = "805-815",
doi = "10.1007/s10967-016-4850-1"
}

Milicević, S., Matović, L., Petrović, Đ., Aukic, A., Milošević, V., Dokic, D.,& Kumrić, K.. (2016). Surfactant modification and adsorption properties of clinoptilolite for the removal of pertechnetate from aqueous solutions. in Journal of Radioanalytical and Nuclear Chemistry, 310(2), 805-815.
https://doi.org/10.1007/s10967-016-4850-1

Milicević S, Matović L, Petrović Đ, Aukic A, Milošević V, Dokic D, Kumrić K. Surfactant modification and adsorption properties of clinoptilolite for the removal of pertechnetate from aqueous solutions. in Journal of Radioanalytical and Nuclear Chemistry. 2016;310(2):805-815.
doi:10.1007/s10967-016-4850-1 .

Milicević, Sonja, Matović, Ljiljana, Petrović, Đorđe, Aukic, Andelka, Milošević, Vladan, Dokic, Divna, Kumrić, Ksenija, "Surfactant modification and adsorption properties of clinoptilolite for the removal of pertechnetate from aqueous solutions" in Journal of Radioanalytical and Nuclear Chemistry, 310, no. 2 (2016):805-815,
https://doi.org/10.1007/s10967-016-4850-1 . .

TY  - JOUR
AU  - Petrović, Đorđe
AU  - Trtić-Petrović, Tatjana M.
AU  - Vladisavljević, Goran T.
AU  - Stoiljković, Milovan
AU  - Slavković-Beškoski, Latinka J.
AU  - Kumrić, Ksenija
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/562
AB  - Separation of yttrium(III) from strontium(II) with 15% (v/v) di(2-ethylhexyl)phosphoric acid (DEHPA) in dodecane was carried out in a hollow fiber supported liquid membrane (SLM) extraction system operated under closed-loop recirculation of the donor and acceptor phase. The donor phase was a mixture of 5.7 mmol dm(-3) of Sr(II) and 0.23 mmol dm(-3) of Y(III) in 0.1 mol dm(-3) HCl, the acceptor solution was 3 mol dm(-3) HCl, and the donor to acceptor phase volume ratio was 6.2. At the donor flow rate of 4.7 cm(3) min(-1) and the acceptor flow rate of 0.8 cm(3) min(-1), the yield of Y(III) in the acceptor phase (in the form suitable for radiopharmaceutical preparation) reached 60% after 360 min with a molar ratio of Y(III) to Sr(II) in the acceptor of 250:1, as compared to 1:25 in the donor phase. The yield of Y(III) was 72% at the acceptor flow rate to 1.9 cm3 min(-1), but a breakthrough of Sr(II) through liquid membrane increased from 0.02 to 0.2%. (C) 2015 The Institution a Chemical Engineers. Published by Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Research and Design
T1  - Novel Sr-90-Y-90 generator system based on a pertraction through supported liquid membrane in hollow fiber contactor
VL  - 97
SP  - 57
EP  - 67
DO  - 10.1016/j.cherd.2015.03.015
ER  - 

@article{
author = "Petrović, Đorđe and Trtić-Petrović, Tatjana M. and Vladisavljević, Goran T. and Stoiljković, Milovan and Slavković-Beškoski, Latinka J. and Kumrić, Ksenija",
year = "2015",
abstract = "Separation of yttrium(III) from strontium(II) with 15% (v/v) di(2-ethylhexyl)phosphoric acid (DEHPA) in dodecane was carried out in a hollow fiber supported liquid membrane (SLM) extraction system operated under closed-loop recirculation of the donor and acceptor phase. The donor phase was a mixture of 5.7 mmol dm(-3) of Sr(II) and 0.23 mmol dm(-3) of Y(III) in 0.1 mol dm(-3) HCl, the acceptor solution was 3 mol dm(-3) HCl, and the donor to acceptor phase volume ratio was 6.2. At the donor flow rate of 4.7 cm(3) min(-1) and the acceptor flow rate of 0.8 cm(3) min(-1), the yield of Y(III) in the acceptor phase (in the form suitable for radiopharmaceutical preparation) reached 60% after 360 min with a molar ratio of Y(III) to Sr(II) in the acceptor of 250:1, as compared to 1:25 in the donor phase. The yield of Y(III) was 72% at the acceptor flow rate to 1.9 cm3 min(-1), but a breakthrough of Sr(II) through liquid membrane increased from 0.02 to 0.2%. (C) 2015 The Institution a Chemical Engineers. Published by Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Research and Design",
title = "Novel Sr-90-Y-90 generator system based on a pertraction through supported liquid membrane in hollow fiber contactor",
volume = "97",
pages = "57-67",
doi = "10.1016/j.cherd.2015.03.015"
}

Petrović, Đ., Trtić-Petrović, T. M., Vladisavljević, G. T., Stoiljković, M., Slavković-Beškoski, L. J.,& Kumrić, K.. (2015). Novel Sr-90-Y-90 generator system based on a pertraction through supported liquid membrane in hollow fiber contactor. in Chemical Engineering Research and Design, 97, 57-67.
https://doi.org/10.1016/j.cherd.2015.03.015

Petrović Đ, Trtić-Petrović TM, Vladisavljević GT, Stoiljković M, Slavković-Beškoski LJ, Kumrić K. Novel Sr-90-Y-90 generator system based on a pertraction through supported liquid membrane in hollow fiber contactor. in Chemical Engineering Research and Design. 2015;97:57-67.
doi:10.1016/j.cherd.2015.03.015 .

Petrović, Đorđe, Trtić-Petrović, Tatjana M., Vladisavljević, Goran T., Stoiljković, Milovan, Slavković-Beškoski, Latinka J., Kumrić, Ksenija, "Novel Sr-90-Y-90 generator system based on a pertraction through supported liquid membrane in hollow fiber contactor" in Chemical Engineering Research and Design, 97 (2015):57-67,
https://doi.org/10.1016/j.cherd.2015.03.015 . .