TY  - JOUR
AU  - Egerić, Marija
AU  - Matović, Ljiljana
AU  - Savić, Marjetka
AU  - Stanković, Srboljub
AU  - Wu, Yi-nan
AU  - Li, Fengting
AU  - Vujasin, Radojka
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/13025
AB  - Different organic compounds in aquatic bodies have been recognized as an emerging issue in Environmental Chemistry. The gamma irradiation technique, as one of the advanced oxidation techniques, has been widely investigated in past decades as a technique for the degradation of organic molecules, such as dyes, pesticides, and pharmaceuticals, which show high persistence to degradation. This review gives an overview of what has been achieved so far using gamma irradiation for different organic compound degradations giving an explanation of the mechanisms of degradations as well as the corresponding limitations and drawbacks, and the answer to why this technique has not yet widely come to life. Also, a new approach, recently presented in the literature, regards coupling gamma irradiation with other techniques and materials, as the latest trend. A critical evaluation of the most recent advances achieved by coupling gamma irradiation with other methods and/or materials, as well as describing the reaction mechanisms of coupling, that is, additional destabilization of molecules achieved by coupling, emphasizing the advantages of the newly proposed approach. Finally, it was concluded what are the perspectives and future directions towards its commercialization since this technique can contribute to waste minimization i.e. not waste transfer to other media. Summarizing and generalization the model of radiolytic degradation with and without coupling with other techniques can further guide designing a new modular, mobile method that will satisfy all the needs for its wide commercial application.
T2  - Chemosphere
T1  - Gamma irradiation induced degradation of organic pollutants: Recent advances and future perspective
VL  - 352
SP  - 141437
DO  - 10.1016/j.chemosphere.2024.141437
ER  - 

@article{
author = "Egerić, Marija and Matović, Ljiljana and Savić, Marjetka and Stanković, Srboljub and Wu, Yi-nan and Li, Fengting and Vujasin, Radojka",
year = "2024",
abstract = "Different organic compounds in aquatic bodies have been recognized as an emerging issue in Environmental Chemistry. The gamma irradiation technique, as one of the advanced oxidation techniques, has been widely investigated in past decades as a technique for the degradation of organic molecules, such as dyes, pesticides, and pharmaceuticals, which show high persistence to degradation. This review gives an overview of what has been achieved so far using gamma irradiation for different organic compound degradations giving an explanation of the mechanisms of degradations as well as the corresponding limitations and drawbacks, and the answer to why this technique has not yet widely come to life. Also, a new approach, recently presented in the literature, regards coupling gamma irradiation with other techniques and materials, as the latest trend. A critical evaluation of the most recent advances achieved by coupling gamma irradiation with other methods and/or materials, as well as describing the reaction mechanisms of coupling, that is, additional destabilization of molecules achieved by coupling, emphasizing the advantages of the newly proposed approach. Finally, it was concluded what are the perspectives and future directions towards its commercialization since this technique can contribute to waste minimization i.e. not waste transfer to other media. Summarizing and generalization the model of radiolytic degradation with and without coupling with other techniques can further guide designing a new modular, mobile method that will satisfy all the needs for its wide commercial application.",
journal = "Chemosphere",
title = "Gamma irradiation induced degradation of organic pollutants: Recent advances and future perspective",
volume = "352",
pages = "141437",
doi = "10.1016/j.chemosphere.2024.141437"
}

Egerić, M., Matović, L., Savić, M., Stanković, S., Wu, Y., Li, F.,& Vujasin, R.. (2024). Gamma irradiation induced degradation of organic pollutants: Recent advances and future perspective. in Chemosphere, 352, 141437.
https://doi.org/10.1016/j.chemosphere.2024.141437

Egerić M, Matović L, Savić M, Stanković S, Wu Y, Li F, Vujasin R. Gamma irradiation induced degradation of organic pollutants: Recent advances and future perspective. in Chemosphere. 2024;352:141437.
doi:10.1016/j.chemosphere.2024.141437 .

Egerić, Marija, Matović, Ljiljana, Savić, Marjetka, Stanković, Srboljub, Wu, Yi-nan, Li, Fengting, Vujasin, Radojka, "Gamma irradiation induced degradation of organic pollutants: Recent advances and future perspective" in Chemosphere, 352 (2024):141437,
https://doi.org/10.1016/j.chemosphere.2024.141437 . .

TY  - CONF
AU  - Krstić, Sanja
AU  - Dodevski, Vladimir
AU  - Čebela, Maria
AU  - Rosić, Milena
AU  - Egerić, Marija
AU  - Vujasin, Radojka
AU  - Jaćimovski, Darko
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11485
AB  - The main aim of this research is to show influence of different hydroxides, applied in carbon materials activation process on the electrochemical properties of activated carbon samples. The carbon material samples were prepared by hydrothermal treatment of sucrose and thermally activated using KOH, NaOH and LiOH by chemical activation method. The electrochemical properties of the obtained carbon material samples were examined by cyclic voltammetry and electrochemical impedance spectroscopy and correlated to their physicochemical properties. Investigated samples showed characteristic capacitor-like behavior. The best result of specific capacitance was obtained for the sample synthesized treated by KOH, while the increase in capacitance follows the arrangement of the growth of ionic radius of a metal from an alkali which is used for activation. Dependence on the type of hydroxide is due to differences in the radii of a metal. The alkalis with larger radii of metal produce wider pores and consequently the structure of a porous layer become more accessible and available to the charge transfer of capacitive response.
PB  - Belgrade : University of Belgrade, Institute for Multidisciplinary Research
C3  - Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade
T1  - Supercapacitive properties of carbon materials activated by alkali metal hydroxides obtained from sucrose
SP  - 102
EP  - 102
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11485
ER  - 

@conference{
author = "Krstić, Sanja and Dodevski, Vladimir and Čebela, Maria and Rosić, Milena and Egerić, Marija and Vujasin, Radojka and Jaćimovski, Darko",
year = "2023",
abstract = "The main aim of this research is to show influence of different hydroxides, applied in carbon materials activation process on the electrochemical properties of activated carbon samples. The carbon material samples were prepared by hydrothermal treatment of sucrose and thermally activated using KOH, NaOH and LiOH by chemical activation method. The electrochemical properties of the obtained carbon material samples were examined by cyclic voltammetry and electrochemical impedance spectroscopy and correlated to their physicochemical properties. Investigated samples showed characteristic capacitor-like behavior. The best result of specific capacitance was obtained for the sample synthesized treated by KOH, while the increase in capacitance follows the arrangement of the growth of ionic radius of a metal from an alkali which is used for activation. Dependence on the type of hydroxide is due to differences in the radii of a metal. The alkalis with larger radii of metal produce wider pores and consequently the structure of a porous layer become more accessible and available to the charge transfer of capacitive response.",
publisher = "Belgrade : University of Belgrade, Institute for Multidisciplinary Research",
journal = "Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade",
title = "Supercapacitive properties of carbon materials activated by alkali metal hydroxides obtained from sucrose",
pages = "102-102",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11485"
}

Krstić, S., Dodevski, V., Čebela, M., Rosić, M., Egerić, M., Vujasin, R.,& Jaćimovski, D.. (2023). Supercapacitive properties of carbon materials activated by alkali metal hydroxides obtained from sucrose. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade
Belgrade : University of Belgrade, Institute for Multidisciplinary Research., 102-102.
https://hdl.handle.net/21.15107/rcub_vinar_11485

Krstić S, Dodevski V, Čebela M, Rosić M, Egerić M, Vujasin R, Jaćimovski D. Supercapacitive properties of carbon materials activated by alkali metal hydroxides obtained from sucrose. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade. 2023;:102-102.
https://hdl.handle.net/21.15107/rcub_vinar_11485 .

Krstić, Sanja, Dodevski, Vladimir, Čebela, Maria, Rosić, Milena, Egerić, Marija, Vujasin, Radojka, Jaćimovski, Darko, "Supercapacitive properties of carbon materials activated by alkali metal hydroxides obtained from sucrose" in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade (2023):102-102,
https://hdl.handle.net/21.15107/rcub_vinar_11485 .

TY  - CONF
AU  - Matović, Ljiljana
AU  - Egerić, Marija
AU  - Kolarić, Ljubiša
AU  - Petrović, Dimitrije
AU  - Savić-Biserčić, Marjetka
AU  - Stanković, Srboljub
AU  - Vujasin, Radojka
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12253
AB  - Worldwide water bodies have been affected by toxic effluents of industries, such as organic compounds, and are continuously deteriorating the environment as industrialization coupled with urbanization has caused the excess release of wastewater. Finding a proper wastewater treatment is of the greatest importance. Gamma irradiation technique, as one of the advanced oxidation techniques, has been widely investigated as a technique for degradation of organic molecules. It has been shown that this method has the potential to be effectively applied for degradation of toxic colorants which show high persistence to degradation. Although the literature abounds with degradation studies of different organic molecules using a wide range of irradiation dozes and doze rates, according to available data, no such irradiation facility exists, mostly due to high doses and expensive equipment needed to be installed. A mechanism of degradation was proposed: generated reactive species non-specifically react with organic compounds leading to their partial or complete degradation. In recent advances, gamma irradiation was coupled with other wastewater treatment technologies to reduce needed doses. Coupling of gamma irradiation was achieved with addition of oxidants which resulted in increased number of reactive species, then coupling with solid matrices, biological treatment, which all lead to additional destabilization of organic molecules. This way, combining different methods of wastewater purification opens new possibilities and may enable the design of a new modular, or even mobile, plant that will satisfy all the needs for its wide commercial application. As a result, a sustainable development goal can be more easily reachable, i.e., sustainable water resources management in future industrial zones and smart cities may be possible without generation of waste transfer into another media.
PB  - Leskovac : Faculty of Technology, University of Niš
C3  - 15th International symposium „Novel technologies and sustainable development" : Book of Abstracts
T1  - Degradation of Organic Pollutants by Gamma Irradiation: Future Perspective
SP  - 116
EP  - 116
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12253
ER  - 

@conference{
author = "Matović, Ljiljana and Egerić, Marija and Kolarić, Ljubiša and Petrović, Dimitrije and Savić-Biserčić, Marjetka and Stanković, Srboljub and Vujasin, Radojka",
year = "2023",
abstract = "Worldwide water bodies have been affected by toxic effluents of industries, such as organic compounds, and are continuously deteriorating the environment as industrialization coupled with urbanization has caused the excess release of wastewater. Finding a proper wastewater treatment is of the greatest importance. Gamma irradiation technique, as one of the advanced oxidation techniques, has been widely investigated as a technique for degradation of organic molecules. It has been shown that this method has the potential to be effectively applied for degradation of toxic colorants which show high persistence to degradation. Although the literature abounds with degradation studies of different organic molecules using a wide range of irradiation dozes and doze rates, according to available data, no such irradiation facility exists, mostly due to high doses and expensive equipment needed to be installed. A mechanism of degradation was proposed: generated reactive species non-specifically react with organic compounds leading to their partial or complete degradation. In recent advances, gamma irradiation was coupled with other wastewater treatment technologies to reduce needed doses. Coupling of gamma irradiation was achieved with addition of oxidants which resulted in increased number of reactive species, then coupling with solid matrices, biological treatment, which all lead to additional destabilization of organic molecules. This way, combining different methods of wastewater purification opens new possibilities and may enable the design of a new modular, or even mobile, plant that will satisfy all the needs for its wide commercial application. As a result, a sustainable development goal can be more easily reachable, i.e., sustainable water resources management in future industrial zones and smart cities may be possible without generation of waste transfer into another media.",
publisher = "Leskovac : Faculty of Technology, University of Niš",
journal = "15th International symposium „Novel technologies and sustainable development" : Book of Abstracts",
title = "Degradation of Organic Pollutants by Gamma Irradiation: Future Perspective",
pages = "116-116",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12253"
}

Matović, L., Egerić, M., Kolarić, L., Petrović, D., Savić-Biserčić, M., Stanković, S.,& Vujasin, R.. (2023). Degradation of Organic Pollutants by Gamma Irradiation: Future Perspective. in 15th International symposium „Novel technologies and sustainable development" : Book of Abstracts
Leskovac : Faculty of Technology, University of Niš., 116-116.
https://hdl.handle.net/21.15107/rcub_vinar_12253

Matović L, Egerić M, Kolarić L, Petrović D, Savić-Biserčić M, Stanković S, Vujasin R. Degradation of Organic Pollutants by Gamma Irradiation: Future Perspective. in 15th International symposium „Novel technologies and sustainable development" : Book of Abstracts. 2023;:116-116.
https://hdl.handle.net/21.15107/rcub_vinar_12253 .

Matović, Ljiljana, Egerić, Marija, Kolarić, Ljubiša, Petrović, Dimitrije, Savić-Biserčić, Marjetka, Stanković, Srboljub, Vujasin, Radojka, "Degradation of Organic Pollutants by Gamma Irradiation: Future Perspective" in 15th International symposium „Novel technologies and sustainable development" : Book of Abstracts (2023):116-116,
https://hdl.handle.net/21.15107/rcub_vinar_12253 .

TY  - CONF
AU  - Egerić, Marija
AU  - Nešić, Aleksandra
AU  - Pilić, Branka
AU  - Wu, Yi-nan
AU  - Devečerski, Aleksandar
AU  - Vujasin, Radojka
AU  - Matović, Ljiljana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12251
AB  - Pollution of the environment is a serious issue nowadays, and finding a proper wastewater treatment is only small part of challenges that humans are facing. In order to find innovative ways for wastewater treatment, different techniques are applied, which lead to the production of new materials, such as ones made of polymeric nanofibers and materials with photocatalytic properties. In this study, nanofibers composite, synthetized from polyamide (PA) and UiO-66 Metal Organic Framework (MOF) by electrospinning method was used for degradation of Congo red dye from 10 ppm aqueous solution in batch conditions. Ultra-thin PA nanofiber membranes were produced with different ratios of MOF - 0.5 wt.%, 1 wt.%, 2 wt.% and 10 wt.% and prior the experiments, in order to be easily applied and removed from the solution, cut in the rectangular shape 1cm x 2 cm. FTIR, XRD and SEM are used for characterization of selected composites, prior and after sorption and photocatalytic experiments, while for determination of dye concentration UV-ViS spectrophotometer was used. The best performance in Congo red degradation was shown by membranes which contained 1 wt.% of MOF. FTIR spectra have shown that, upon the introduction of MOF particles into the PA fiber, reduction of all the peaks by the same amount in intensity indicates no interaction between MOF additive and PA matrix. Further, a new peak appeared after sorption at 590 cm-1 and disappeared after dye degradation induced by sun irradiation. XRD analysis has shown that there are no observable microstructural changes in composites upon sorption and cycling. Decreasing of the band gap of composite compared to pure MOF indicated increased photocatalytic activity. Reusability of composite membranes was investigated by performing experiments in multiple cycles, and results have shown that electrospun UiO-66/polyamide membranes have no significant changes in degradation efficiency of Congo red upon 4 cycles.
PB  - Leskovac : Faculty of Technology, University of Niš
C3  - 15th International symposium „Novel technologies and sustainable development" : Book of Abstracts
T1  - Mechanism of Congo Red Dye Photocatalytic Degradation on Metal Organic Framework/Polyamide Electrospun Nanofiber
SP  - 98
EP  - 98
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12251
ER  - 

@conference{
author = "Egerić, Marija and Nešić, Aleksandra and Pilić, Branka and Wu, Yi-nan and Devečerski, Aleksandar and Vujasin, Radojka and Matović, Ljiljana",
year = "2023",
abstract = "Pollution of the environment is a serious issue nowadays, and finding a proper wastewater treatment is only small part of challenges that humans are facing. In order to find innovative ways for wastewater treatment, different techniques are applied, which lead to the production of new materials, such as ones made of polymeric nanofibers and materials with photocatalytic properties. In this study, nanofibers composite, synthetized from polyamide (PA) and UiO-66 Metal Organic Framework (MOF) by electrospinning method was used for degradation of Congo red dye from 10 ppm aqueous solution in batch conditions. Ultra-thin PA nanofiber membranes were produced with different ratios of MOF - 0.5 wt.%, 1 wt.%, 2 wt.% and 10 wt.% and prior the experiments, in order to be easily applied and removed from the solution, cut in the rectangular shape 1cm x 2 cm. FTIR, XRD and SEM are used for characterization of selected composites, prior and after sorption and photocatalytic experiments, while for determination of dye concentration UV-ViS spectrophotometer was used. The best performance in Congo red degradation was shown by membranes which contained 1 wt.% of MOF. FTIR spectra have shown that, upon the introduction of MOF particles into the PA fiber, reduction of all the peaks by the same amount in intensity indicates no interaction between MOF additive and PA matrix. Further, a new peak appeared after sorption at 590 cm-1 and disappeared after dye degradation induced by sun irradiation. XRD analysis has shown that there are no observable microstructural changes in composites upon sorption and cycling. Decreasing of the band gap of composite compared to pure MOF indicated increased photocatalytic activity. Reusability of composite membranes was investigated by performing experiments in multiple cycles, and results have shown that electrospun UiO-66/polyamide membranes have no significant changes in degradation efficiency of Congo red upon 4 cycles.",
publisher = "Leskovac : Faculty of Technology, University of Niš",
journal = "15th International symposium „Novel technologies and sustainable development" : Book of Abstracts",
title = "Mechanism of Congo Red Dye Photocatalytic Degradation on Metal Organic Framework/Polyamide Electrospun Nanofiber",
pages = "98-98",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12251"
}

Egerić, M., Nešić, A., Pilić, B., Wu, Y., Devečerski, A., Vujasin, R.,& Matović, L.. (2023). Mechanism of Congo Red Dye Photocatalytic Degradation on Metal Organic Framework/Polyamide Electrospun Nanofiber. in 15th International symposium „Novel technologies and sustainable development" : Book of Abstracts
Leskovac : Faculty of Technology, University of Niš., 98-98.
https://hdl.handle.net/21.15107/rcub_vinar_12251

Egerić M, Nešić A, Pilić B, Wu Y, Devečerski A, Vujasin R, Matović L. Mechanism of Congo Red Dye Photocatalytic Degradation on Metal Organic Framework/Polyamide Electrospun Nanofiber. in 15th International symposium „Novel technologies and sustainable development" : Book of Abstracts. 2023;:98-98.
https://hdl.handle.net/21.15107/rcub_vinar_12251 .

Egerić, Marija, Nešić, Aleksandra, Pilić, Branka, Wu, Yi-nan, Devečerski, Aleksandar, Vujasin, Radojka, Matović, Ljiljana, "Mechanism of Congo Red Dye Photocatalytic Degradation on Metal Organic Framework/Polyamide Electrospun Nanofiber" in 15th International symposium „Novel technologies and sustainable development" : Book of Abstracts (2023):98-98,
https://hdl.handle.net/21.15107/rcub_vinar_12251 .

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  - Krstić, Sanja
AU  - Kaluđerović, Branka
AU  - Dodevski, Vladimir
AU  - Čebela, Maria
AU  - Košević, Milica
AU  - Devečerski, Aleksandar
AU  - Vujasin, Radojka
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11506
AB  - In presented work, influence of temperature, starting material concentration and
different hydroxides on properties and morphology of activated carbon obtained
from saccharose were investigated. The samples were prepared by hydrothermal
treatment and activated using KOH, NaOH and LiOH. Two saccharose
concentrations (0.5, 1.0 mol/dm3
) and three different temperatures (160, 200, 240
°C) were changed in hydrothermal treatment. Activation processes were performed
at 750 °C under inert atmosphere. Obtained samples were characterized by X–ray
powder diffractometry, elemental analysis, N2 adsorption-desorption measurements,
Fourier–transform infrared spectrometry, scanning electron microscopy and thermal
analysis. The obtained samples were tested for potential application in dyes removal
(Methylene Blue and Methyl Orange) from water solutions.
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  - Hydrothermal synthesis, characterization and application of activated carbon materials obtained from saccharides
SP  - 66
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11506
ER  - 

@conference{
author = "Krstić, Sanja and Kaluđerović, Branka and Dodevski, Vladimir and Čebela, Maria and Košević, Milica and Devečerski, Aleksandar and Vujasin, Radojka",
year = "2022",
abstract = "In presented work, influence of temperature, starting material concentration and
different hydroxides on properties and morphology of activated carbon obtained
from saccharose were investigated. The samples were prepared by hydrothermal
treatment and activated using KOH, NaOH and LiOH. Two saccharose
concentrations (0.5, 1.0 mol/dm3
) and three different temperatures (160, 200, 240
°C) were changed in hydrothermal treatment. Activation processes were performed
at 750 °C under inert atmosphere. Obtained samples were characterized by X–ray
powder diffractometry, elemental analysis, N2 adsorption-desorption measurements,
Fourier–transform infrared spectrometry, scanning electron microscopy and thermal
analysis. The obtained samples were tested for potential application in dyes removal
(Methylene Blue and Methyl Orange) from water solutions.",
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 = "Hydrothermal synthesis, characterization and application of activated carbon materials obtained from saccharides",
pages = "66",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11506"
}

Krstić, S., Kaluđerović, B., Dodevski, V., Čebela, M., Košević, M., Devečerski, A.,& Vujasin, R.. (2022). Hydrothermal synthesis, characterization and application of activated carbon materials obtained from saccharides. in 6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade
University of Belgrade : Institute for Multidisciplinary Research., 66.
https://hdl.handle.net/21.15107/rcub_vinar_11506

Krstić S, Kaluđerović B, Dodevski V, Čebela M, Košević M, Devečerski A, Vujasin R. Hydrothermal synthesis, characterization and application of activated carbon materials obtained from saccharides. in 6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade. 2022;:66.
https://hdl.handle.net/21.15107/rcub_vinar_11506 .

Krstić, Sanja, Kaluđerović, Branka, Dodevski, Vladimir, Čebela, Maria, Košević, Milica, Devečerski, Aleksandar, Vujasin, Radojka, "Hydrothermal synthesis, characterization and application of activated carbon materials obtained from saccharides" in 6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade (2022):66,
https://hdl.handle.net/21.15107/rcub_vinar_11506 .

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  - JOUR
AU  - Omerašević, Mia
AU  - Baščarević, Zvezdana D.
AU  - Vujasin, Radojka
AU  - Devečerski, Aleksandar
AU  - Bučevac, Dušan
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10432
AB  - Anorthite ceramics was fabricated from calcium exchanged Na-LTA zeolite. The powder compacts of Ca-LTA zeolite were sintered at different temperatures ranging between 1100 and 1400°C. It was found that the temperature of 1100°C was sufficiently high to trigger formation of anorthite which stayed stable even at temperature as high as 1400°C. The highest relative density and the lowest open porosity were measured in samples sintered at 1200°C for 3 h. The effect of milling time of Ca-LTA zeolite precursor on density, microstructure and mechanical properties of samples sintered at 1200°C for 3 h was investigated. The particle size refinement appeared to be beneficial in accelerating densification process and improving mechanical properties. The density, compressive strength and hardness of anorthite ceramics obtained from non-milled precursor were measured to be 70.5 %TD, 64 MPa and 1.45 GPa, respectively. On the other side the anorthite ceramics obtained from 24-hour-long milled zeolite precursor had density of 83.9 %TD, compressive strength of 101 MPa and hardness of 3.44 GPa.
T2  - Science of Sintering
T1  - Effect of Milling Time on Mechanical Properties of Anorthite Obtained by Thermal Transformation of Ca-LTA Zeolite
VL  - 54
IS  - 3
SP  - 349
EP  - 358
DO  - 10.2298/SOS2203349O
ER  - 

@article{
author = "Omerašević, Mia and Baščarević, Zvezdana D. and Vujasin, Radojka and Devečerski, Aleksandar and Bučevac, Dušan",
year = "2022",
abstract = "Anorthite ceramics was fabricated from calcium exchanged Na-LTA zeolite. The powder compacts of Ca-LTA zeolite were sintered at different temperatures ranging between 1100 and 1400°C. It was found that the temperature of 1100°C was sufficiently high to trigger formation of anorthite which stayed stable even at temperature as high as 1400°C. The highest relative density and the lowest open porosity were measured in samples sintered at 1200°C for 3 h. The effect of milling time of Ca-LTA zeolite precursor on density, microstructure and mechanical properties of samples sintered at 1200°C for 3 h was investigated. The particle size refinement appeared to be beneficial in accelerating densification process and improving mechanical properties. The density, compressive strength and hardness of anorthite ceramics obtained from non-milled precursor were measured to be 70.5 %TD, 64 MPa and 1.45 GPa, respectively. On the other side the anorthite ceramics obtained from 24-hour-long milled zeolite precursor had density of 83.9 %TD, compressive strength of 101 MPa and hardness of 3.44 GPa.",
journal = "Science of Sintering",
title = "Effect of Milling Time on Mechanical Properties of Anorthite Obtained by Thermal Transformation of Ca-LTA Zeolite",
volume = "54",
number = "3",
pages = "349-358",
doi = "10.2298/SOS2203349O"
}

Omerašević, M., Baščarević, Z. D., Vujasin, R., Devečerski, A.,& Bučevac, D.. (2022). Effect of Milling Time on Mechanical Properties of Anorthite Obtained by Thermal Transformation of Ca-LTA Zeolite. in Science of Sintering, 54(3), 349-358.
https://doi.org/10.2298/SOS2203349O

Omerašević M, Baščarević ZD, Vujasin R, Devečerski A, Bučevac D. Effect of Milling Time on Mechanical Properties of Anorthite Obtained by Thermal Transformation of Ca-LTA Zeolite. in Science of Sintering. 2022;54(3):349-358.
doi:10.2298/SOS2203349O .

Omerašević, Mia, Baščarević, Zvezdana D., Vujasin, Radojka, Devečerski, Aleksandar, Bučevac, Dušan, "Effect of Milling Time on Mechanical Properties of Anorthite Obtained by Thermal Transformation of Ca-LTA Zeolite" in Science of Sintering, 54, no. 3 (2022):349-358,
https://doi.org/10.2298/SOS2203349O . .

TY  - CONF
AU  - Krstić, Sanja S.
AU  - Dodevski, Vladimir
AU  - Čokeša, Đuro
AU  - Devečerski, Aleksandar
AU  - Vujasin, Radojka
AU  - Kumrić, Ksenija
AU  - Kaluđerović, Branka V.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10781
AB  - Carbon material with active surface properties have been synthesized by hydrothermal method from fructose using 40% and 80% phosphoric acid (H3 PO4 ) solution, at temperature of 260°C and fructose concentration of 2M. The aim of this investigation was active carbon material synthesis which is completed by one step reaction, which was not the case in our previous works. Thus, compared with other samples from our works, this way is more economic and faster since both reaction of carbonization and activation was finished in one step. The hydrothermal process, in general, includes heat treatment of carbohydrate solutions under autogenous pressure at low temperatures (150–260 °C). Obtained solid carbon material has uniform morphology, amorphous structure and high content of oxygen functional groups. Prepared active carbon material is made up of spherical microsphere particles with the diameter in the range of 0.6-2.7 μm. The morphology and surface properties of obtained material were characterized by scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectra. Adsorption and desorption isotherms of N2 were measured on carbon containing material at -196 °C using the gravimetric McBain method. Adsorption from aqueous solutions of Methylene Blue (MB) onto prepared carbon material was conducted by changing concentration of MB from 200-500mg/dm3 . The best fit of the kinetic results was achieved by a pseudo second-order equation. Also, this nature of material is applicable in other systems regarding environmental protection and dye pollution prevention.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade
T1  - Preparation and Characterization Of Active Carbon Microspheres Obtained From Fructose And Adsorption Application
SP  - 38
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10781
ER  - 

@conference{
author = "Krstić, Sanja S. and Dodevski, Vladimir and Čokeša, Đuro and Devečerski, Aleksandar and Vujasin, Radojka and Kumrić, Ksenija and Kaluđerović, Branka V.",
year = "2021",
abstract = "Carbon material with active surface properties have been synthesized by hydrothermal method from fructose using 40% and 80% phosphoric acid (H3 PO4 ) solution, at temperature of 260°C and fructose concentration of 2M. The aim of this investigation was active carbon material synthesis which is completed by one step reaction, which was not the case in our previous works. Thus, compared with other samples from our works, this way is more economic and faster since both reaction of carbonization and activation was finished in one step. The hydrothermal process, in general, includes heat treatment of carbohydrate solutions under autogenous pressure at low temperatures (150–260 °C). Obtained solid carbon material has uniform morphology, amorphous structure and high content of oxygen functional groups. Prepared active carbon material is made up of spherical microsphere particles with the diameter in the range of 0.6-2.7 μm. The morphology and surface properties of obtained material were characterized by scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectra. Adsorption and desorption isotherms of N2 were measured on carbon containing material at -196 °C using the gravimetric McBain method. Adsorption from aqueous solutions of Methylene Blue (MB) onto prepared carbon material was conducted by changing concentration of MB from 200-500mg/dm3 . The best fit of the kinetic results was achieved by a pseudo second-order equation. Also, this nature of material is applicable in other systems regarding environmental protection and dye pollution prevention.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade",
title = "Preparation and Characterization Of Active Carbon Microspheres Obtained From Fructose And Adsorption Application",
pages = "38",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10781"
}

Krstić, S. S., Dodevski, V., Čokeša, Đ., Devečerski, A., Vujasin, R., Kumrić, K.,& Kaluđerović, B. V.. (2021). Preparation and Characterization Of Active Carbon Microspheres Obtained From Fructose And Adsorption Application. in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade
Belgrade : Serbian Ceramic Society., 38.
https://hdl.handle.net/21.15107/rcub_vinar_10781

Krstić SS, Dodevski V, Čokeša Đ, Devečerski A, Vujasin R, Kumrić K, Kaluđerović BV. Preparation and Characterization Of Active Carbon Microspheres Obtained From Fructose And Adsorption Application. in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade. 2021;:38.
https://hdl.handle.net/21.15107/rcub_vinar_10781 .

Krstić, Sanja S., Dodevski, Vladimir, Čokeša, Đuro, Devečerski, Aleksandar, Vujasin, Radojka, Kumrić, Ksenija, Kaluđerović, Branka V., "Preparation and Characterization Of Active Carbon Microspheres Obtained From Fructose And Adsorption Application" in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade (2021):38,
https://hdl.handle.net/21.15107/rcub_vinar_10781 .

TY  - CONF
AU  - Krstić, Sanja S.
AU  - Dodevski, Vladimir
AU  - Čokeša, Đuro
AU  - Devečerski, Aleksandar
AU  - Vujasin, Radojka
AU  - Kumrić, Ksenija
AU  - Kaluđerović, Branka V.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10841
AB  - A carbon-rich solid product has been synthesized by hydrothermal treatment from fructose with phosphoric acid (H3 PO4 ) at temperature of 250°C and pH value of 0.65. The concentration of the precursor was constant, i.e. 2M of fructose in form of aqueous solution. The formation of the carbon-rich solid material through the hydrothermal carbonization of fructose is the consequence of dehydration reactions. Obtained carbon material is made of spherical micrometer-sized particles with the diameter in the 4-7 μm. The structure and surface chemical properties of obtained material were characterized by scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectra. Investigation of surface area was determined by gravimetric McBain method where adsorption and desorption isotherms of N2 were measured on carbon material at -196 °C. Adsorption of Methylene Blue (MB) onto prepared carbon material were conducted by changing concentration of MB from 200-500 mg/dm 3 from aqueous solutions of investigated dye. Kinetic results were determined by a pseudo second-order equation.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade
T1  - Preparation and Characterization of Active Carbon Microspheres Obtained from Fructose and Adsorption Application
SP  - 81
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10841
ER  - 

@conference{
author = "Krstić, Sanja S. and Dodevski, Vladimir and Čokeša, Đuro and Devečerski, Aleksandar and Vujasin, Radojka and Kumrić, Ksenija and Kaluđerović, Branka V.",
year = "2021",
abstract = "A carbon-rich solid product has been synthesized by hydrothermal treatment from fructose with phosphoric acid (H3 PO4 ) at temperature of 250°C and pH value of 0.65. The concentration of the precursor was constant, i.e. 2M of fructose in form of aqueous solution. The formation of the carbon-rich solid material through the hydrothermal carbonization of fructose is the consequence of dehydration reactions. Obtained carbon material is made of spherical micrometer-sized particles with the diameter in the 4-7 μm. The structure and surface chemical properties of obtained material were characterized by scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectra. Investigation of surface area was determined by gravimetric McBain method where adsorption and desorption isotherms of N2 were measured on carbon material at -196 °C. Adsorption of Methylene Blue (MB) onto prepared carbon material were conducted by changing concentration of MB from 200-500 mg/dm 3 from aqueous solutions of investigated dye. Kinetic results were determined by a pseudo second-order equation.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade",
title = "Preparation and Characterization of Active Carbon Microspheres Obtained from Fructose and Adsorption Application",
pages = "81",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10841"
}

Krstić, S. S., Dodevski, V., Čokeša, Đ., Devečerski, A., Vujasin, R., Kumrić, K.,& Kaluđerović, B. V.. (2021). Preparation and Characterization of Active Carbon Microspheres Obtained from Fructose and Adsorption Application. in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade
Belgrade : Serbian Ceramic Society., 81.
https://hdl.handle.net/21.15107/rcub_vinar_10841

Krstić SS, Dodevski V, Čokeša Đ, Devečerski A, Vujasin R, Kumrić K, Kaluđerović BV. Preparation and Characterization of Active Carbon Microspheres Obtained from Fructose and Adsorption Application. in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade. 2021;:81.
https://hdl.handle.net/21.15107/rcub_vinar_10841 .

Krstić, Sanja S., Dodevski, Vladimir, Čokeša, Đuro, Devečerski, Aleksandar, Vujasin, Radojka, Kumrić, Ksenija, Kaluđerović, Branka V., "Preparation and Characterization of Active Carbon Microspheres Obtained from Fructose and Adsorption Application" in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade (2021):81,
https://hdl.handle.net/21.15107/rcub_vinar_10841 .

TY  - CONF
AU  - Stanković, Katarina
AU  - Petrović, Đ.
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/123456789/12078
AB  - Chitosan and its modified forms have received great attention as potential adsorbents due to its outstanding adsorption characteristics toward removal of vaious toxic heavy metal ions from aqueous solutions. In this work, a porous chitosan hydrogel beads (CHB) and CHB cross-linked with glutaraldehyde (GLA) and citric acid (CA) were synthesized and used for investigation of its adsorption performances toward the removal of Pb(II), Cu(II), Zn(II), Cd(II) and Cr(VI) ions from water in batch and dynamic systems. Maximum removal was achieved in the pH ranges of 4.0 - 6.5 and 2.0 - 3.5 for divalent cations and Cr(VI) oxyanion, respectively. The equilibrium adsorption data were best fitted by the Langmuir isotherm model. Based on the optimal conditions, the fixed-bed breakthrough curves for the removal of the studied metal ions from the aqueous solutions using fixedbed columns were experimentally evaluated, as well as theoretically predicted using COMSOL Multiphysics software.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2021 : 15th international conference on fundamental and applied aspects of physical chemistry
T1  - Development of chitosan-based hydrogel beads for heavy metals removal from aqueous solutions
VL  - II
SP  - 588
EP  - 591
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12078
ER  - 

@conference{
author = "Stanković, Katarina and Petrović, Đ. and Telečki, Igor and Vujasin, Radojka and Matović, Ljiljana and Devečerski, Aleksandar and Kumrić, Ksenija",
year = "2021",
abstract = "Chitosan and its modified forms have received great attention as potential adsorbents due to its outstanding adsorption characteristics toward removal of vaious toxic heavy metal ions from aqueous solutions. In this work, a porous chitosan hydrogel beads (CHB) and CHB cross-linked with glutaraldehyde (GLA) and citric acid (CA) were synthesized and used for investigation of its adsorption performances toward the removal of Pb(II), Cu(II), Zn(II), Cd(II) and Cr(VI) ions from water in batch and dynamic systems. Maximum removal was achieved in the pH ranges of 4.0 - 6.5 and 2.0 - 3.5 for divalent cations and Cr(VI) oxyanion, respectively. The equilibrium adsorption data were best fitted by the Langmuir isotherm model. Based on the optimal conditions, the fixed-bed breakthrough curves for the removal of the studied metal ions from the aqueous solutions using fixedbed columns were experimentally evaluated, as well as theoretically predicted using COMSOL Multiphysics software.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2021 : 15th international conference on fundamental and applied aspects of physical chemistry",
title = "Development of chitosan-based hydrogel beads for heavy metals removal from aqueous solutions",
volume = "II",
pages = "588-591",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12078"
}

Stanković, K., Petrović, Đ., Telečki, I., Vujasin, R., Matović, L., Devečerski, A.,& Kumrić, K.. (2021). Development of chitosan-based hydrogel beads for heavy metals removal from aqueous solutions. in Physical chemistry 2021 : 15th international conference on fundamental and applied aspects of physical chemistry
Society of Physical Chemists of Serbia., II, 588-591.
https://hdl.handle.net/21.15107/rcub_vinar_12078

Stanković K, Petrović Đ, Telečki I, Vujasin R, Matović L, Devečerski A, Kumrić K. Development of chitosan-based hydrogel beads for heavy metals removal from aqueous solutions. in Physical chemistry 2021 : 15th international conference on fundamental and applied aspects of physical chemistry. 2021;II:588-591.
https://hdl.handle.net/21.15107/rcub_vinar_12078 .

Stanković, Katarina, Petrović, Đ., Telečki, Igor, Vujasin, Radojka, Matović, Ljiljana, Devečerski, Aleksandar, Kumrić, Ksenija, "Development of chitosan-based hydrogel beads for heavy metals removal from aqueous solutions" in Physical chemistry 2021 : 15th international conference on fundamental and applied aspects of physical chemistry, II (2021):588-591,
https://hdl.handle.net/21.15107/rcub_vinar_12078 .

TY  - CONF
AU  - Kumrić, Ksenija
AU  - Vujasin, Radojka
AU  - Egerić, Marija
AU  - Petrović, Đ.
AU  - Stanković, Katarina
AU  - Devečerski, Aleksandar
AU  - Matović, Ljiljana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12077
AB  - An analytical method based on solid-phase extraction (SPE) using coconut shell activated carbon (CSAC) as a low-cost adsorbent and high performance liquid chromatography with diode array detector (HPLC-DAD) was developed and validated for the determination of four varying polarity pesticides in water samples. SPE procedure was optimized and under the optimized conditions the proposed method was validated. The method exhibited good linearity, satisfactory precision (1.4 – 5.1%), high enrichment factor, good recovery and low limits of detection (0.025 – 0.039 g/dm3 ). Optimized 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 proposed SPE-HPLC-DAD method could be efficiently used for the determination of the selected pesticides in environmental water samples at trace levels.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2021 : 15th international conference on fundamental and applied aspects of physical chemistry
T1  - Development and validation of a SPE-HPLC-DAD method for the determination of selected pesticides in water samples
VL  - II
SP  - 584
EP  - 587
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12077
ER  - 

@conference{
author = "Kumrić, Ksenija and Vujasin, Radojka and Egerić, Marija and Petrović, Đ. and Stanković, Katarina and Devečerski, Aleksandar and Matović, Ljiljana",
year = "2021",
abstract = "An analytical method based on solid-phase extraction (SPE) using coconut shell activated carbon (CSAC) as a low-cost adsorbent and high performance liquid chromatography with diode array detector (HPLC-DAD) was developed and validated for the determination of four varying polarity pesticides in water samples. SPE procedure was optimized and under the optimized conditions the proposed method was validated. The method exhibited good linearity, satisfactory precision (1.4 – 5.1%), high enrichment factor, good recovery and low limits of detection (0.025 – 0.039 g/dm3 ). Optimized 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 proposed SPE-HPLC-DAD method could be efficiently used for the determination of the selected pesticides in environmental water samples at trace levels.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2021 : 15th international conference on fundamental and applied aspects of physical chemistry",
title = "Development and validation of a SPE-HPLC-DAD method for the determination of selected pesticides in water samples",
volume = "II",
pages = "584-587",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12077"
}

Kumrić, K., Vujasin, R., Egerić, M., Petrović, Đ., Stanković, K., Devečerski, A.,& Matović, L.. (2021). Development and validation of a SPE-HPLC-DAD method for the determination of selected pesticides in water samples. in Physical chemistry 2021 : 15th international conference on fundamental and applied aspects of physical chemistry
Society of Physical Chemists of Serbia., II, 584-587.
https://hdl.handle.net/21.15107/rcub_vinar_12077

Kumrić K, Vujasin R, Egerić M, Petrović Đ, Stanković K, Devečerski A, Matović L. Development and validation of a SPE-HPLC-DAD method for the determination of selected pesticides in water samples. in Physical chemistry 2021 : 15th international conference on fundamental and applied aspects of physical chemistry. 2021;II:584-587.
https://hdl.handle.net/21.15107/rcub_vinar_12077 .

Kumrić, Ksenija, Vujasin, Radojka, Egerić, Marija, Petrović, Đ., Stanković, Katarina, Devečerski, Aleksandar, Matović, Ljiljana, "Development and validation of a SPE-HPLC-DAD method for the determination of selected pesticides in water samples" in Physical chemistry 2021 : 15th international conference on fundamental and applied aspects of physical chemistry, II (2021):584-587,
https://hdl.handle.net/21.15107/rcub_vinar_12077 .

TY  - CONF
AU  - Devečerski, Aleksandar
AU  - Kumrić, Ksenija
AU  - Stanković, S.
AU  - Egerić, Marija
AU  - Omerašević, Mia
AU  - Krstić, Sanja
AU  - Vujasin, Radojka
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12076
AB  - Hazardous industrial wastes are the most common source of environmental pollution. Waters originating from unregulated landfills and places of inadequate disposal of this type of wastes can pollute the water sources and affect the human health. In this study, electroplating waste sludge (ES) and various Fe-rich wastes were used as starting materials for the synthesis of inorganic pigments. Obtained black Cr1.3Fe0.7O3 pigments possess adequate properties required for use as inorganic pigments.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2021 : 15th international conference on fundamental and applied aspects of physical chemistry
T1  - Black inorganic pigments obtained from waste materials
VL  - II
SP  - 580
EP  - 583
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12076
ER  - 

@conference{
author = "Devečerski, Aleksandar and Kumrić, Ksenija and Stanković, S. and Egerić, Marija and Omerašević, Mia and Krstić, Sanja and Vujasin, Radojka",
year = "2021",
abstract = "Hazardous industrial wastes are the most common source of environmental pollution. Waters originating from unregulated landfills and places of inadequate disposal of this type of wastes can pollute the water sources and affect the human health. In this study, electroplating waste sludge (ES) and various Fe-rich wastes were used as starting materials for the synthesis of inorganic pigments. Obtained black Cr1.3Fe0.7O3 pigments possess adequate properties required for use as inorganic pigments.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2021 : 15th international conference on fundamental and applied aspects of physical chemistry",
title = "Black inorganic pigments obtained from waste materials",
volume = "II",
pages = "580-583",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12076"
}

Devečerski, A., Kumrić, K., Stanković, S., Egerić, M., Omerašević, M., Krstić, S.,& Vujasin, R.. (2021). Black inorganic pigments obtained from waste materials. in Physical chemistry 2021 : 15th international conference on fundamental and applied aspects of physical chemistry
Society of Physical Chemists of Serbia., II, 580-583.
https://hdl.handle.net/21.15107/rcub_vinar_12076

Devečerski A, Kumrić K, Stanković S, Egerić M, Omerašević M, Krstić S, Vujasin R. Black inorganic pigments obtained from waste materials. in Physical chemistry 2021 : 15th international conference on fundamental and applied aspects of physical chemistry. 2021;II:580-583.
https://hdl.handle.net/21.15107/rcub_vinar_12076 .

Devečerski, Aleksandar, Kumrić, Ksenija, Stanković, S., Egerić, Marija, Omerašević, Mia, Krstić, Sanja, Vujasin, Radojka, "Black inorganic pigments obtained from waste materials" in Physical chemistry 2021 : 15th international conference on fundamental and applied aspects of physical chemistry, II (2021):580-583,
https://hdl.handle.net/21.15107/rcub_vinar_12076 .

TY  - JOUR
AU  - Matović, Ljiljana
AU  - Vujasin, Radojka
AU  - Kumrić, Ksenija
AU  - Krstić, Sanja S.
AU  - Wu, Yi-nan
AU  - Kabtamu, Daniel Manaye
AU  - Devečerski, Aleksandar
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9545
AB  - Development of method for the complete conversion of Cr-containing electroplating sludge (ES) into the black inorganic pigment was presented. Difficulties related to the ES complex, variable composition and inhomogeneity, where the dominant presence of Cr was followed by: Fe, P, Zn, Ni, Cu, etc., can be overcome by determination of the precise amount of Fe2O3 necessary to be added in order to firmly embed all the heavy metals into the pigment structure (i.e. the Fe0.7Cr1.3O3/FePO4 nanocomposite), taking care not only about weight/molar ratios, but also about average particle size, apparent densities, and volume fraction of the starting materials. As a source of Fe2O3, commercial (p.a.) Fe2O3 and two different Fe-wastes were used, thus completely fulfilling the principles of the circular economy. The obtained black inorganic pigments have consistent composition, no leaching of toxic metals, color (CIE L-a-b-values) comparable with those of commercial pigments and thus have the potential commercial large scale application. © 2021 Elsevier Ltd.
T2  - Journal of Environmental Chemical Engineering
T1  - Designing of technological scheme for conversion of Cr-rich electroplating sludge into the black ceramic pigments of consistent composition, following the principles of circular economy
VL  - 9
IS  - 1
SP  - 105038
DO  - 10.1016/j.jece.2021.105038
ER  - 

@article{
author = "Matović, Ljiljana and Vujasin, Radojka and Kumrić, Ksenija and Krstić, Sanja S. and Wu, Yi-nan and Kabtamu, Daniel Manaye and Devečerski, Aleksandar",
year = "2021",
abstract = "Development of method for the complete conversion of Cr-containing electroplating sludge (ES) into the black inorganic pigment was presented. Difficulties related to the ES complex, variable composition and inhomogeneity, where the dominant presence of Cr was followed by: Fe, P, Zn, Ni, Cu, etc., can be overcome by determination of the precise amount of Fe2O3 necessary to be added in order to firmly embed all the heavy metals into the pigment structure (i.e. the Fe0.7Cr1.3O3/FePO4 nanocomposite), taking care not only about weight/molar ratios, but also about average particle size, apparent densities, and volume fraction of the starting materials. As a source of Fe2O3, commercial (p.a.) Fe2O3 and two different Fe-wastes were used, thus completely fulfilling the principles of the circular economy. The obtained black inorganic pigments have consistent composition, no leaching of toxic metals, color (CIE L-a-b-values) comparable with those of commercial pigments and thus have the potential commercial large scale application. © 2021 Elsevier Ltd.",
journal = "Journal of Environmental Chemical Engineering",
title = "Designing of technological scheme for conversion of Cr-rich electroplating sludge into the black ceramic pigments of consistent composition, following the principles of circular economy",
volume = "9",
number = "1",
pages = "105038",
doi = "10.1016/j.jece.2021.105038"
}

Matović, L., Vujasin, R., Kumrić, K., Krstić, S. S., Wu, Y., Kabtamu, D. M.,& Devečerski, A.. (2021). Designing of technological scheme for conversion of Cr-rich electroplating sludge into the black ceramic pigments of consistent composition, following the principles of circular economy. in Journal of Environmental Chemical Engineering, 9(1), 105038.
https://doi.org/10.1016/j.jece.2021.105038

Matović L, Vujasin R, Kumrić K, Krstić SS, Wu Y, Kabtamu DM, Devečerski A. Designing of technological scheme for conversion of Cr-rich electroplating sludge into the black ceramic pigments of consistent composition, following the principles of circular economy. in Journal of Environmental Chemical Engineering. 2021;9(1):105038.
doi:10.1016/j.jece.2021.105038 .

Matović, Ljiljana, Vujasin, Radojka, Kumrić, Ksenija, Krstić, Sanja S., Wu, Yi-nan, Kabtamu, Daniel Manaye, Devečerski, Aleksandar, "Designing of technological scheme for conversion of Cr-rich electroplating sludge into the black ceramic pigments of consistent composition, following the principles of circular economy" in Journal of Environmental Chemical Engineering, 9, no. 1 (2021):105038,
https://doi.org/10.1016/j.jece.2021.105038 . .

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  - 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  - 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  - JOUR
AU  - Vujasin, Radojka
AU  - Grbović-Novaković, Jasmina
AU  - Novaković, Nikola
AU  - Giusepponi, Simone
AU  - Celino, Massimo
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1382
AB  - Doping of MgH2 with transition metals and their oxides is well-known procedure to improve its hydrogen (de) sorption properties, namely to lower the temperature of desorption and to achieve the kinetics speedup. In order to assess the influence Ti and TiO2 doping has on H mobility and to characterize structurally and electronically observed differences, MgH2-Mg interface doped with both Ti and TiO2 have been studied using ab-initio interface molecular dynamics and bulk calculations. Results suggest different mechanisms of MgH2 structure destabilization. The presence of dopants significantly stabilize MgH2-Mg interface, which is confirmed by work of adhesion computation. Calculated formation energies show that interface system with doped TiO2 is more stable. In terms of H mobility, molecular dynamics simulations confirm that Ti doping is more effective than TiO2 in lowering the desorption temperature. The mobility of hydrogen atoms close to dopant is much higher in the case of Ti than in the case of TiO2. Electronic structure characterization reveals that oxygen atoms with high electron affinity forms more pronounced ionic bonding with Ti and the other neighbor Mg atoms. This in turn cause a shorter Ti-H bonds in first coordination than in the case of Ti doping and further reduction of H atoms mobility. This is in accordance with molecular dynamics predictions. (C) 2016 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Ab-initio study of hydrogen mobility in the vicinity of MgH2-Mg interface: The role of Ti and TiO2
VL  - 696
SP  - 548
EP  - 559
DO  - 10.1016/j.jallcom.2016.11.250
ER  - 

@article{
author = "Vujasin, Radojka and Grbović-Novaković, Jasmina and Novaković, Nikola and Giusepponi, Simone and Celino, Massimo",
year = "2017",
abstract = "Doping of MgH2 with transition metals and their oxides is well-known procedure to improve its hydrogen (de) sorption properties, namely to lower the temperature of desorption and to achieve the kinetics speedup. In order to assess the influence Ti and TiO2 doping has on H mobility and to characterize structurally and electronically observed differences, MgH2-Mg interface doped with both Ti and TiO2 have been studied using ab-initio interface molecular dynamics and bulk calculations. Results suggest different mechanisms of MgH2 structure destabilization. The presence of dopants significantly stabilize MgH2-Mg interface, which is confirmed by work of adhesion computation. Calculated formation energies show that interface system with doped TiO2 is more stable. In terms of H mobility, molecular dynamics simulations confirm that Ti doping is more effective than TiO2 in lowering the desorption temperature. The mobility of hydrogen atoms close to dopant is much higher in the case of Ti than in the case of TiO2. Electronic structure characterization reveals that oxygen atoms with high electron affinity forms more pronounced ionic bonding with Ti and the other neighbor Mg atoms. This in turn cause a shorter Ti-H bonds in first coordination than in the case of Ti doping and further reduction of H atoms mobility. This is in accordance with molecular dynamics predictions. (C) 2016 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Ab-initio study of hydrogen mobility in the vicinity of MgH2-Mg interface: The role of Ti and TiO2",
volume = "696",
pages = "548-559",
doi = "10.1016/j.jallcom.2016.11.250"
}

Vujasin, R., Grbović-Novaković, J., Novaković, N., Giusepponi, S.,& Celino, M.. (2017). Ab-initio study of hydrogen mobility in the vicinity of MgH2-Mg interface: The role of Ti and TiO2. in Journal of Alloys and Compounds, 696, 548-559.
https://doi.org/10.1016/j.jallcom.2016.11.250

Vujasin R, Grbović-Novaković J, Novaković N, Giusepponi S, Celino M. Ab-initio study of hydrogen mobility in the vicinity of MgH2-Mg interface: The role of Ti and TiO2. in Journal of Alloys and Compounds. 2017;696:548-559.
doi:10.1016/j.jallcom.2016.11.250 .

Vujasin, Radojka, Grbović-Novaković, Jasmina, Novaković, Nikola, Giusepponi, Simone, Celino, Massimo, "Ab-initio study of hydrogen mobility in the vicinity of MgH2-Mg interface: The role of Ti and TiO2" in Journal of Alloys and Compounds, 696 (2017):548-559,
https://doi.org/10.1016/j.jallcom.2016.11.250 . .

TY  - THES
AU  - Vujasin, Radojka
PY  - 2017
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=5158
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:16014/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=49205775
UR  - http://nardus.mpn.gov.rs/123456789/8456
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7322
AB  - Magnezijum hidrid, materijal pogodan za skladištenje vodonika zbog velikegravimetrijske i zapreminske gustine, niske cene i netoksičnosti, još nije našao širokuindustrijsku primenu usled velike termodinamičke stabilnosti i visoke temperaturedesorpcije vodonika (447°C). Nepovoljna termodinamika i spora kinetika sorpcije semože poboljšati dodatkom aditiva što destabiliše kristalnu rešetku MgH2. U okviru ovedoktorske disertacije urađena su teorijska i eksperimentalna ispitivanja magnezijumhidrida dopiranog titan dioksidom. Cilj je razumevanje uticaja aditiva i međufaznegranice metal/hidrid, koja nastaje u procesu prodiranja vodonika u potpovršinskeslojeve, na mehanizam i reakciju desorpcije vodonika.Kompoziti MgH2-TiO2 sa 10 mas.% anataz i rutil TiO2, su sintetisanimehaničkim mlevenjem u toku 10 i 20h. Različite polimorfne forme su korišćene kakobi se ispitao njihov uticaj na desorpcione karakteristike MgH2. Dekompozicija hidrida jepraćena diferencijalnom termijskom analizom i odvija se u tri stupnja.Srednjetemperaturski pikovi se pojavljuju zbog katalitičkog uticaja dopanta, a najnižatemperatura 380°C je dobijena za uzorak sa rutil TiO2 mlevenim 10h, dok je zakompozit sa anataznom fazom koji je mleven 20h temperatura daleko viša, 412°C.Proces desorpcije se najbolje opisuje Avrami-Erofejevim kinetičkim modelom za n=4,što isključuje difuziju, a upućuje na procese nukleacije i promene dimenzionalnostikristala kao odlučujuće procese za desorpciju. Zaključeno je da kristalna strukturadopanta igra presudnu ulogu u ubrzanju reakcije desorpcije.Interakcija vodonika sa (110) površinom rutil TiO2, ispitivana teorijomfunkcionala gustine, pokazuje da atomski slojevi paralelni površini koji sadrže atome Tii O deluju kao barijere za prolazak vodonika ka dubini materijala. Između ovih slojevasu oblasti osiromašene naelektrisanjem u kojima atom H lako prelazi sa jednog na drugiatom O. Potvrđeno je i da se uticaj površine može ograničiti na nekoliko atomskihslojeva koji su joj najbliži.Simulacije ponašanja sistema međufazne granice MgH2/Mg dopirane Ti i TiO2su pokazale da je formiranje defekata energijski povoljniji proces, s tim što je sistemdopiran sa TiO2 stabilniji. Praćenje mobilnosti vodonika u blizini međufazne granicehidrid/metal na različitim temperaturama pokazuje da difuzija vodonika u sistemudopiranom Ti počinje na 127°C, a u sistemu sa TiO2 nema primetne difuzije čak i navišim temperaturama. Kiseonik u blizini Ti kao izrazitiji akceptor elektrona posrednoutiče na skraćenje Ti-H veze, i samim tim smanjuje mobilnost vodonika u blizinidopanta...
PB  - Универзитет у Београду, Факултет за физичку хемију
T2  - Универзитет у Београду
T1  - Teorijsko i eksperimentalno istraživanje uticaja TiO2 na sorpciju vodonika u MgH2/Mg sistemu
UR  - https://hdl.handle.net/21.15107/rcub_nardus_8456
ER  - 

@phdthesis{
author = "Vujasin, Radojka",
year = "2017",
abstract = "Magnezijum hidrid, materijal pogodan za skladištenje vodonika zbog velikegravimetrijske i zapreminske gustine, niske cene i netoksičnosti, još nije našao širokuindustrijsku primenu usled velike termodinamičke stabilnosti i visoke temperaturedesorpcije vodonika (447°C). Nepovoljna termodinamika i spora kinetika sorpcije semože poboljšati dodatkom aditiva što destabiliše kristalnu rešetku MgH2. U okviru ovedoktorske disertacije urađena su teorijska i eksperimentalna ispitivanja magnezijumhidrida dopiranog titan dioksidom. Cilj je razumevanje uticaja aditiva i međufaznegranice metal/hidrid, koja nastaje u procesu prodiranja vodonika u potpovršinskeslojeve, na mehanizam i reakciju desorpcije vodonika.Kompoziti MgH2-TiO2 sa 10 mas.% anataz i rutil TiO2, su sintetisanimehaničkim mlevenjem u toku 10 i 20h. Različite polimorfne forme su korišćene kakobi se ispitao njihov uticaj na desorpcione karakteristike MgH2. Dekompozicija hidrida jepraćena diferencijalnom termijskom analizom i odvija se u tri stupnja.Srednjetemperaturski pikovi se pojavljuju zbog katalitičkog uticaja dopanta, a najnižatemperatura 380°C je dobijena za uzorak sa rutil TiO2 mlevenim 10h, dok je zakompozit sa anataznom fazom koji je mleven 20h temperatura daleko viša, 412°C.Proces desorpcije se najbolje opisuje Avrami-Erofejevim kinetičkim modelom za n=4,što isključuje difuziju, a upućuje na procese nukleacije i promene dimenzionalnostikristala kao odlučujuće procese za desorpciju. Zaključeno je da kristalna strukturadopanta igra presudnu ulogu u ubrzanju reakcije desorpcije.Interakcija vodonika sa (110) površinom rutil TiO2, ispitivana teorijomfunkcionala gustine, pokazuje da atomski slojevi paralelni površini koji sadrže atome Tii O deluju kao barijere za prolazak vodonika ka dubini materijala. Između ovih slojevasu oblasti osiromašene naelektrisanjem u kojima atom H lako prelazi sa jednog na drugiatom O. Potvrđeno je i da se uticaj površine može ograničiti na nekoliko atomskihslojeva koji su joj najbliži.Simulacije ponašanja sistema međufazne granice MgH2/Mg dopirane Ti i TiO2su pokazale da je formiranje defekata energijski povoljniji proces, s tim što je sistemdopiran sa TiO2 stabilniji. Praćenje mobilnosti vodonika u blizini međufazne granicehidrid/metal na različitim temperaturama pokazuje da difuzija vodonika u sistemudopiranom Ti počinje na 127°C, a u sistemu sa TiO2 nema primetne difuzije čak i navišim temperaturama. Kiseonik u blizini Ti kao izrazitiji akceptor elektrona posrednoutiče na skraćenje Ti-H veze, i samim tim smanjuje mobilnost vodonika u blizinidopanta...",
publisher = "Универзитет у Београду, Факултет за физичку хемију",
journal = "Универзитет у Београду",
title = "Teorijsko i eksperimentalno istraživanje uticaja TiO2 na sorpciju vodonika u MgH2/Mg sistemu",
url = "https://hdl.handle.net/21.15107/rcub_nardus_8456"
}

Vujasin, R.. (2017). Teorijsko i eksperimentalno istraživanje uticaja TiO2 na sorpciju vodonika u MgH2/Mg sistemu. in Универзитет у Београду
Универзитет у Београду, Факултет за физичку хемију..
https://hdl.handle.net/21.15107/rcub_nardus_8456

Vujasin R. Teorijsko i eksperimentalno istraživanje uticaja TiO2 na sorpciju vodonika u MgH2/Mg sistemu. in Универзитет у Београду. 2017;.
https://hdl.handle.net/21.15107/rcub_nardus_8456 .

Vujasin, Radojka, "Teorijsko i eksperimentalno istraživanje uticaja TiO2 na sorpciju vodonika u MgH2/Mg sistemu" in Универзитет у Београду (2017),
https://hdl.handle.net/21.15107/rcub_nardus_8456 .

TY  - JOUR
AU  - Milošević, Sanja S.
AU  - Kurko, Sandra V.
AU  - Pasquini, Luca
AU  - Matović, Ljiljana
AU  - Vujasin, Radojka
AU  - Novaković, Nikola
AU  - Grbović-Novaković, Jasmina
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/274
AB  - The hydrogen sorption kinetics of MgH2-VO2(B) composites synthesised by mechanical milling have been studied. The microstructural properties of composites were characterized by means of X-ray diffraction (XRD), Raman spectroscopy, Scanning electron microscopy (SEM), Particle size analysis (PSD), while sorption behaviour was followed by differential scanning calorimetry (DSC) and Sievert measurements. Results have shown that although desorption temperature reduction is moderate; there is a substantial improvement in hydrogen sorption kinetics. The complete desorption of pure MgH2 at elevated temperature takes place in more than 30 min while the composite fully desorbs in less than 2 min even at lower temperatures. It has been shown that the metastable gamma-MgH2 phase and the point defects have a decisive role in desorption process only in the first sorption cycle, while the second and the subsequent sorption cycles are affected by microstructural and morphological characteristics of the composite. (C) 2015 Elsevier B.V. All rights reserved.
T2  - Journal of Power Sources
T1  - Fast hydrogen sorption from MgH2-VO2(B) composite materials
VL  - 307
SP  - 481
EP  - 488
DO  - 10.1016/j.jpowsour.2015.12.108
ER  - 

@article{
author = "Milošević, Sanja S. and Kurko, Sandra V. and Pasquini, Luca and Matović, Ljiljana and Vujasin, Radojka and Novaković, Nikola and Grbović-Novaković, Jasmina",
year = "2016",
abstract = "The hydrogen sorption kinetics of MgH2-VO2(B) composites synthesised by mechanical milling have been studied. The microstructural properties of composites were characterized by means of X-ray diffraction (XRD), Raman spectroscopy, Scanning electron microscopy (SEM), Particle size analysis (PSD), while sorption behaviour was followed by differential scanning calorimetry (DSC) and Sievert measurements. Results have shown that although desorption temperature reduction is moderate; there is a substantial improvement in hydrogen sorption kinetics. The complete desorption of pure MgH2 at elevated temperature takes place in more than 30 min while the composite fully desorbs in less than 2 min even at lower temperatures. It has been shown that the metastable gamma-MgH2 phase and the point defects have a decisive role in desorption process only in the first sorption cycle, while the second and the subsequent sorption cycles are affected by microstructural and morphological characteristics of the composite. (C) 2015 Elsevier B.V. All rights reserved.",
journal = "Journal of Power Sources",
title = "Fast hydrogen sorption from MgH2-VO2(B) composite materials",
volume = "307",
pages = "481-488",
doi = "10.1016/j.jpowsour.2015.12.108"
}

Milošević, S. S., Kurko, S. V., Pasquini, L., Matović, L., Vujasin, R., Novaković, N.,& Grbović-Novaković, J.. (2016). Fast hydrogen sorption from MgH2-VO2(B) composite materials. in Journal of Power Sources, 307, 481-488.
https://doi.org/10.1016/j.jpowsour.2015.12.108

Milošević SS, Kurko SV, Pasquini L, Matović L, Vujasin R, Novaković N, Grbović-Novaković J. Fast hydrogen sorption from MgH2-VO2(B) composite materials. in Journal of Power Sources. 2016;307:481-488.
doi:10.1016/j.jpowsour.2015.12.108 .

Milošević, Sanja S., Kurko, Sandra V., Pasquini, Luca, Matović, Ljiljana, Vujasin, Radojka, Novaković, Nikola, Grbović-Novaković, Jasmina, "Fast hydrogen sorption from MgH2-VO2(B) composite materials" in Journal of Power Sources, 307 (2016):481-488,
https://doi.org/10.1016/j.jpowsour.2015.12.108 . .

TY  - JOUR
AU  - Vujasin, Radojka
AU  - Mraković, Ana Đ.
AU  - Kurko, Sandra V.
AU  - Novaković, Nikola
AU  - Matović, Ljiljana
AU  - Grbović-Novaković, Jasmina
AU  - Milošević, Sanja S.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/978
AB  - Hydrogen desorption properties of MgH2 ball milled with two different TiO2 polymorphs, rutile and anatase, were studied. Structural characterization has been done by X-ray diffraction (XRD) analysis, particle size analysis (PSD) and scanning electron microscopy (SEM). The mechanism of desorption and the apparent activation energy for desorption were investigated by applying isoconversional kinetic analysis of DTA spectra, while desorbed species were followed by TPD coupled with mass spectroscopy. It has been demonstrate that the addition of rutile TiO2 significantly decrease the apparent activation energy for desorption (E-des(a)), while addition of anatase titania has negligible influence on E-des(a). Such behaviour could be explained in terms of the same crystal structure of rutile TiO2 and MgH2. Further, the mechanism of desorption changes from Avrami-Erofeev n = 3 for pure MgH2 to Avrami Erofeev n = 4 for composite materials. Copyright (c) 2016, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
PB  - Elsevier
T2  - International Journal of Hydrogen Energy
T1  - Catalytic activity of titania polymorphs towards desorption reaction of MgH2
VL  - 41
IS  - 8
SP  - 4703
EP  - 4711
DO  - 10.1016/j.ijhydene.2016.01.095
ER  - 

@article{
author = "Vujasin, Radojka and Mraković, Ana Đ. and Kurko, Sandra V. and Novaković, Nikola and Matović, Ljiljana and Grbović-Novaković, Jasmina and Milošević, Sanja S.",
year = "2016",
abstract = "Hydrogen desorption properties of MgH2 ball milled with two different TiO2 polymorphs, rutile and anatase, were studied. Structural characterization has been done by X-ray diffraction (XRD) analysis, particle size analysis (PSD) and scanning electron microscopy (SEM). The mechanism of desorption and the apparent activation energy for desorption were investigated by applying isoconversional kinetic analysis of DTA spectra, while desorbed species were followed by TPD coupled with mass spectroscopy. It has been demonstrate that the addition of rutile TiO2 significantly decrease the apparent activation energy for desorption (E-des(a)), while addition of anatase titania has negligible influence on E-des(a). Such behaviour could be explained in terms of the same crystal structure of rutile TiO2 and MgH2. Further, the mechanism of desorption changes from Avrami-Erofeev n = 3 for pure MgH2 to Avrami Erofeev n = 4 for composite materials. Copyright (c) 2016, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.",
publisher = "Elsevier",
journal = "International Journal of Hydrogen Energy",
title = "Catalytic activity of titania polymorphs towards desorption reaction of MgH2",
volume = "41",
number = "8",
pages = "4703-4711",
doi = "10.1016/j.ijhydene.2016.01.095"
}

Vujasin, R., Mraković, A. Đ., Kurko, S. V., Novaković, N., Matović, L., Grbović-Novaković, J.,& Milošević, S. S.. (2016). Catalytic activity of titania polymorphs towards desorption reaction of MgH2. in International Journal of Hydrogen Energy
Elsevier., 41(8), 4703-4711.
https://doi.org/10.1016/j.ijhydene.2016.01.095

Vujasin R, Mraković AĐ, Kurko SV, Novaković N, Matović L, Grbović-Novaković J, Milošević SS. Catalytic activity of titania polymorphs towards desorption reaction of MgH2. in International Journal of Hydrogen Energy. 2016;41(8):4703-4711.
doi:10.1016/j.ijhydene.2016.01.095 .

Vujasin, Radojka, Mraković, Ana Đ., Kurko, Sandra V., Novaković, Nikola, Matović, Ljiljana, Grbović-Novaković, Jasmina, Milošević, Sanja S., "Catalytic activity of titania polymorphs towards desorption reaction of MgH2" in International Journal of Hydrogen Energy, 41, no. 8 (2016):4703-4711,
https://doi.org/10.1016/j.ijhydene.2016.01.095 . .