TY  - JOUR
AU  - Ristić, Mirjana
AU  - Samaržija-Jovanović, Suzana
AU  - Jovanović, Tijana
AU  - Jovanović, Vojislav
AU  - Kostić, Marija
AU  - Marković, Gordana
AU  - Marinović-Cincović, Milena
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12482
AB  - In this research, a composite based on montmorillonite (K10) modified with HDTMABr was used. The characterization of the pure K10, NaMMT and OMMT was performed using XRD, FTIR-ATR, SEM, TG, DTG, and DTA. Ion exchange capacity (CEC) and specific surface area (SSA) were also determined. The sulfite method was used to determine free and liberated formaldehyde (FA) from synthesized urea-formaldehyde/montmorillonite (UF/ MMT) composites. This research aims to demonstrate the bifunctionality of OMMT and that it can be used both for the capture of FA from the synthesized cross-linked UF resin and for the adsorption of the anionic dye Acid Red 183 (AR183) from aquatic medium. SEM analysis showed that there are changes in the morphology of the OMMT and the formation of a hollow network, which affects the absorption capacity of the clay. The calculated values of free and liberated FA in the UF/OMMT composites are drastically reduced and amount to 0.12% and 0.96%, respectively, compared to the composites with K10 (0.6% and 2.04%, respectively). Also, very promising results were obtained of the adsorption of AR183 dyes from the aquatic medium using OMMT. The results show that OMMT (0.5 g OMMT/50 cm3 aqueous dye solution, c=20 mgdm− 3 ) managed to remove 85.95% of AR183 dye (pH dye=7). The adsorption mechanism of AR183 on OMMT follows the Freundlich isotherm and proceeds according to the pseudo-first-order kinetic model. Overall, the findings of this work indicate that the use of the obtained OMMT has great potential in removing pollutants from two totally different systems.
T2  - Journal of Environmental Chemical Engineering
T1  - Organically modified montmorillonite as an environmental adsorbent of pollutants: Formaldehyde from urea-formaldehyde resin and Acid Red 183 dye from the aqueous solution
VL  - 12
IS  - 1
SP  - 111828
DO  - 10.1016/j.jece.2023.111828
ER  - 

@article{
author = "Ristić, Mirjana and Samaržija-Jovanović, Suzana and Jovanović, Tijana and Jovanović, Vojislav and Kostić, Marija and Marković, Gordana and Marinović-Cincović, Milena",
year = "2024",
abstract = "In this research, a composite based on montmorillonite (K10) modified with HDTMABr was used. The characterization of the pure K10, NaMMT and OMMT was performed using XRD, FTIR-ATR, SEM, TG, DTG, and DTA. Ion exchange capacity (CEC) and specific surface area (SSA) were also determined. The sulfite method was used to determine free and liberated formaldehyde (FA) from synthesized urea-formaldehyde/montmorillonite (UF/ MMT) composites. This research aims to demonstrate the bifunctionality of OMMT and that it can be used both for the capture of FA from the synthesized cross-linked UF resin and for the adsorption of the anionic dye Acid Red 183 (AR183) from aquatic medium. SEM analysis showed that there are changes in the morphology of the OMMT and the formation of a hollow network, which affects the absorption capacity of the clay. The calculated values of free and liberated FA in the UF/OMMT composites are drastically reduced and amount to 0.12% and 0.96%, respectively, compared to the composites with K10 (0.6% and 2.04%, respectively). Also, very promising results were obtained of the adsorption of AR183 dyes from the aquatic medium using OMMT. The results show that OMMT (0.5 g OMMT/50 cm3 aqueous dye solution, c=20 mgdm− 3 ) managed to remove 85.95% of AR183 dye (pH dye=7). The adsorption mechanism of AR183 on OMMT follows the Freundlich isotherm and proceeds according to the pseudo-first-order kinetic model. Overall, the findings of this work indicate that the use of the obtained OMMT has great potential in removing pollutants from two totally different systems.",
journal = "Journal of Environmental Chemical Engineering",
title = "Organically modified montmorillonite as an environmental adsorbent of pollutants: Formaldehyde from urea-formaldehyde resin and Acid Red 183 dye from the aqueous solution",
volume = "12",
number = "1",
pages = "111828",
doi = "10.1016/j.jece.2023.111828"
}

Ristić, M., Samaržija-Jovanović, S., Jovanović, T., Jovanović, V., Kostić, M., Marković, G.,& Marinović-Cincović, M.. (2024). Organically modified montmorillonite as an environmental adsorbent of pollutants: Formaldehyde from urea-formaldehyde resin and Acid Red 183 dye from the aqueous solution. in Journal of Environmental Chemical Engineering, 12(1), 111828.
https://doi.org/10.1016/j.jece.2023.111828

Ristić M, Samaržija-Jovanović S, Jovanović T, Jovanović V, Kostić M, Marković G, Marinović-Cincović M. Organically modified montmorillonite as an environmental adsorbent of pollutants: Formaldehyde from urea-formaldehyde resin and Acid Red 183 dye from the aqueous solution. in Journal of Environmental Chemical Engineering. 2024;12(1):111828.
doi:10.1016/j.jece.2023.111828 .

Ristić, Mirjana, Samaržija-Jovanović, Suzana, Jovanović, Tijana, Jovanović, Vojislav, Kostić, Marija, Marković, Gordana, Marinović-Cincović, Milena, "Organically modified montmorillonite as an environmental adsorbent of pollutants: Formaldehyde from urea-formaldehyde resin and Acid Red 183 dye from the aqueous solution" in Journal of Environmental Chemical Engineering, 12, no. 1 (2024):111828,
https://doi.org/10.1016/j.jece.2023.111828 . .

TY  - JOUR
AU  - Buha-Marković, Jovana Z.
AU  - Marinković, Ana D.
AU  - Savić, Jasmina
AU  - Mladenović, Milica R.
AU  - Erić, Milić D.
AU  - Marković, Zoran J.
AU  - Ristić, Mirjana Đ.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10932
AB  - Emission factors (EFs) of gaseous pollutants, particulate matter, certain harmful trace elements, and polycyclic aromatic hydrocarbons (PAHs) from three thermal power plants (TPPs) and semi-industrial fluidized bed boiler (FBB) were compared. EFs of particulate matter, trace elements (except Cd and Pb), benzo[a]pyrene, and benzo[b]fluoranthene exceed the upper limits specified in the EMEP inventory guidebook for all combustion facilities. The comparison of trace elements and PAHs content in fly ashes (FAs) from lignite and coal waste combustion in TPPs and FBB, respectively, as well as the potential environmental impact of FAs disposal, was performed by employing a set of ecological indicators such as crustal enrichment factor, risk assessment code, risk indices for trace elements, and benzo[a]pyrene equivalent concentration for PAHs. Sequential analysis shows that the trace elements portion is the lowest for water-soluble and exchangeable fractions. The highest enrichment levels in FAs are noticed for As and Hg. Based on toxic trace elements content, FAs from TPPs represent a very high ecological risk, whereas fly ash from FBB poses a moderate ecological risk but has the highest benzo[a]pyrene equivalent concentration, indicating its increased carcinogenic potential. Lead isotope ratios for Serbian coals and FAs can contribute to a lead pollution global database.
T2  - Toxics
T1  - Risk Evaluation of Pollutants Emission from Coal and Coal Waste Combustion Plants and Environmental Impact of Fly Ash Landfilling
VL  - 11
IS  - 4
SP  - 396
DO  - 10.3390/toxics11040396
ER  - 

@article{
author = "Buha-Marković, Jovana Z. and Marinković, Ana D. and Savić, Jasmina and Mladenović, Milica R. and Erić, Milić D. and Marković, Zoran J. and Ristić, Mirjana Đ.",
year = "2023",
abstract = "Emission factors (EFs) of gaseous pollutants, particulate matter, certain harmful trace elements, and polycyclic aromatic hydrocarbons (PAHs) from three thermal power plants (TPPs) and semi-industrial fluidized bed boiler (FBB) were compared. EFs of particulate matter, trace elements (except Cd and Pb), benzo[a]pyrene, and benzo[b]fluoranthene exceed the upper limits specified in the EMEP inventory guidebook for all combustion facilities. The comparison of trace elements and PAHs content in fly ashes (FAs) from lignite and coal waste combustion in TPPs and FBB, respectively, as well as the potential environmental impact of FAs disposal, was performed by employing a set of ecological indicators such as crustal enrichment factor, risk assessment code, risk indices for trace elements, and benzo[a]pyrene equivalent concentration for PAHs. Sequential analysis shows that the trace elements portion is the lowest for water-soluble and exchangeable fractions. The highest enrichment levels in FAs are noticed for As and Hg. Based on toxic trace elements content, FAs from TPPs represent a very high ecological risk, whereas fly ash from FBB poses a moderate ecological risk but has the highest benzo[a]pyrene equivalent concentration, indicating its increased carcinogenic potential. Lead isotope ratios for Serbian coals and FAs can contribute to a lead pollution global database.",
journal = "Toxics",
title = "Risk Evaluation of Pollutants Emission from Coal and Coal Waste Combustion Plants and Environmental Impact of Fly Ash Landfilling",
volume = "11",
number = "4",
pages = "396",
doi = "10.3390/toxics11040396"
}

Buha-Marković, J. Z., Marinković, A. D., Savić, J., Mladenović, M. R., Erić, M. D., Marković, Z. J.,& Ristić, M. Đ.. (2023). Risk Evaluation of Pollutants Emission from Coal and Coal Waste Combustion Plants and Environmental Impact of Fly Ash Landfilling. in Toxics, 11(4), 396.
https://doi.org/10.3390/toxics11040396

Buha-Marković JZ, Marinković AD, Savić J, Mladenović MR, Erić MD, Marković ZJ, Ristić MĐ. Risk Evaluation of Pollutants Emission from Coal and Coal Waste Combustion Plants and Environmental Impact of Fly Ash Landfilling. in Toxics. 2023;11(4):396.
doi:10.3390/toxics11040396 .

Buha-Marković, Jovana Z., Marinković, Ana D., Savić, Jasmina, Mladenović, Milica R., Erić, Milić D., Marković, Zoran J., Ristić, Mirjana Đ., "Risk Evaluation of Pollutants Emission from Coal and Coal Waste Combustion Plants and Environmental Impact of Fly Ash Landfilling" in Toxics, 11, no. 4 (2023):396,
https://doi.org/10.3390/toxics11040396 . .

TY  - CONF
AU  - Ristić, Mirjana
AU  - Samaržija-Jovanović, Suzana
AU  - Jovanović, Vojislav
AU  - Kostić, Marija
AU  - Jovanović, Tijana
AU  - Marković, Gordana
AU  - Kojić, Marija
AU  - Marinović-Cincović, Milena
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12225
PB  - Niš : RAD Centre
C3  - RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts
T1  - Functional materials based on renewable raw materials: hydrochar and chitosan as formaldehyde scavengers in urea-formaldehide composites
SP  - 80
EP  - 80
DO  - 10.21175/rad.abstr.book.2023.19.1
ER  - 

@conference{
author = "Ristić, Mirjana and Samaržija-Jovanović, Suzana and Jovanović, Vojislav and Kostić, Marija and Jovanović, Tijana and Marković, Gordana and Kojić, Marija and Marinović-Cincović, Milena",
year = "2023",
publisher = "Niš : RAD Centre",
journal = "RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts",
title = "Functional materials based on renewable raw materials: hydrochar and chitosan as formaldehyde scavengers in urea-formaldehide composites",
pages = "80-80",
doi = "10.21175/rad.abstr.book.2023.19.1"
}

Ristić, M., Samaržija-Jovanović, S., Jovanović, V., Kostić, M., Jovanović, T., Marković, G., Kojić, M.,& Marinović-Cincović, M.. (2023). Functional materials based on renewable raw materials: hydrochar and chitosan as formaldehyde scavengers in urea-formaldehide composites. in RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts
Niš : RAD Centre., 80-80.
https://doi.org/10.21175/rad.abstr.book.2023.19.1

Ristić M, Samaržija-Jovanović S, Jovanović V, Kostić M, Jovanović T, Marković G, Kojić M, Marinović-Cincović M. Functional materials based on renewable raw materials: hydrochar and chitosan as formaldehyde scavengers in urea-formaldehide composites. in RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts. 2023;:80-80.
doi:10.21175/rad.abstr.book.2023.19.1 .

Ristić, Mirjana, Samaržija-Jovanović, Suzana, Jovanović, Vojislav, Kostić, Marija, Jovanović, Tijana, Marković, Gordana, Kojić, Marija, Marinović-Cincović, Milena, "Functional materials based on renewable raw materials: hydrochar and chitosan as formaldehyde scavengers in urea-formaldehide composites" in RAD 2023 : 11th International Conference on Radiation Natural Sciences, Medicine, Engineering, Technology and Ecology : Book of Abstracts (2023):80-80,
https://doi.org/10.21175/rad.abstr.book.2023.19.1 . .

TY  - JOUR
AU  - Ristić, Mirjana
AU  - Samaržija-Jovanović, Suzana
AU  - Jovanović, Vojislav
AU  - Kostić, Marija
AU  - Erceg, Tamara
AU  - Jovanović, Tijana
AU  - Marković, Gordana
AU  - Marinović-Cincović, Milena
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11101
AB  - In this work, betaine (trimethyl glycine) and tannin (complex biomolecules of polyphenolic nature) were used as bio-fillers. Urea-formaldehyde (UF) resin with a molar ratio of formaldehyde versus urea (FA/U) of 0.8 was synthesized in situ with tannin and betaine as bio-fillers, to obtain UF resin with reduced free FA content and increased hydrolytic and thermal stability by the principles of sustainability. The samples TUF (with tannin) and BUF (with betaine) were characterized by using X-ray diffraction analysis (XRD), non-isothermal thermogravimetric analysis (TGA), and differential thermal analysis (DTA), supported by data from Fourier Transform Infrared spectroscopy (FTIR) and Scanning electron microscopy (SEM). The percentage of free FA in modified BUF resin is 0.1%, while the percentage of free FA in tannin-modified resin is 0.8%. The hydrolytic stability of the modified UF resins was determined by measuring the concentration of liberated FA in the modified UF resins, after acid hydrolysis. The modified BUF resin is hydrolytically more stable because the content of released FA is 3.6% compared to the modified TUF resin, where it was 7.4%. Based on the value for T5%, the more thermally stable resin is the modified TUF resin (T5% = 123.1°C), while the value of the T5% for the BUF resin is 83.1°C. This work showed how UF bio-composite with reduced free FA content and increased hydrolytic and thermal stability can be obtained using tannin and betaine as bio-fillers.
T2  - Journal of Vinyl and Additive Technology
T1  - Hydrolytic and thermal stability of urea-formaldehyde resins based on tannin and betaine bio-fillers
VL  - 29
IS  - 6
SP  - 1082
EP  - 1092
DO  - 10.1002/vnl.22024
ER  - 

@article{
author = "Ristić, Mirjana and Samaržija-Jovanović, Suzana and Jovanović, Vojislav and Kostić, Marija and Erceg, Tamara and Jovanović, Tijana and Marković, Gordana and Marinović-Cincović, Milena",
year = "2023",
abstract = "In this work, betaine (trimethyl glycine) and tannin (complex biomolecules of polyphenolic nature) were used as bio-fillers. Urea-formaldehyde (UF) resin with a molar ratio of formaldehyde versus urea (FA/U) of 0.8 was synthesized in situ with tannin and betaine as bio-fillers, to obtain UF resin with reduced free FA content and increased hydrolytic and thermal stability by the principles of sustainability. The samples TUF (with tannin) and BUF (with betaine) were characterized by using X-ray diffraction analysis (XRD), non-isothermal thermogravimetric analysis (TGA), and differential thermal analysis (DTA), supported by data from Fourier Transform Infrared spectroscopy (FTIR) and Scanning electron microscopy (SEM). The percentage of free FA in modified BUF resin is 0.1%, while the percentage of free FA in tannin-modified resin is 0.8%. The hydrolytic stability of the modified UF resins was determined by measuring the concentration of liberated FA in the modified UF resins, after acid hydrolysis. The modified BUF resin is hydrolytically more stable because the content of released FA is 3.6% compared to the modified TUF resin, where it was 7.4%. Based on the value for T5%, the more thermally stable resin is the modified TUF resin (T5% = 123.1°C), while the value of the T5% for the BUF resin is 83.1°C. This work showed how UF bio-composite with reduced free FA content and increased hydrolytic and thermal stability can be obtained using tannin and betaine as bio-fillers.",
journal = "Journal of Vinyl and Additive Technology",
title = "Hydrolytic and thermal stability of urea-formaldehyde resins based on tannin and betaine bio-fillers",
volume = "29",
number = "6",
pages = "1082-1092",
doi = "10.1002/vnl.22024"
}

Ristić, M., Samaržija-Jovanović, S., Jovanović, V., Kostić, M., Erceg, T., Jovanović, T., Marković, G.,& Marinović-Cincović, M.. (2023). Hydrolytic and thermal stability of urea-formaldehyde resins based on tannin and betaine bio-fillers. in Journal of Vinyl and Additive Technology, 29(6), 1082-1092.
https://doi.org/10.1002/vnl.22024

Ristić M, Samaržija-Jovanović S, Jovanović V, Kostić M, Erceg T, Jovanović T, Marković G, Marinović-Cincović M. Hydrolytic and thermal stability of urea-formaldehyde resins based on tannin and betaine bio-fillers. in Journal of Vinyl and Additive Technology. 2023;29(6):1082-1092.
doi:10.1002/vnl.22024 .

Ristić, Mirjana, Samaržija-Jovanović, Suzana, Jovanović, Vojislav, Kostić, Marija, Erceg, Tamara, Jovanović, Tijana, Marković, Gordana, Marinović-Cincović, Milena, "Hydrolytic and thermal stability of urea-formaldehyde resins based on tannin and betaine bio-fillers" in Journal of Vinyl and Additive Technology, 29, no. 6 (2023):1082-1092,
https://doi.org/10.1002/vnl.22024 . .

TY  - JOUR
AU  - Ristić, Mirjana
AU  - Samaržija-Jovanović, Suzana
AU  - Jovanović, Vojislav
AU  - Kostić, Marija
AU  - Jovanović, Tijana
AU  - Marković, Gordana
AU  - Kojić, Marija
AU  - Vujčić, Ivica
AU  - Marinović-Cincović, Milena
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11081
AB  - To provide new insight into the field of urea-formaldehyde (UF) adhesives science, in this work, for the first time, UF resin was modified with hydrochar of spent mushroom substrate (HCUF) and chitosan (CHUF) to investigate the effect of these bio-fillers on the hydrolytic and thermal stability of in situ prepared UF resins. The characterization of the modified UF biocomposites was performed using X-ray diffraction analysis (XRD), Fourier transforms infrared spectroscopy (FTIR), non-isothermal thermogravimetric analysis (TG), differential thermal gravimetry (DTG), and differential thermal analysis (DTA). Scanning electron micrographs (SEM) of the CHUF and HCUF biocomposites show a spherical structure that differs from each other because the surface of the CHUF biocomposite has pronounced pores that form a network structure. With its hydroxyl and amino groups, chitosan bonding to UF resin through hydrogen bonds, which is confirmed by FTIR analysis. The content of free FA in CHUF biocomposite is 0.06%, while that of HCUF is higher and amounts to 0.48%. The content of released FA in both modified UF biocomposites was similar (2.5% and 2.8% for CHUF and HCUF, respectively). The hydrolytic stability of CHUF is slightly higher compared to the HCUF biocomposite. Thermal analysis shows that the CHUF is thermally more stable because it starts to decompose at a slightly higher temperature than the HCUF biocomposite.
T2  - Journal of Vinyl and Additive Technology
T1  - The comparative study of biocomposites based on hydrochar and chitosan-modified urea-formaldehyde resins
IS  - Early View
DO  - 10.1002/vnl.22014
ER  - 

@article{
author = "Ristić, Mirjana and Samaržija-Jovanović, Suzana and Jovanović, Vojislav and Kostić, Marija and Jovanović, Tijana and Marković, Gordana and Kojić, Marija and Vujčić, Ivica and Marinović-Cincović, Milena",
year = "2023",
abstract = "To provide new insight into the field of urea-formaldehyde (UF) adhesives science, in this work, for the first time, UF resin was modified with hydrochar of spent mushroom substrate (HCUF) and chitosan (CHUF) to investigate the effect of these bio-fillers on the hydrolytic and thermal stability of in situ prepared UF resins. The characterization of the modified UF biocomposites was performed using X-ray diffraction analysis (XRD), Fourier transforms infrared spectroscopy (FTIR), non-isothermal thermogravimetric analysis (TG), differential thermal gravimetry (DTG), and differential thermal analysis (DTA). Scanning electron micrographs (SEM) of the CHUF and HCUF biocomposites show a spherical structure that differs from each other because the surface of the CHUF biocomposite has pronounced pores that form a network structure. With its hydroxyl and amino groups, chitosan bonding to UF resin through hydrogen bonds, which is confirmed by FTIR analysis. The content of free FA in CHUF biocomposite is 0.06%, while that of HCUF is higher and amounts to 0.48%. The content of released FA in both modified UF biocomposites was similar (2.5% and 2.8% for CHUF and HCUF, respectively). The hydrolytic stability of CHUF is slightly higher compared to the HCUF biocomposite. Thermal analysis shows that the CHUF is thermally more stable because it starts to decompose at a slightly higher temperature than the HCUF biocomposite.",
journal = "Journal of Vinyl and Additive Technology",
title = "The comparative study of biocomposites based on hydrochar and chitosan-modified urea-formaldehyde resins",
number = "Early View",
doi = "10.1002/vnl.22014"
}

Ristić, M., Samaržija-Jovanović, S., Jovanović, V., Kostić, M., Jovanović, T., Marković, G., Kojić, M., Vujčić, I.,& Marinović-Cincović, M.. (2023). The comparative study of biocomposites based on hydrochar and chitosan-modified urea-formaldehyde resins. in Journal of Vinyl and Additive Technology(Early View).
https://doi.org/10.1002/vnl.22014

Ristić M, Samaržija-Jovanović S, Jovanović V, Kostić M, Jovanović T, Marković G, Kojić M, Vujčić I, Marinović-Cincović M. The comparative study of biocomposites based on hydrochar and chitosan-modified urea-formaldehyde resins. in Journal of Vinyl and Additive Technology. 2023;(Early View).
doi:10.1002/vnl.22014 .

Ristić, Mirjana, Samaržija-Jovanović, Suzana, Jovanović, Vojislav, Kostić, Marija, Jovanović, Tijana, Marković, Gordana, Kojić, Marija, Vujčić, Ivica, Marinović-Cincović, Milena, "The comparative study of biocomposites based on hydrochar and chitosan-modified urea-formaldehyde resins" in Journal of Vinyl and Additive Technology, no. Early View (2023),
https://doi.org/10.1002/vnl.22014 . .

TY  - CONF
AU  - Stojković, Milica
AU  - Dedić, Sofija
AU  - Đolić, Maja
AU  - Ćujić, Mirjana
AU  - Pavićević, Vladimir
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11230
AB  - Fly ash originating from coal combustion in thermal power plants is generated in landfills in large amounts, and due to the high content of heavy metals and metalloids whose mobility is hazardous to the environment and human health, it causes soil and groundwater pollution. Scientific research in the field of "alternative mining" is significant, where heavy metals and rare earth elements would be recovered from waste materials such as fly ash using various extraction methods. The aim of this paper is to determine the optimal extraction process of the examined elements: V, Cr, Mn, Co, Ni, Cu, Zn, As, Cd, and Pb from fly ash. Two extraction agents were used: sulfuric and acetic acid. In the first set of experiments, the fly ash was immersed immediately in acids, and in the second set, this process was preceded by the addition of sodium hydroxide, which effectively destroys the alumina-silicate matrix. Several different parameters were also monitored: ratio of fly ash and acid/acid mixture (1:5, 1:30), temperature (25 and 45°C), duration of the process (4 and 24 h), and stirring. For the extraction of Pb - H2SO4, temperature and time were shown as significant parameters, while for Cd, only H2SO4 was an effective extractant. Concerning the As metalloid, the acetic acid, solid/liquid ratio, and time were significant, while for Zn, Cu, Co, Mn, and V metals only the solid/liquid ratio was significant. Determination of the content of heavy metals and metalloids was done by the ICP-MS.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia (AMES)
C3  - 5th Metallurgical & Materials Engineering Congress of South-East Europe : Proceedings
T1  - The Optimization of Metals and Metalloids Extraction From Fly Ash
SP  - 347
EP  - 352
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11230
ER  - 

@conference{
author = "Stojković, Milica and Dedić, Sofija and Đolić, Maja and Ćujić, Mirjana and Pavićević, Vladimir and Ristić, Mirjana and Perić-Grujić, Aleksandra",
year = "2023",
abstract = "Fly ash originating from coal combustion in thermal power plants is generated in landfills in large amounts, and due to the high content of heavy metals and metalloids whose mobility is hazardous to the environment and human health, it causes soil and groundwater pollution. Scientific research in the field of "alternative mining" is significant, where heavy metals and rare earth elements would be recovered from waste materials such as fly ash using various extraction methods. The aim of this paper is to determine the optimal extraction process of the examined elements: V, Cr, Mn, Co, Ni, Cu, Zn, As, Cd, and Pb from fly ash. Two extraction agents were used: sulfuric and acetic acid. In the first set of experiments, the fly ash was immersed immediately in acids, and in the second set, this process was preceded by the addition of sodium hydroxide, which effectively destroys the alumina-silicate matrix. Several different parameters were also monitored: ratio of fly ash and acid/acid mixture (1:5, 1:30), temperature (25 and 45°C), duration of the process (4 and 24 h), and stirring. For the extraction of Pb - H2SO4, temperature and time were shown as significant parameters, while for Cd, only H2SO4 was an effective extractant. Concerning the As metalloid, the acetic acid, solid/liquid ratio, and time were significant, while for Zn, Cu, Co, Mn, and V metals only the solid/liquid ratio was significant. Determination of the content of heavy metals and metalloids was done by the ICP-MS.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia (AMES)",
journal = "5th Metallurgical & Materials Engineering Congress of South-East Europe : Proceedings",
title = "The Optimization of Metals and Metalloids Extraction From Fly Ash",
pages = "347-352",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11230"
}

Stojković, M., Dedić, S., Đolić, M., Ćujić, M., Pavićević, V., Ristić, M.,& Perić-Grujić, A.. (2023). The Optimization of Metals and Metalloids Extraction From Fly Ash. in 5th Metallurgical & Materials Engineering Congress of South-East Europe : Proceedings
Belgrade : Association of Metallurgical Engineers of Serbia (AMES)., 347-352.
https://hdl.handle.net/21.15107/rcub_vinar_11230

Stojković M, Dedić S, Đolić M, Ćujić M, Pavićević V, Ristić M, Perić-Grujić A. The Optimization of Metals and Metalloids Extraction From Fly Ash. in 5th Metallurgical & Materials Engineering Congress of South-East Europe : Proceedings. 2023;:347-352.
https://hdl.handle.net/21.15107/rcub_vinar_11230 .

Stojković, Milica, Dedić, Sofija, Đolić, Maja, Ćujić, Mirjana, Pavićević, Vladimir, Ristić, Mirjana, Perić-Grujić, Aleksandra, "The Optimization of Metals and Metalloids Extraction From Fly Ash" in 5th Metallurgical & Materials Engineering Congress of South-East Europe : Proceedings (2023):347-352,
https://hdl.handle.net/21.15107/rcub_vinar_11230 .

TY  - CONF
AU  - Ristić, Mirjana
AU  - Samaržija-Jovanović, Suzana
AU  - Jovanović, Vojislav
AU  - Petković, Branka
AU  - Kostić, Marija
AU  - Jovanović, Tijana
AU  - Marković, Gordana
AU  - Marinović-Cincović, Milena
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11113
AB  - Fig (Ficus carica L.) is a fruit of the Moraceae family, which is mostly grown in subtropical regions, but also grows in Serbia. Fig trees are usually grown in warm and dry climates. According to the FAO world production of figs is stable, with a decade-long average of about 1.1 million tons a year. Fig pomace are formed after fermentation of this fruit which is used for the preparation of brandy. The brandy industry generates huge amounts of pomace as industrial waste, so pyrolysis as thermochemical technologies was used for organic agro-industrial waste treatment. Biochar produced by pyrolysis of fig pomace at 500 °C were characterized and investigated as adsorbents for the removal of Pb2+ ions from aqueous solution. Fig pomace before and after pyrolysis was characterized using proximate, inorganic and elemental analysis, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and differential thermal analysis (DTA). Biochar has a carbon matrix with a high degree of porosity and large surface area, suggesting that it can be used as a surface adsorbent and thus have a significant role in controlling environmental contaminants. The surface modification by gamma irradiation was done to enhance the adsorption capacity of biochar. The Pb2+ ions contents in aqueous solution were analyzed using ICP-OES. The adsorption capacity was estimated using the Freundlich and Langmuir model. The results of this work suggest that pyrolysis and irradiation of biomass is a promising way to produce efficient heavy metal sorbents for waste-water treatment.
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
T1  - Cross-linked bio/inorganically modified urea-formaldehyde
resins: Influence of γ-radiation on formaldehyde content
SP  - 61
DO  - 10.21175/rad.spr.abstr.book.2022.16.5
ER  - 

@conference{
author = "Ristić, Mirjana and Samaržija-Jovanović, Suzana and Jovanović, Vojislav and Petković, Branka and Kostić, Marija and Jovanović, Tijana and Marković, Gordana and Marinović-Cincović, Milena",
year = "2022",
abstract = "Fig (Ficus carica L.) is a fruit of the Moraceae family, which is mostly grown in subtropical regions, but also grows in Serbia. Fig trees are usually grown in warm and dry climates. According to the FAO world production of figs is stable, with a decade-long average of about 1.1 million tons a year. Fig pomace are formed after fermentation of this fruit which is used for the preparation of brandy. The brandy industry generates huge amounts of pomace as industrial waste, so pyrolysis as thermochemical technologies was used for organic agro-industrial waste treatment. Biochar produced by pyrolysis of fig pomace at 500 °C were characterized and investigated as adsorbents for the removal of Pb2+ ions from aqueous solution. Fig pomace before and after pyrolysis was characterized using proximate, inorganic and elemental analysis, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and differential thermal analysis (DTA). Biochar has a carbon matrix with a high degree of porosity and large surface area, suggesting that it can be used as a surface adsorbent and thus have a significant role in controlling environmental contaminants. The surface modification by gamma irradiation was done to enhance the adsorption capacity of biochar. The Pb2+ ions contents in aqueous solution were analyzed using ICP-OES. The adsorption capacity was estimated using the Freundlich and Langmuir model. The results of this work suggest that pyrolysis and irradiation of biomass is a promising way to produce efficient heavy metal sorbents for waste-water treatment.",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro",
title = "Cross-linked bio/inorganically modified urea-formaldehyde
resins: Influence of γ-radiation on formaldehyde content",
pages = "61",
doi = "10.21175/rad.spr.abstr.book.2022.16.5"
}

Ristić, M., Samaržija-Jovanović, S., Jovanović, V., Petković, B., Kostić, M., Jovanović, T., Marković, G.,& Marinović-Cincović, M.. (2022). Cross-linked bio/inorganically modified urea-formaldehyde
resins: Influence of γ-radiation on formaldehyde content. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
RAD Centre, Niš, Serbia., 61.
https://doi.org/10.21175/rad.spr.abstr.book.2022.16.5

Ristić M, Samaržija-Jovanović S, Jovanović V, Petković B, Kostić M, Jovanović T, Marković G, Marinović-Cincović M. Cross-linked bio/inorganically modified urea-formaldehyde
resins: Influence of γ-radiation on formaldehyde content. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro. 2022;:61.
doi:10.21175/rad.spr.abstr.book.2022.16.5 .

Ristić, Mirjana, Samaržija-Jovanović, Suzana, Jovanović, Vojislav, Petković, Branka, Kostić, Marija, Jovanović, Tijana, Marković, Gordana, Marinović-Cincović, Milena, "Cross-linked bio/inorganically modified urea-formaldehyde
resins: Influence of γ-radiation on formaldehyde content" in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro (2022):61,
https://doi.org/10.21175/rad.spr.abstr.book.2022.16.5 . .

TY  - CONF
AU  - Ćujić, Mirjana
AU  - Đolić, Maja
AU  - Živojinović, Dragana
AU  - Ristić, Mirjana
AU  - Perić Grujić, Aleksandra
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11231
AB  - The Republic of Serbia predominantly produces electricity in thermal power plants (TPP) Nikola Tesla (A i B), Kolubara and Kostolac. They are supplied from Kolubara basin mines (Nikola Tesla (A i B), Kolubara) which produces three quarters of Serbian lignite (about 70%), with the mean annual production about 30 million tons of coal and from Kostolac basin (TE Kostolac) which produces 30% of lignite in Serbia. Coal combustion residuals include bottom ash, fly ash and slag. Environmental pollution by coal ash and fly ash has been intensively studied taking into account high content of potentially hazardous elements such as As, Pb, Cd and Cr. Tracking lead sources in environmental studies has usually been performed by stable lead isotopes. The pres- ence, pathways and environmental impact of coal ash and fly ash can be identified using Pb isotopic compositions. In this study, isotopic compositions for 12 coal samples from Kolubara and Kostolac major coal mines and 12 fly ash samples from thermal power plants Kolubara (A and B), Kostolac (A and B), Nikola Tesla TENT (A3, A2, and B1) were determined. Samples were digested in mineral acids mixture. Lead conc- entration and stable Pb isotopes were measured by inductively coupled plasma mass spectrometry (ICP-MS). The results obtained might be useful in monitoring of Pb poll- ution from the examined sources, as well as in emission control.
PB  - Beograd : Naučno-stručno Društvo za zaštitu životne sredine Srbije ECOLOGICA
C3  - International Scientific Conference Sustainable Development and Green Economy : Book of Abstracts
T1  - Stable Lead Isotope Compositions in Coal, Coal Ash and Coal Fly Ash From Serbia
SP  - 153
EP  - 154
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11231
ER  - 

@conference{
author = "Ćujić, Mirjana and Đolić, Maja and Živojinović, Dragana and Ristić, Mirjana and Perić Grujić, Aleksandra",
year = "2022",
abstract = "The Republic of Serbia predominantly produces electricity in thermal power plants (TPP) Nikola Tesla (A i B), Kolubara and Kostolac. They are supplied from Kolubara basin mines (Nikola Tesla (A i B), Kolubara) which produces three quarters of Serbian lignite (about 70%), with the mean annual production about 30 million tons of coal and from Kostolac basin (TE Kostolac) which produces 30% of lignite in Serbia. Coal combustion residuals include bottom ash, fly ash and slag. Environmental pollution by coal ash and fly ash has been intensively studied taking into account high content of potentially hazardous elements such as As, Pb, Cd and Cr. Tracking lead sources in environmental studies has usually been performed by stable lead isotopes. The pres- ence, pathways and environmental impact of coal ash and fly ash can be identified using Pb isotopic compositions. In this study, isotopic compositions for 12 coal samples from Kolubara and Kostolac major coal mines and 12 fly ash samples from thermal power plants Kolubara (A and B), Kostolac (A and B), Nikola Tesla TENT (A3, A2, and B1) were determined. Samples were digested in mineral acids mixture. Lead conc- entration and stable Pb isotopes were measured by inductively coupled plasma mass spectrometry (ICP-MS). The results obtained might be useful in monitoring of Pb poll- ution from the examined sources, as well as in emission control.",
publisher = "Beograd : Naučno-stručno Društvo za zaštitu životne sredine Srbije ECOLOGICA",
journal = "International Scientific Conference Sustainable Development and Green Economy : Book of Abstracts",
title = "Stable Lead Isotope Compositions in Coal, Coal Ash and Coal Fly Ash From Serbia",
pages = "153-154",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11231"
}

Ćujić, M., Đolić, M., Živojinović, D., Ristić, M.,& Perić Grujić, A.. (2022). Stable Lead Isotope Compositions in Coal, Coal Ash and Coal Fly Ash From Serbia. in International Scientific Conference Sustainable Development and Green Economy : Book of Abstracts
Beograd : Naučno-stručno Društvo za zaštitu životne sredine Srbije ECOLOGICA., 153-154.
https://hdl.handle.net/21.15107/rcub_vinar_11231

Ćujić M, Đolić M, Živojinović D, Ristić M, Perić Grujić A. Stable Lead Isotope Compositions in Coal, Coal Ash and Coal Fly Ash From Serbia. in International Scientific Conference Sustainable Development and Green Economy : Book of Abstracts. 2022;:153-154.
https://hdl.handle.net/21.15107/rcub_vinar_11231 .

Ćujić, Mirjana, Đolić, Maja, Živojinović, Dragana, Ristić, Mirjana, Perić Grujić, Aleksandra, "Stable Lead Isotope Compositions in Coal, Coal Ash and Coal Fly Ash From Serbia" in International Scientific Conference Sustainable Development and Green Economy : Book of Abstracts (2022):153-154,
https://hdl.handle.net/21.15107/rcub_vinar_11231 .

TY  - JOUR
AU  - Đolić, Maja
AU  - Ćujić, Mirjana
AU  - Stanišić, Tijana
AU  - Čičkarić, Dragana
AU  - Ristić, Mirjana
AU  - Perić Grujić, Aleksandra
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10597
AB  - The Republic of Serbia generates the majority of its electricity at the thermal power plants (TE) Nikola Tesla, Kolubara, and Kostolac. Coal is extracted from the Kolubara basin, which produces approximately 70% of lignite (an average of 30 million tons per year), and the Kostolac basin, which produces 30% of lignite. Ash, fly ash, and slag are examples of coal combustion residues. Because of the high content of potentially hazardous elements such as As, Pb, Cd, and Cr, environmental pollution with ash and fly ash has been extensively researched. Stable isotopes of lead can be used to trace lead sources. It is possible to monitor the presence, transformation pathways, and environmental impact of Pb by determining its isotopic composition in coal and fly ash. For the first time, the isotopic composition of selected coal samples from the Kolubara and Kostolac mines, as well as fly ash from the Kolubara (A and B), Kostolac (A and B), and Nikola Tesla (TENT A3, A2, B2) thermal power plants, was investigated in this study. The obtained data for 206Pb/207Pb in coal serve as the foundation for ranking domestic coals, whereas the isotopic ratios 206Pb/207Pb and 208Pb/207Pb  in fly ash can be used to monitor and control lead pollution from investigated sources.
T2  - Metallurgical and Materials Engineering
T1  - Contribution to the Serbian coal ranking and fly ash characterization using Pb isotopic ratio
VL  - 28
IS  - 4
SP  - 675
EP  - 684
DO  - 10.56801/MME931
ER  - 

@article{
author = "Đolić, Maja and Ćujić, Mirjana and Stanišić, Tijana and Čičkarić, Dragana and Ristić, Mirjana and Perić Grujić, Aleksandra",
year = "2022",
abstract = "The Republic of Serbia generates the majority of its electricity at the thermal power plants (TE) Nikola Tesla, Kolubara, and Kostolac. Coal is extracted from the Kolubara basin, which produces approximately 70% of lignite (an average of 30 million tons per year), and the Kostolac basin, which produces 30% of lignite. Ash, fly ash, and slag are examples of coal combustion residues. Because of the high content of potentially hazardous elements such as As, Pb, Cd, and Cr, environmental pollution with ash and fly ash has been extensively researched. Stable isotopes of lead can be used to trace lead sources. It is possible to monitor the presence, transformation pathways, and environmental impact of Pb by determining its isotopic composition in coal and fly ash. For the first time, the isotopic composition of selected coal samples from the Kolubara and Kostolac mines, as well as fly ash from the Kolubara (A and B), Kostolac (A and B), and Nikola Tesla (TENT A3, A2, B2) thermal power plants, was investigated in this study. The obtained data for 206Pb/207Pb in coal serve as the foundation for ranking domestic coals, whereas the isotopic ratios 206Pb/207Pb and 208Pb/207Pb  in fly ash can be used to monitor and control lead pollution from investigated sources.",
journal = "Metallurgical and Materials Engineering",
title = "Contribution to the Serbian coal ranking and fly ash characterization using Pb isotopic ratio",
volume = "28",
number = "4",
pages = "675-684",
doi = "10.56801/MME931"
}

Đolić, M., Ćujić, M., Stanišić, T., Čičkarić, D., Ristić, M.,& Perić Grujić, A.. (2022). Contribution to the Serbian coal ranking and fly ash characterization using Pb isotopic ratio. in Metallurgical and Materials Engineering, 28(4), 675-684.
https://doi.org/10.56801/MME931

Đolić M, Ćujić M, Stanišić T, Čičkarić D, Ristić M, Perić Grujić A. Contribution to the Serbian coal ranking and fly ash characterization using Pb isotopic ratio. in Metallurgical and Materials Engineering. 2022;28(4):675-684.
doi:10.56801/MME931 .

Đolić, Maja, Ćujić, Mirjana, Stanišić, Tijana, Čičkarić, Dragana, Ristić, Mirjana, Perić Grujić, Aleksandra, "Contribution to the Serbian coal ranking and fly ash characterization using Pb isotopic ratio" in Metallurgical and Materials Engineering, 28, no. 4 (2022):675-684,
https://doi.org/10.56801/MME931 . .

TY  - JOUR
AU  - Stanišić, Tijana
AU  - Đolić, Maja B.
AU  - Ćujić, Mirjana
AU  - Ristić, Mirjana
AU  - Perić Grujić, Aleksandra
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10512
AB  - This study investigated the use of different natural raw soil materials as low-cost adsorbents for the removal to remove As(V) and Pb(II) from aqueous systems. It deals with the effect of different soil textures, sandy loam, loam, and loamy sand, on adsorption efficiency. Fourier-transform infrared spectroscopy (FTIR) was used to carry out the comprehensive characterization of materials, as well as scanning electron microscopy (SEM), X-ray diffraction (XRD), and liquid nitrogen porosimetry or the Brunauer–Emmett–Teller (BET). Studies were performed in a batch system; the initial concentration of examined heavy metals was 100 μg·L–1, pH varied in the range of 4–6, and the adsorbent dosage was 5–20 mg/10 mL. Sandy loam was the most efficient adsor-bent for As(V) separation, with a maximum removal efficiency of 47.5%, while the loam was the most efficient for Pb(II) separation, with a maximum removal efficiency of 94.2%. The removal efficiency was affected mainly by the adsorbent characteristics. Performed kinetic studies revealed two steps of adsorption for both investigated ions. Obtained results indicate that natural sorbents used in this work present environmentally sustainable material for As(V) and Pb(II) removal, on the one hand, and the basis for further studies on the simultaneous removal of heavy metals from water and their reduced mobility in soil, on the other. © 2022 Desalination Publications.
T2  - Desalination and Water Treatment
T1  - Disparate soil textures as a native medium for As(V) and Pb(II) separation from aqueous systems
VL  - 273
SP  - 190
EP  - 202
DO  - 10.5004/dwt.2022.28889
ER  - 

@article{
author = "Stanišić, Tijana and Đolić, Maja B. and Ćujić, Mirjana and Ristić, Mirjana and Perić Grujić, Aleksandra",
year = "2022",
abstract = "This study investigated the use of different natural raw soil materials as low-cost adsorbents for the removal to remove As(V) and Pb(II) from aqueous systems. It deals with the effect of different soil textures, sandy loam, loam, and loamy sand, on adsorption efficiency. Fourier-transform infrared spectroscopy (FTIR) was used to carry out the comprehensive characterization of materials, as well as scanning electron microscopy (SEM), X-ray diffraction (XRD), and liquid nitrogen porosimetry or the Brunauer–Emmett–Teller (BET). Studies were performed in a batch system; the initial concentration of examined heavy metals was 100 μg·L–1, pH varied in the range of 4–6, and the adsorbent dosage was 5–20 mg/10 mL. Sandy loam was the most efficient adsor-bent for As(V) separation, with a maximum removal efficiency of 47.5%, while the loam was the most efficient for Pb(II) separation, with a maximum removal efficiency of 94.2%. The removal efficiency was affected mainly by the adsorbent characteristics. Performed kinetic studies revealed two steps of adsorption for both investigated ions. Obtained results indicate that natural sorbents used in this work present environmentally sustainable material for As(V) and Pb(II) removal, on the one hand, and the basis for further studies on the simultaneous removal of heavy metals from water and their reduced mobility in soil, on the other. © 2022 Desalination Publications.",
journal = "Desalination and Water Treatment",
title = "Disparate soil textures as a native medium for As(V) and Pb(II) separation from aqueous systems",
volume = "273",
pages = "190-202",
doi = "10.5004/dwt.2022.28889"
}

Stanišić, T., Đolić, M. B., Ćujić, M., Ristić, M.,& Perić Grujić, A.. (2022). Disparate soil textures as a native medium for As(V) and Pb(II) separation from aqueous systems. in Desalination and Water Treatment, 273, 190-202.
https://doi.org/10.5004/dwt.2022.28889

Stanišić T, Đolić MB, Ćujić M, Ristić M, Perić Grujić A. Disparate soil textures as a native medium for As(V) and Pb(II) separation from aqueous systems. in Desalination and Water Treatment. 2022;273:190-202.
doi:10.5004/dwt.2022.28889 .

Stanišić, Tijana, Đolić, Maja B., Ćujić, Mirjana, Ristić, Mirjana, Perić Grujić, Aleksandra, "Disparate soil textures as a native medium for As(V) and Pb(II) separation from aqueous systems" in Desalination and Water Treatment, 273 (2022):190-202,
https://doi.org/10.5004/dwt.2022.28889 . .

TY  - CONF
AU  - Stanišić, Tijana
AU  - Đolić, Maja
AU  - Kokunešoski, Maja
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11246
AB  - Cilj istraživanja ovog rada bio je ispitivanje mogućnosti primene prirodnihnemodifikovanih materijala kao adsorbenata za efikasno uklanjanje Pb2+ jona iz vode. Korišćenasu dva materijala čiji sastav čini smeša oksida SiO2, Al2O3 i Fe2O3. Na osnovu teksturneklasifikacije uzoraka, analizirani materijali spadaju u peskovitu ilovaču i ilovasti pesak. U okvirurada izvršena je karakterizacija materijala primenom rendgenske difrakcione analize (engl. X-RayDifraction, XRD) i infracrvene spektroskopije sa Furijeovom transformacijom (engl. Fourier-Transform Infrared Spectroscopy, FTIR). Proces adsorpcije Pb2+ jona na prirodnim materijalimaispitan je u šaržnom sistemu, variranjem mase adsorbenta i pH vrednosti rastvora. Peskovitailovača i ilovasti pesak pokazali su visoku efikasnost za uklanjanje Pb2+ jona iz vode, bez prethodnehemijske modfikacije. Efikasnost uklanjanja jona olova uz pomoć peskovite ilovače i ilovastogpesaka iznosi 88,2 % i 80,2 %, pri optimalnim uslovima (Ci (Pb2+)=100 μg L-1, mads=10 mg ipH=5). Dobijeni rezultati pokazuju i potvrđuju da se prirodni materijali na bazi oksida metalamogu koristiti kao efikasni adsorbenti za uklanjanje katjonskih oblika teških metala iz vode.
AB  - The aim of this study was to examine the possibility of using natural unmodified materialsas adsorbents for efficient removal of Pb2+ions from aqueous solution. Two raw materialscomposed of SiO2, Al2O3 and Fe2O3, were analyzed. According to the textural classification the tested materials belong to sandy loam and loamy sand. In this research, X-ray diffraction analysis (XRD) and Fourier-Transform infrared spectroscopy (FTIR) were used for structural characterization of the materials. The process of adsorption of Pb2+ ions onto natural materials was conducted in a batch system. In order to determine optimal conditions, the mass of the adsorbent and the pH value of the solution were varied. Sandy loam and loamy sand have shown high efficiency for removing Pb2+ions from aqueous solution, without previous chemical modification. The efficiency of removal of lead ions on sandy loam and loamy sand is 88.2% and 80.2%, respectively, under optimal conditions (Ci(Pb2+)=100 μg L-1, mads=10 mg and pH 5). This study confirms that natural materials based on metal oxides can be used as effective adsorbents toremove cationic species of heavy metals from water systems.
C3  - 6. Naučno-stručni skup Politehnika, Zbornik radova
T1  - Heterogeni prirodni materijali mineralne strukture kao efikasni adsorbenti za uklanjanje Pb2+ jona iz vode
T1  - Heterogeneous Natural Materials of Mineral Structure as Effective Adsorbents for Removal of Pb2+ Ions From Water
SP  - 149
EP  - 154
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11246
ER  - 

@conference{
author = "Stanišić, Tijana and Đolić, Maja and Kokunešoski, Maja and Ristić, Mirjana and Perić-Grujić, Aleksandra",
year = "2021",
abstract = "Cilj istraživanja ovog rada bio je ispitivanje mogućnosti primene prirodnihnemodifikovanih materijala kao adsorbenata za efikasno uklanjanje Pb2+ jona iz vode. Korišćenasu dva materijala čiji sastav čini smeša oksida SiO2, Al2O3 i Fe2O3. Na osnovu teksturneklasifikacije uzoraka, analizirani materijali spadaju u peskovitu ilovaču i ilovasti pesak. U okvirurada izvršena je karakterizacija materijala primenom rendgenske difrakcione analize (engl. X-RayDifraction, XRD) i infracrvene spektroskopije sa Furijeovom transformacijom (engl. Fourier-Transform Infrared Spectroscopy, FTIR). Proces adsorpcije Pb2+ jona na prirodnim materijalimaispitan je u šaržnom sistemu, variranjem mase adsorbenta i pH vrednosti rastvora. Peskovitailovača i ilovasti pesak pokazali su visoku efikasnost za uklanjanje Pb2+ jona iz vode, bez prethodnehemijske modfikacije. Efikasnost uklanjanja jona olova uz pomoć peskovite ilovače i ilovastogpesaka iznosi 88,2 % i 80,2 %, pri optimalnim uslovima (Ci (Pb2+)=100 μg L-1, mads=10 mg ipH=5). Dobijeni rezultati pokazuju i potvrđuju da se prirodni materijali na bazi oksida metalamogu koristiti kao efikasni adsorbenti za uklanjanje katjonskih oblika teških metala iz vode., The aim of this study was to examine the possibility of using natural unmodified materialsas adsorbents for efficient removal of Pb2+ions from aqueous solution. Two raw materialscomposed of SiO2, Al2O3 and Fe2O3, were analyzed. According to the textural classification the tested materials belong to sandy loam and loamy sand. In this research, X-ray diffraction analysis (XRD) and Fourier-Transform infrared spectroscopy (FTIR) were used for structural characterization of the materials. The process of adsorption of Pb2+ ions onto natural materials was conducted in a batch system. In order to determine optimal conditions, the mass of the adsorbent and the pH value of the solution were varied. Sandy loam and loamy sand have shown high efficiency for removing Pb2+ions from aqueous solution, without previous chemical modification. The efficiency of removal of lead ions on sandy loam and loamy sand is 88.2% and 80.2%, respectively, under optimal conditions (Ci(Pb2+)=100 μg L-1, mads=10 mg and pH 5). This study confirms that natural materials based on metal oxides can be used as effective adsorbents toremove cationic species of heavy metals from water systems.",
journal = "6. Naučno-stručni skup Politehnika, Zbornik radova",
title = "Heterogeni prirodni materijali mineralne strukture kao efikasni adsorbenti za uklanjanje Pb2+ jona iz vode, Heterogeneous Natural Materials of Mineral Structure as Effective Adsorbents for Removal of Pb2+ Ions From Water",
pages = "149-154",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11246"
}

Stanišić, T., Đolić, M., Kokunešoski, M., Ristić, M.,& Perić-Grujić, A.. (2021). Heterogeni prirodni materijali mineralne strukture kao efikasni adsorbenti za uklanjanje Pb2+ jona iz vode. in 6. Naučno-stručni skup Politehnika, Zbornik radova, 149-154.
https://hdl.handle.net/21.15107/rcub_vinar_11246

Stanišić T, Đolić M, Kokunešoski M, Ristić M, Perić-Grujić A. Heterogeni prirodni materijali mineralne strukture kao efikasni adsorbenti za uklanjanje Pb2+ jona iz vode. in 6. Naučno-stručni skup Politehnika, Zbornik radova. 2021;:149-154.
https://hdl.handle.net/21.15107/rcub_vinar_11246 .

Stanišić, Tijana, Đolić, Maja, Kokunešoski, Maja, Ristić, Mirjana, Perić-Grujić, Aleksandra, "Heterogeni prirodni materijali mineralne strukture kao efikasni adsorbenti za uklanjanje Pb2+ jona iz vode" in 6. Naučno-stručni skup Politehnika, Zbornik radova (2021):149-154,
https://hdl.handle.net/21.15107/rcub_vinar_11246 .

TY  - CONF
AU  - Stanišić, Tijana
AU  - Đolić, Maja
AU  - Ćujić, Mirjana
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11233
AB  - Olovo i arsen predstavljaju značajnu grupu neorganskih polutanata koji su prisutni uživotnoj sredini, pre svega u vodenim sistemima, pa je njihovo uklanjanje veliki tehničkotehnološki izazov. Zbog toga se sve više pažnje posvećuje razvoju pristupačnih, efikasnih iekološki prihvatljivih adsorbenata. Prirodni materijali na bazi oksida metala (SiO2, Al2O3,Fe2O3), poput ilovače, predstavljaju efikasne adsorbente za uklanjanje katjonskih i anjonskihvrsta iz vodenih rastvora. U ovom radu adsorpciona svojstva ilovače ispitivana su u šaržnomsistemu, promenom pH vrednosti početnog rastvora, dok su masa adsorbenta, vreme itemperature procesa bili konstantni. Značajnu ulogu u odvijanju adsorpcionog procesa ima pHvrednost rastvora, stoga se eksperiment zasnivao na određivanju efikasnosti procesa pri vrednostipH rastvora 4, 5 i 6. Strukturne karakteristike ilovače su određene primenom rendgenskedifrakcione analize (engl. X-Ray Difraction, XRD), infracrvenom spektroskopijom sa Furijeovomtransformacijom (engl. Fourier-Transform Infrared Spectroscopy, FTIR) i skenirajuće elektronskemikroskopije (engl. Scanning electron microscopy, SEM). Koncentracija jona nakon procesaadsorpcije određena je pomoću indukovano spregnute plazme sa masenom spektrometrijom (engl.Inductively Coupled Plasma Mass Spectrometry, ICP-MS). Maksimalna efikasnost uklanjanjajona olova postignuta je na pH vrednosti 5 (94,2 %), dok je za jone arsena optimalna pH vrednostbila 6 (35,1 %).
AB  - Lead and arsenic represent an important group of inorganic pollutants that can be found in the environment, primarily in aquatic systems. Their removal from water systems is a big environmental problem, but also a significant technological challenge. Therefore, an increasing attention is paid to the development of widely available, efficient and environmentally friendly adsorbents. Natural metal oxide-based materials (SiO2, Al2O3, Fe2O3), such as loam, are effective adsorbents for removal of cationic and anionic species. The adsorption experiments were performed in a batch system, varying the pH value of the initial solution, while the mass of adsorbent, time and temperature were constant. The influence of pH value has a leading influence to the adsorption process so the process efficiency was determined at the pH values set at: 4, 5 and 6. The structural characteristics of the loam was performed using X-ray diffraction analysis (XRD), Fourier-Transform Infrared Spectroscopy (FTIR) and scanning electron microscopy (SEM). The concentration of ions after their removal was determined using inductively coupled plasma mass spectrometry (ICP-MS). The maximum removal of lead ions was obtained at pH 5 (94.2%), while for arsenic ions, it was at pH 6 (35.1%).
PB  - Akademija tehničkih strukovnih studija Beograd
C3  - 6. Naučno-stručni skup Politehnika, Zbornik radova
T1  - Ispitivanje adsorpcionih svojstava ilovače za uklanjanje jona olova i arsena iz vodenih rastvora
SP  - 143
EP  - 148
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11233
ER  - 

@conference{
author = "Stanišić, Tijana and Đolić, Maja and Ćujić, Mirjana and Ristić, Mirjana and Perić-Grujić, Aleksandra",
year = "2021",
abstract = "Olovo i arsen predstavljaju značajnu grupu neorganskih polutanata koji su prisutni uživotnoj sredini, pre svega u vodenim sistemima, pa je njihovo uklanjanje veliki tehničkotehnološki izazov. Zbog toga se sve više pažnje posvećuje razvoju pristupačnih, efikasnih iekološki prihvatljivih adsorbenata. Prirodni materijali na bazi oksida metala (SiO2, Al2O3,Fe2O3), poput ilovače, predstavljaju efikasne adsorbente za uklanjanje katjonskih i anjonskihvrsta iz vodenih rastvora. U ovom radu adsorpciona svojstva ilovače ispitivana su u šaržnomsistemu, promenom pH vrednosti početnog rastvora, dok su masa adsorbenta, vreme itemperature procesa bili konstantni. Značajnu ulogu u odvijanju adsorpcionog procesa ima pHvrednost rastvora, stoga se eksperiment zasnivao na određivanju efikasnosti procesa pri vrednostipH rastvora 4, 5 i 6. Strukturne karakteristike ilovače su određene primenom rendgenskedifrakcione analize (engl. X-Ray Difraction, XRD), infracrvenom spektroskopijom sa Furijeovomtransformacijom (engl. Fourier-Transform Infrared Spectroscopy, FTIR) i skenirajuće elektronskemikroskopije (engl. Scanning electron microscopy, SEM). Koncentracija jona nakon procesaadsorpcije određena je pomoću indukovano spregnute plazme sa masenom spektrometrijom (engl.Inductively Coupled Plasma Mass Spectrometry, ICP-MS). Maksimalna efikasnost uklanjanjajona olova postignuta je na pH vrednosti 5 (94,2 %), dok je za jone arsena optimalna pH vrednostbila 6 (35,1 %)., Lead and arsenic represent an important group of inorganic pollutants that can be found in the environment, primarily in aquatic systems. Their removal from water systems is a big environmental problem, but also a significant technological challenge. Therefore, an increasing attention is paid to the development of widely available, efficient and environmentally friendly adsorbents. Natural metal oxide-based materials (SiO2, Al2O3, Fe2O3), such as loam, are effective adsorbents for removal of cationic and anionic species. The adsorption experiments were performed in a batch system, varying the pH value of the initial solution, while the mass of adsorbent, time and temperature were constant. The influence of pH value has a leading influence to the adsorption process so the process efficiency was determined at the pH values set at: 4, 5 and 6. The structural characteristics of the loam was performed using X-ray diffraction analysis (XRD), Fourier-Transform Infrared Spectroscopy (FTIR) and scanning electron microscopy (SEM). The concentration of ions after their removal was determined using inductively coupled plasma mass spectrometry (ICP-MS). The maximum removal of lead ions was obtained at pH 5 (94.2%), while for arsenic ions, it was at pH 6 (35.1%).",
publisher = "Akademija tehničkih strukovnih studija Beograd",
journal = "6. Naučno-stručni skup Politehnika, Zbornik radova",
title = "Ispitivanje adsorpcionih svojstava ilovače za uklanjanje jona olova i arsena iz vodenih rastvora",
pages = "143-148",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11233"
}

Stanišić, T., Đolić, M., Ćujić, M., Ristić, M.,& Perić-Grujić, A.. (2021). Ispitivanje adsorpcionih svojstava ilovače za uklanjanje jona olova i arsena iz vodenih rastvora. in 6. Naučno-stručni skup Politehnika, Zbornik radova
Akademija tehničkih strukovnih studija Beograd., 143-148.
https://hdl.handle.net/21.15107/rcub_vinar_11233

Stanišić T, Đolić M, Ćujić M, Ristić M, Perić-Grujić A. Ispitivanje adsorpcionih svojstava ilovače za uklanjanje jona olova i arsena iz vodenih rastvora. in 6. Naučno-stručni skup Politehnika, Zbornik radova. 2021;:143-148.
https://hdl.handle.net/21.15107/rcub_vinar_11233 .

Stanišić, Tijana, Đolić, Maja, Ćujić, Mirjana, Ristić, Mirjana, Perić-Grujić, Aleksandra, "Ispitivanje adsorpcionih svojstava ilovače za uklanjanje jona olova i arsena iz vodenih rastvora" in 6. Naučno-stručni skup Politehnika, Zbornik radova (2021):143-148,
https://hdl.handle.net/21.15107/rcub_vinar_11233 .

TY  - JOUR
AU  - Marjanović, Vesna
AU  - Perić-Grujić, Aleksandra A.
AU  - Ristić, Mirjana
AU  - Marinković, Aleksandar D.
AU  - Marković, Radmila
AU  - Onjia, Antonije E.
AU  - Šljivić-Ivanović, Marija Z.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9760
AB  - Hybrid adsorbent, based on the cross-linked copolymer impregnated with hydrous iron oxide, was applied for the first time for Se(VI) adsorption from water. The influence of the initial solution pH, selenate concentration and contact time to adsorption capacity was investigated. Adsorbent regeneration was explored using a full factorial experimental design in order to optimize the volume, initial pH value and concentration of the applied NaCl solution as a reagent. Equilibrium state was described using the Langmuir model, while kinetics fitted the pseudo-first order. The maximum adsorption capacity was found to be 28.8 mg/g. Desorption efficiency increased up to 70%, and became statistically significant with the reagent concentration and pH increase, while the applied solution volume was found to be insignificant in the investigated range. Based on the results obtained, pH influence to the adsorption capacity, desorption efficiency, Fourier transform infrared (FTIR) and X-ray diffraction (XRD) analysis of loaded adsorbent, it was concluded that the outer-and inner-sphere complexation are mechanisms responsible for Se(VI) separation from water. In addition to the experiments with synthetic solutions, the adsorbent performances in drinking water samples were explored, showing the purification efficiency up to 25%, depending on the initial Se(VI) concentration and water pH. Determined sorption capacity of the cross-linked copolymer impregnated with hydrous iron oxide and its ability for regeneration, candidate this material for further research, as a promising anionic species sorbent.
T2  - Metals
T1  - Selenate adsorption from water using the hydrous iron oxide-impregnated hybrid polymer
VL  - 10
IS  - 12
SP  - 1
EP  - 15
DO  - 10.3390/met10121630
ER  - 

@article{
author = "Marjanović, Vesna and Perić-Grujić, Aleksandra A. and Ristić, Mirjana and Marinković, Aleksandar D. and Marković, Radmila and Onjia, Antonije E. and Šljivić-Ivanović, Marija Z.",
year = "2020",
abstract = "Hybrid adsorbent, based on the cross-linked copolymer impregnated with hydrous iron oxide, was applied for the first time for Se(VI) adsorption from water. The influence of the initial solution pH, selenate concentration and contact time to adsorption capacity was investigated. Adsorbent regeneration was explored using a full factorial experimental design in order to optimize the volume, initial pH value and concentration of the applied NaCl solution as a reagent. Equilibrium state was described using the Langmuir model, while kinetics fitted the pseudo-first order. The maximum adsorption capacity was found to be 28.8 mg/g. Desorption efficiency increased up to 70%, and became statistically significant with the reagent concentration and pH increase, while the applied solution volume was found to be insignificant in the investigated range. Based on the results obtained, pH influence to the adsorption capacity, desorption efficiency, Fourier transform infrared (FTIR) and X-ray diffraction (XRD) analysis of loaded adsorbent, it was concluded that the outer-and inner-sphere complexation are mechanisms responsible for Se(VI) separation from water. In addition to the experiments with synthetic solutions, the adsorbent performances in drinking water samples were explored, showing the purification efficiency up to 25%, depending on the initial Se(VI) concentration and water pH. Determined sorption capacity of the cross-linked copolymer impregnated with hydrous iron oxide and its ability for regeneration, candidate this material for further research, as a promising anionic species sorbent.",
journal = "Metals",
title = "Selenate adsorption from water using the hydrous iron oxide-impregnated hybrid polymer",
volume = "10",
number = "12",
pages = "1-15",
doi = "10.3390/met10121630"
}

Marjanović, V., Perić-Grujić, A. A., Ristić, M., Marinković, A. D., Marković, R., Onjia, A. E.,& Šljivić-Ivanović, M. Z.. (2020). Selenate adsorption from water using the hydrous iron oxide-impregnated hybrid polymer. in Metals, 10(12), 1-15.
https://doi.org/10.3390/met10121630

Marjanović V, Perić-Grujić AA, Ristić M, Marinković AD, Marković R, Onjia AE, Šljivić-Ivanović MZ. Selenate adsorption from water using the hydrous iron oxide-impregnated hybrid polymer. in Metals. 2020;10(12):1-15.
doi:10.3390/met10121630 .

Marjanović, Vesna, Perić-Grujić, Aleksandra A., Ristić, Mirjana, Marinković, Aleksandar D., Marković, Radmila, Onjia, Antonije E., Šljivić-Ivanović, Marija Z., "Selenate adsorption from water using the hydrous iron oxide-impregnated hybrid polymer" in Metals, 10, no. 12 (2020):1-15,
https://doi.org/10.3390/met10121630 . .

TY  - JOUR
AU  - Egerić, Marija
AU  - Smičiklas, Ivana D.
AU  - Mraković, Ana Đ.
AU  - Jović, Mihajlo D.
AU  - Šljivić-Ivanović, Marija Z.
AU  - Antanasijević, Davor Z.
AU  - Ristić, Mirjana
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7657
AB  - BACKGROUNDSeashell waste (SW) is rich in biogenic calcium carbonate and potentially can substitute geological sources in various applications, such as the separation of heavy metals and radionuclides from contaminated solutions. This study aims to compare SW sorption efficiency towards different chemical species (Cu2+, Zn2+, Pb2+ and Sr2+) and to evaluate the effects of various factors based on the experimental data and modeling approach. RESULTSThe reaction of SW with aqueous metal solutions is a combination of several processes that result in metal retention, Ca2+ release, and changes in pH. SW demonstrates variable selectivity for investigated cations, depending on their concentrations and reaction times. Maximum sorption capacities declined in the order Zn2+ > Pb2+ approximate to Sr2+ > Cu2+. The model based on general regression neural network (GRNN) architecture was developed, which enabled prediction of removal efficiency taking into account the process specific, metal specific parameters and their non-linear interactions. Initial concentration and covalent radius of a cation exhibit the highest, while the initial pH the lowest significance. CONCLUSIONEcological problems caused by SW accumulation in coastal areas could be mitigated by mastering technologies for their practical utilization. The results obtained facilitate the understanding of cationic pollutants removal by SW in the range of experimental conditions, while the GRNN approach demonstrates advantages in modeling complex sorption processes. (c) 2017 Society of Chemical Industry
T2  - Journal of Chemical Technology & Biotechnology
T1  - Experimental and theoretical consideration of the factors influencing cationic pollutants retention by seashell waste
VL  - 93
IS  - 5
SP  - 1477
EP  - 1487
DO  - 10.1002/jctb.5516
ER  - 

@article{
author = "Egerić, Marija and Smičiklas, Ivana D. and Mraković, Ana Đ. and Jović, Mihajlo D. and Šljivić-Ivanović, Marija Z. and Antanasijević, Davor Z. and Ristić, Mirjana",
year = "2018",
abstract = "BACKGROUNDSeashell waste (SW) is rich in biogenic calcium carbonate and potentially can substitute geological sources in various applications, such as the separation of heavy metals and radionuclides from contaminated solutions. This study aims to compare SW sorption efficiency towards different chemical species (Cu2+, Zn2+, Pb2+ and Sr2+) and to evaluate the effects of various factors based on the experimental data and modeling approach. RESULTSThe reaction of SW with aqueous metal solutions is a combination of several processes that result in metal retention, Ca2+ release, and changes in pH. SW demonstrates variable selectivity for investigated cations, depending on their concentrations and reaction times. Maximum sorption capacities declined in the order Zn2+ > Pb2+ approximate to Sr2+ > Cu2+. The model based on general regression neural network (GRNN) architecture was developed, which enabled prediction of removal efficiency taking into account the process specific, metal specific parameters and their non-linear interactions. Initial concentration and covalent radius of a cation exhibit the highest, while the initial pH the lowest significance. CONCLUSIONEcological problems caused by SW accumulation in coastal areas could be mitigated by mastering technologies for their practical utilization. The results obtained facilitate the understanding of cationic pollutants removal by SW in the range of experimental conditions, while the GRNN approach demonstrates advantages in modeling complex sorption processes. (c) 2017 Society of Chemical Industry",
journal = "Journal of Chemical Technology & Biotechnology",
title = "Experimental and theoretical consideration of the factors influencing cationic pollutants retention by seashell waste",
volume = "93",
number = "5",
pages = "1477-1487",
doi = "10.1002/jctb.5516"
}

Egerić, M., Smičiklas, I. D., Mraković, A. Đ., Jović, M. D., Šljivić-Ivanović, M. Z., Antanasijević, D. Z.,& Ristić, M.. (2018). Experimental and theoretical consideration of the factors influencing cationic pollutants retention by seashell waste. in Journal of Chemical Technology & Biotechnology, 93(5), 1477-1487.
https://doi.org/10.1002/jctb.5516

Egerić M, Smičiklas ID, Mraković AĐ, Jović MD, Šljivić-Ivanović MZ, Antanasijević DZ, Ristić M. Experimental and theoretical consideration of the factors influencing cationic pollutants retention by seashell waste. in Journal of Chemical Technology & Biotechnology. 2018;93(5):1477-1487.
doi:10.1002/jctb.5516 .

Egerić, Marija, Smičiklas, Ivana D., Mraković, Ana Đ., Jović, Mihajlo D., Šljivić-Ivanović, Marija Z., Antanasijević, Davor Z., Ristić, Mirjana, "Experimental and theoretical consideration of the factors influencing cationic pollutants retention by seashell waste" in Journal of Chemical Technology & Biotechnology, 93, no. 5 (2018):1477-1487,
https://doi.org/10.1002/jctb.5516 . .

TY  - JOUR
AU  - Egerić, Marija
AU  - Smičiklas, Ivana D.
AU  - Mraković, Ana Đ.
AU  - Jović, Mihajlo D.
AU  - Šljivić-Ivanović, Marija Z.
AU  - Sokolović, Jovica
AU  - Ristić, Mirjana
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7986
AB  - The limestone and lime are agents widely used for separation of toxic metals from contaminated water. To reduce the exploitation of natural limestone deposits, appropriate replacements are sought out among the waste materials and by-products. Seashells, accumulated as an abundant waste in coastal areas, have high content of calcium carbonate and so far have shown high efficiency in neutralization and metal immobilization processes. In this study, the removal of Cu(II) ions was investigated using grounded seashell waste (a) without any pretreatment and (b) exposed to temperature treatment in the range 300-900 degrees C. The influence of temperature on the mineral phase transformation, solution pH and the removal efficiency of Cu(II) ions was monitored. Treatments at T > 500 degrees C exhibit positive effect on Cu(II) separation, with the samples partially or completely converted to calcium oxide being the most effective in the entire Cu(II) concentration range (6.34-639 mg/L). The efficiency of Cu(II) removal was largely associated with the effect on solution pH. The two level full factorial design was used to evaluate the significance of seashell composition (calcium carbonate vs. calcium oxide), granulation, dose and contact time, on the separation of Cu(II) and other cationic pollutants (Fe, Zn, Ni and Pb) from wastewater. The seashell dose and granulation, as well as their interaction, were generally the most influential factors. The variations in the levels of investigated factors had a substantial effect on the process through the indirect effect onto the solution pH. More than 99% of Cu(II) ions were separated at pH > 7, while the final pH range 8.2-12.2 was found optimal for total metal separation (97.6-98.9%).
T2  - Desalination and Water Treatment
T1  - Separation of Cu(II) ions from synthetic solutions and waste water by raw and calcined seashell waste
VL  - 132
SP  - 205
EP  - 214
DO  - 10.5004/dwt.2018.23131
ER  - 

@article{
author = "Egerić, Marija and Smičiklas, Ivana D. and Mraković, Ana Đ. and Jović, Mihajlo D. and Šljivić-Ivanović, Marija Z. and Sokolović, Jovica and Ristić, Mirjana",
year = "2018",
abstract = "The limestone and lime are agents widely used for separation of toxic metals from contaminated water. To reduce the exploitation of natural limestone deposits, appropriate replacements are sought out among the waste materials and by-products. Seashells, accumulated as an abundant waste in coastal areas, have high content of calcium carbonate and so far have shown high efficiency in neutralization and metal immobilization processes. In this study, the removal of Cu(II) ions was investigated using grounded seashell waste (a) without any pretreatment and (b) exposed to temperature treatment in the range 300-900 degrees C. The influence of temperature on the mineral phase transformation, solution pH and the removal efficiency of Cu(II) ions was monitored. Treatments at T > 500 degrees C exhibit positive effect on Cu(II) separation, with the samples partially or completely converted to calcium oxide being the most effective in the entire Cu(II) concentration range (6.34-639 mg/L). The efficiency of Cu(II) removal was largely associated with the effect on solution pH. The two level full factorial design was used to evaluate the significance of seashell composition (calcium carbonate vs. calcium oxide), granulation, dose and contact time, on the separation of Cu(II) and other cationic pollutants (Fe, Zn, Ni and Pb) from wastewater. The seashell dose and granulation, as well as their interaction, were generally the most influential factors. The variations in the levels of investigated factors had a substantial effect on the process through the indirect effect onto the solution pH. More than 99% of Cu(II) ions were separated at pH > 7, while the final pH range 8.2-12.2 was found optimal for total metal separation (97.6-98.9%).",
journal = "Desalination and Water Treatment",
title = "Separation of Cu(II) ions from synthetic solutions and waste water by raw and calcined seashell waste",
volume = "132",
pages = "205-214",
doi = "10.5004/dwt.2018.23131"
}

Egerić, M., Smičiklas, I. D., Mraković, A. Đ., Jović, M. D., Šljivić-Ivanović, M. Z., Sokolović, J.,& Ristić, M.. (2018). Separation of Cu(II) ions from synthetic solutions and waste water by raw and calcined seashell waste. in Desalination and Water Treatment, 132, 205-214.
https://doi.org/10.5004/dwt.2018.23131

Egerić M, Smičiklas ID, Mraković AĐ, Jović MD, Šljivić-Ivanović MZ, Sokolović J, Ristić M. Separation of Cu(II) ions from synthetic solutions and waste water by raw and calcined seashell waste. in Desalination and Water Treatment. 2018;132:205-214.
doi:10.5004/dwt.2018.23131 .

Egerić, Marija, Smičiklas, Ivana D., Mraković, Ana Đ., Jović, Mihajlo D., Šljivić-Ivanović, Marija Z., Sokolović, Jovica, Ristić, Mirjana, "Separation of Cu(II) ions from synthetic solutions and waste water by raw and calcined seashell waste" in Desalination and Water Treatment, 132 (2018):205-214,
https://doi.org/10.5004/dwt.2018.23131 . .

TY  - JOUR
AU  - Taleb, Khaled
AU  - Markovski, Jasmina S.
AU  - Milosavljevic, Milutin
AU  - Marinović-Cincović, Milena
AU  - Rusmirović, Jelena D.
AU  - Ristić, Mirjana
AU  - Marinković, Aleksandar D.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/704
AB  - Optimization of the synthesis of cross-linked macroporous polymer impregnated with hydrous iron oxide and post-process of obtained material by application of freeze/drying technique, produces high performance adsorbent applicable for efficient arsenic removal. Characterization and analysis of adsorbent performances encompass material characterization, equilibrium and kinetic study, influences of interfering ions and modeling of adsorption data in ion free and competitive conditions. Kinetic study, i.e. fitting by Weber-Morris model and single resistance mass transfer model predicts intra-particle diffusion as a rate-controlling step. Thermodynamic parameters indicate endothermic, feasible and spontaneous nature of adsorption process. Competitive kinetic study in the presence of interfering ions shows low detrimental effect on both capacity and kinetic of arsenic removal. Visual MINTEQ modeling software was used for the prediction of adsorbent performances and interfering ion influences. Preliminary fixed-bed column study was accomplished by the use of Bohart-Adams, Yoon-Nelson, Thomas and Modified dose-response model. High arsenic removal capacity of 31.0 mg g(-1), at 25 degrees C, and multi-cycle reusability of ER/DETA/FO/FD, significantly affects the affordability of techno-economic indicators based on the operating costs of the process. (C) 2015 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - Efficient arsenic removal by cross-linked macroporous polymer impregnated with hydrous iron oxide: Material performance
VL  - 279
SP  - 66
EP  - 78
DO  - 10.1016/j.cej.2015.04.147
ER  - 

@article{
author = "Taleb, Khaled and Markovski, Jasmina S. and Milosavljevic, Milutin and Marinović-Cincović, Milena and Rusmirović, Jelena D. and Ristić, Mirjana and Marinković, Aleksandar D.",
year = "2015",
abstract = "Optimization of the synthesis of cross-linked macroporous polymer impregnated with hydrous iron oxide and post-process of obtained material by application of freeze/drying technique, produces high performance adsorbent applicable for efficient arsenic removal. Characterization and analysis of adsorbent performances encompass material characterization, equilibrium and kinetic study, influences of interfering ions and modeling of adsorption data in ion free and competitive conditions. Kinetic study, i.e. fitting by Weber-Morris model and single resistance mass transfer model predicts intra-particle diffusion as a rate-controlling step. Thermodynamic parameters indicate endothermic, feasible and spontaneous nature of adsorption process. Competitive kinetic study in the presence of interfering ions shows low detrimental effect on both capacity and kinetic of arsenic removal. Visual MINTEQ modeling software was used for the prediction of adsorbent performances and interfering ion influences. Preliminary fixed-bed column study was accomplished by the use of Bohart-Adams, Yoon-Nelson, Thomas and Modified dose-response model. High arsenic removal capacity of 31.0 mg g(-1), at 25 degrees C, and multi-cycle reusability of ER/DETA/FO/FD, significantly affects the affordability of techno-economic indicators based on the operating costs of the process. (C) 2015 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "Efficient arsenic removal by cross-linked macroporous polymer impregnated with hydrous iron oxide: Material performance",
volume = "279",
pages = "66-78",
doi = "10.1016/j.cej.2015.04.147"
}

Taleb, K., Markovski, J. S., Milosavljevic, M., Marinović-Cincović, M., Rusmirović, J. D., Ristić, M.,& Marinković, A. D.. (2015). Efficient arsenic removal by cross-linked macroporous polymer impregnated with hydrous iron oxide: Material performance. in Chemical Engineering Journal, 279, 66-78.
https://doi.org/10.1016/j.cej.2015.04.147

Taleb K, Markovski JS, Milosavljevic M, Marinović-Cincović M, Rusmirović JD, Ristić M, Marinković AD. Efficient arsenic removal by cross-linked macroporous polymer impregnated with hydrous iron oxide: Material performance. in Chemical Engineering Journal. 2015;279:66-78.
doi:10.1016/j.cej.2015.04.147 .

Taleb, Khaled, Markovski, Jasmina S., Milosavljevic, Milutin, Marinović-Cincović, Milena, Rusmirović, Jelena D., Ristić, Mirjana, Marinković, Aleksandar D., "Efficient arsenic removal by cross-linked macroporous polymer impregnated with hydrous iron oxide: Material performance" in Chemical Engineering Journal, 279 (2015):66-78,
https://doi.org/10.1016/j.cej.2015.04.147 . .

TY  - JOUR
AU  - Markovski, Jasmina S.
AU  - Markovic, Dana D.
AU  - Đokić, Veljko R.
AU  - Mitrić, Miodrag
AU  - Ristić, Mirjana
AU  - Onjia, Antonije E.
AU  - Marinković, Aleksandar D.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5843
AB  - An efficient adsorbents for arsenate removal was developed by modification of calcined eggshell with goethite (calcined eggshell/goethite; sorbent 1), alpha-MnO2 (calcined eggshell/alpha-MnO2; sorbent 2) and hybride system goethite/alpha-MnO2 (calcined eggshell/goethite/alpha-MnO2; sorbent 3). Methods and processes for preparation of novel adsorbents were defined and obtained materials were characterized by BET, XRD, SEM and FTIR analysis. The influence of functionalization methods, solution pH, contact time, temperature, interfering ions and initial arsenate concentration on efficiencies of arsenate adsorption were studied in a batch system. Based on the orthogonal distance regression (ODR) fitting, using R-2, MARE and RMSRE statistical criteria, Langmuir and Sips equations were chosen for description of adsorption equilibriums on sorbents 1 and 3, respectively. The maximum adsorption capacities of 33.38 mg g(-1), 13.54 mg g(-1) and 47.04 mg g(-1) for sorbents 1-3, respectively, were obtained. Time-dependent study revealed that pseudo-second-order equation fitted well the kinetic data, while the Weber Morison model predicted intra-particle diffusion as main adsorption rate controlling step. Thermodynamic parameters indicated exothermic, feasible and spontaneous nature of adsorption process on sorbents I and 3. Results of Visual MINTEQ equilibrium speciation modeling program was used for studying pH, ionic strength and interfering ions influences on arsenate adsorption. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - Arsenate adsorption on waste eggshell modified by goethite, alpha-MnO2 and goethite/alpha-MnO2
VL  - 237
SP  - 430
EP  - 442
DO  - 10.1016/j.cej.2013.10.031
ER  - 

@article{
author = "Markovski, Jasmina S. and Markovic, Dana D. and Đokić, Veljko R. and Mitrić, Miodrag and Ristić, Mirjana and Onjia, Antonije E. and Marinković, Aleksandar D.",
year = "2014",
abstract = "An efficient adsorbents for arsenate removal was developed by modification of calcined eggshell with goethite (calcined eggshell/goethite; sorbent 1), alpha-MnO2 (calcined eggshell/alpha-MnO2; sorbent 2) and hybride system goethite/alpha-MnO2 (calcined eggshell/goethite/alpha-MnO2; sorbent 3). Methods and processes for preparation of novel adsorbents were defined and obtained materials were characterized by BET, XRD, SEM and FTIR analysis. The influence of functionalization methods, solution pH, contact time, temperature, interfering ions and initial arsenate concentration on efficiencies of arsenate adsorption were studied in a batch system. Based on the orthogonal distance regression (ODR) fitting, using R-2, MARE and RMSRE statistical criteria, Langmuir and Sips equations were chosen for description of adsorption equilibriums on sorbents 1 and 3, respectively. The maximum adsorption capacities of 33.38 mg g(-1), 13.54 mg g(-1) and 47.04 mg g(-1) for sorbents 1-3, respectively, were obtained. Time-dependent study revealed that pseudo-second-order equation fitted well the kinetic data, while the Weber Morison model predicted intra-particle diffusion as main adsorption rate controlling step. Thermodynamic parameters indicated exothermic, feasible and spontaneous nature of adsorption process on sorbents I and 3. Results of Visual MINTEQ equilibrium speciation modeling program was used for studying pH, ionic strength and interfering ions influences on arsenate adsorption. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "Arsenate adsorption on waste eggshell modified by goethite, alpha-MnO2 and goethite/alpha-MnO2",
volume = "237",
pages = "430-442",
doi = "10.1016/j.cej.2013.10.031"
}

Markovski, J. S., Markovic, D. D., Đokić, V. R., Mitrić, M., Ristić, M., Onjia, A. E.,& Marinković, A. D.. (2014). Arsenate adsorption on waste eggshell modified by goethite, alpha-MnO2 and goethite/alpha-MnO2. in Chemical Engineering Journal, 237, 430-442.
https://doi.org/10.1016/j.cej.2013.10.031

Markovski JS, Markovic DD, Đokić VR, Mitrić M, Ristić M, Onjia AE, Marinković AD. Arsenate adsorption on waste eggshell modified by goethite, alpha-MnO2 and goethite/alpha-MnO2. in Chemical Engineering Journal. 2014;237:430-442.
doi:10.1016/j.cej.2013.10.031 .

Markovski, Jasmina S., Markovic, Dana D., Đokić, Veljko R., Mitrić, Miodrag, Ristić, Mirjana, Onjia, Antonije E., Marinković, Aleksandar D., "Arsenate adsorption on waste eggshell modified by goethite, alpha-MnO2 and goethite/alpha-MnO2" in Chemical Engineering Journal, 237 (2014):430-442,
https://doi.org/10.1016/j.cej.2013.10.031 . .

TY  - JOUR
AU  - Jovanović, Željka
AU  - Radosavljević, Aleksandra
AU  - Kačarević-Popović, Zorica M.
AU  - Stojkovska, Jasmina
AU  - Perić-Grujić, Aleksandra A.
AU  - Ristić, Mirjana
AU  - Matić, Ivana Z.
AU  - Juranić, Zorica D.
AU  - Obradović, Bojana
AU  - Mišković-Stanković, Vesna B.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5379
AB  - Silver/poly(N-vinyl-2-pyrrolidone) (Ag/PVP) nanocomposites containing Ag nanoparticles at different concentrations were synthesized using gamma-irradiation. Cytotoxicity of the obtained nanocomposites was determined by MU assay in monolayer cultures of normal human immunocompetent peripheral blood mononuclear cells (PBMC) that were either non-stimulated or stimulated to proliferate by mitogen phytohemagglutinin (PHA), as well as in human cervix adenocarcinoma cell (HeLa) cultures. Silver release kinetics and mechanical properties of nanocomposites were investigated under bioreactor conditions in the simulated body fluid (SBF) at 37 degrees C. The release of silver was monitored under static conditions, and in two types of bioreactors: perfusion bioreactors and a bioreactor with dynamic compression coupled with SBF perfusion simulating in vivo conditions in articular cartilage. Ag/PVP nanocomposites exhibited slight cytotoxic effects against PBMC at the estimated concentration of 0.4 mu mol dm(-3), with negligible variations observed amongst different cell cultures investigated. Studies of the silver release kinetics indicated internal diffusion as the rate limiting step, determined by statistically comparable results obtained at all investigated conditions. However, silver release rate was slightly higher in the bioreactor with dynamic compression coupled with SBF perfusion as compared to the other two systems indicating the influence of dynamic compression. Modelling of silver release kinetics revealed potentials for optimization of Ag/PVP nanocomposites for particular applications as wound dressings or soft tissue implants. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Colloids and Surfaces. B: Biointerfaces
T1  - Bioreactor validation and biocompatibility of Ag/poly(N-vinyl-2-pyrrolidone) hydrogel nanocomposites
VL  - 105
SP  - 230
EP  - 235
DO  - 10.1016/j.colsurfb.2012.12.055
ER  - 

@article{
author = "Jovanović, Željka and Radosavljević, Aleksandra and Kačarević-Popović, Zorica M. and Stojkovska, Jasmina and Perić-Grujić, Aleksandra A. and Ristić, Mirjana and Matić, Ivana Z. and Juranić, Zorica D. and Obradović, Bojana and Mišković-Stanković, Vesna B.",
year = "2013",
abstract = "Silver/poly(N-vinyl-2-pyrrolidone) (Ag/PVP) nanocomposites containing Ag nanoparticles at different concentrations were synthesized using gamma-irradiation. Cytotoxicity of the obtained nanocomposites was determined by MU assay in monolayer cultures of normal human immunocompetent peripheral blood mononuclear cells (PBMC) that were either non-stimulated or stimulated to proliferate by mitogen phytohemagglutinin (PHA), as well as in human cervix adenocarcinoma cell (HeLa) cultures. Silver release kinetics and mechanical properties of nanocomposites were investigated under bioreactor conditions in the simulated body fluid (SBF) at 37 degrees C. The release of silver was monitored under static conditions, and in two types of bioreactors: perfusion bioreactors and a bioreactor with dynamic compression coupled with SBF perfusion simulating in vivo conditions in articular cartilage. Ag/PVP nanocomposites exhibited slight cytotoxic effects against PBMC at the estimated concentration of 0.4 mu mol dm(-3), with negligible variations observed amongst different cell cultures investigated. Studies of the silver release kinetics indicated internal diffusion as the rate limiting step, determined by statistically comparable results obtained at all investigated conditions. However, silver release rate was slightly higher in the bioreactor with dynamic compression coupled with SBF perfusion as compared to the other two systems indicating the influence of dynamic compression. Modelling of silver release kinetics revealed potentials for optimization of Ag/PVP nanocomposites for particular applications as wound dressings or soft tissue implants. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Colloids and Surfaces. B: Biointerfaces",
title = "Bioreactor validation and biocompatibility of Ag/poly(N-vinyl-2-pyrrolidone) hydrogel nanocomposites",
volume = "105",
pages = "230-235",
doi = "10.1016/j.colsurfb.2012.12.055"
}

Jovanović, Ž., Radosavljević, A., Kačarević-Popović, Z. M., Stojkovska, J., Perić-Grujić, A. A., Ristić, M., Matić, I. Z., Juranić, Z. D., Obradović, B.,& Mišković-Stanković, V. B.. (2013). Bioreactor validation and biocompatibility of Ag/poly(N-vinyl-2-pyrrolidone) hydrogel nanocomposites. in Colloids and Surfaces. B: Biointerfaces, 105, 230-235.
https://doi.org/10.1016/j.colsurfb.2012.12.055

Jovanović Ž, Radosavljević A, Kačarević-Popović ZM, Stojkovska J, Perić-Grujić AA, Ristić M, Matić IZ, Juranić ZD, Obradović B, Mišković-Stanković VB. Bioreactor validation and biocompatibility of Ag/poly(N-vinyl-2-pyrrolidone) hydrogel nanocomposites. in Colloids and Surfaces. B: Biointerfaces. 2013;105:230-235.
doi:10.1016/j.colsurfb.2012.12.055 .

Jovanović, Željka, Radosavljević, Aleksandra, Kačarević-Popović, Zorica M., Stojkovska, Jasmina, Perić-Grujić, Aleksandra A., Ristić, Mirjana, Matić, Ivana Z., Juranić, Zorica D., Obradović, Bojana, Mišković-Stanković, Vesna B., "Bioreactor validation and biocompatibility of Ag/poly(N-vinyl-2-pyrrolidone) hydrogel nanocomposites" in Colloids and Surfaces. B: Biointerfaces, 105 (2013):230-235,
https://doi.org/10.1016/j.colsurfb.2012.12.055 . .

TY  - JOUR
AU  - Milosavljevic, Nedeljko B.
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra A.
AU  - Filipović, Jovanka M.
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
AU  - Kalagasidis Krušić, Melina
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4438
AB  - Novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid were applied as adsorbents for the removal of Zn(2+) ions from aqueous solution. In batch tests, the influence of solution pH, contact time, initial metal ion concentration and temperature was examined. The sorption was found pH dependent, pH 5.5 being the optimum value. The adsorption process was well described by the pseudosecond order kinetic. The hydrogels were characterized by spectral (Fourier transform infrared-FTIR) and structural (SEM/EDX and atomic force microscopy-AFM) analyses. The surface topography changes were observed by atomic force microscopy, while the changes in surface composition were detected using phase imaging AFM. The negative values of free energy and enthalpy indicated that the adsorption is spontaneous and exothermic one. The best fitting isotherms were Langmuir and Redlich-Peterson and it was found that both linear and nonlinear methods were appropriate for obtaining the isotherm parameters. However, the increase of temperature leads to higher adsorption capacity, since swelling degree increased with temperature. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Journal of Hazardous Materials
T1  - Sorption of zinc by novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid
VL  - 192
IS  - 2
SP  - 846
EP  - 854
DO  - 10.1016/j.jhazmat.2011.05.093
ER  - 

@article{
author = "Milosavljevic, Nedeljko B. and Ristić, Mirjana and Perić-Grujić, Aleksandra A. and Filipović, Jovanka M. and Štrbac, Svetlana and Rakočević, Zlatko Lj. and Kalagasidis Krušić, Melina",
year = "2011",
abstract = "Novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid were applied as adsorbents for the removal of Zn(2+) ions from aqueous solution. In batch tests, the influence of solution pH, contact time, initial metal ion concentration and temperature was examined. The sorption was found pH dependent, pH 5.5 being the optimum value. The adsorption process was well described by the pseudosecond order kinetic. The hydrogels were characterized by spectral (Fourier transform infrared-FTIR) and structural (SEM/EDX and atomic force microscopy-AFM) analyses. The surface topography changes were observed by atomic force microscopy, while the changes in surface composition were detected using phase imaging AFM. The negative values of free energy and enthalpy indicated that the adsorption is spontaneous and exothermic one. The best fitting isotherms were Langmuir and Redlich-Peterson and it was found that both linear and nonlinear methods were appropriate for obtaining the isotherm parameters. However, the increase of temperature leads to higher adsorption capacity, since swelling degree increased with temperature. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Journal of Hazardous Materials",
title = "Sorption of zinc by novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid",
volume = "192",
number = "2",
pages = "846-854",
doi = "10.1016/j.jhazmat.2011.05.093"
}

Milosavljevic, N. B., Ristić, M., Perić-Grujić, A. A., Filipović, J. M., Štrbac, S., Rakočević, Z. Lj.,& Kalagasidis Krušić, M.. (2011). Sorption of zinc by novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid. in Journal of Hazardous Materials, 192(2), 846-854.
https://doi.org/10.1016/j.jhazmat.2011.05.093

Milosavljevic NB, Ristić M, Perić-Grujić AA, Filipović JM, Štrbac S, Rakočević ZL, Kalagasidis Krušić M. Sorption of zinc by novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid. in Journal of Hazardous Materials. 2011;192(2):846-854.
doi:10.1016/j.jhazmat.2011.05.093 .

Milosavljevic, Nedeljko B., Ristić, Mirjana, Perić-Grujić, Aleksandra A., Filipović, Jovanka M., Štrbac, Svetlana, Rakočević, Zlatko Lj., Kalagasidis Krušić, Melina, "Sorption of zinc by novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid" in Journal of Hazardous Materials, 192, no. 2 (2011):846-854,
https://doi.org/10.1016/j.jhazmat.2011.05.093 . .

TY  - JOUR
AU  - Milosavljevic, Nedeljko B.
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra A.
AU  - Filipović, Jovanka M.
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
AU  - Kalagasidis Krušić, Melina
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4533
AB  - A removal of Cu2+ ions from aqueous solutions onto hydrogels of chitosan. itaconic and methacrylic acid has been investigated using batch adsorption technique. The extent of adsorption was investigated as a function of pH, adsorbent dose, initial metal ion concentration, contact time and temperature. The FIR spectra showed that -NH2, -OH and -COOH groups are involved in the Cu2+ ions adsorption. The surface topography changes were observed by AFM, where the phase images indicated that sorption takes place on the surface of the hydrogel and in the bulk. Pseudo-first order, pseudo-second order and intraparticle diffusion models were analyzed and showed that the Cu2+ ions adsorption followed pseudo-second order kinetics. The equilibrium data were analyzed using Langmuir, Freundlich and Redlich-Peterson isotherms and the best interpretation was given by Redlich-Peterson. The adsorption capacity was found to be 122.59 mg/g, based on the non-linear Langmuir isotherm. Based on the separation factor. R-L, the Cu2+ ion adsorption is favorable, while the low activation energies indicate physisorption. Desorption experiments, done with a nitric acid, showed that the investigated hydrogels could be reused without significant losses of the initial properties even after three adsorption-sorption cycles. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Colloids and Surfaces. A: Physicochemical and Engineering Aspects
T1  - Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study
VL  - 388
IS  - 1-3
SP  - 59
EP  - 69
DO  - 10.1016/j.colsurfa.2011.08.011
ER  - 

@article{
author = "Milosavljevic, Nedeljko B. and Ristić, Mirjana and Perić-Grujić, Aleksandra A. and Filipović, Jovanka M. and Štrbac, Svetlana and Rakočević, Zlatko Lj. and Kalagasidis Krušić, Melina",
year = "2011",
abstract = "A removal of Cu2+ ions from aqueous solutions onto hydrogels of chitosan. itaconic and methacrylic acid has been investigated using batch adsorption technique. The extent of adsorption was investigated as a function of pH, adsorbent dose, initial metal ion concentration, contact time and temperature. The FIR spectra showed that -NH2, -OH and -COOH groups are involved in the Cu2+ ions adsorption. The surface topography changes were observed by AFM, where the phase images indicated that sorption takes place on the surface of the hydrogel and in the bulk. Pseudo-first order, pseudo-second order and intraparticle diffusion models were analyzed and showed that the Cu2+ ions adsorption followed pseudo-second order kinetics. The equilibrium data were analyzed using Langmuir, Freundlich and Redlich-Peterson isotherms and the best interpretation was given by Redlich-Peterson. The adsorption capacity was found to be 122.59 mg/g, based on the non-linear Langmuir isotherm. Based on the separation factor. R-L, the Cu2+ ion adsorption is favorable, while the low activation energies indicate physisorption. Desorption experiments, done with a nitric acid, showed that the investigated hydrogels could be reused without significant losses of the initial properties even after three adsorption-sorption cycles. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Colloids and Surfaces. A: Physicochemical and Engineering Aspects",
title = "Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study",
volume = "388",
number = "1-3",
pages = "59-69",
doi = "10.1016/j.colsurfa.2011.08.011"
}

Milosavljevic, N. B., Ristić, M., Perić-Grujić, A. A., Filipović, J. M., Štrbac, S., Rakočević, Z. Lj.,& Kalagasidis Krušić, M.. (2011). Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 388(1-3), 59-69.
https://doi.org/10.1016/j.colsurfa.2011.08.011

Milosavljevic NB, Ristić M, Perić-Grujić AA, Filipović JM, Štrbac S, Rakočević ZL, Kalagasidis Krušić M. Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects. 2011;388(1-3):59-69.
doi:10.1016/j.colsurfa.2011.08.011 .

Milosavljevic, Nedeljko B., Ristić, Mirjana, Perić-Grujić, Aleksandra A., Filipović, Jovanka M., Štrbac, Svetlana, Rakočević, Zlatko Lj., Kalagasidis Krušić, Melina, "Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study" in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 388, no. 1-3 (2011):59-69,
https://doi.org/10.1016/j.colsurfa.2011.08.011 . .

TY  - JOUR
AU  - Milosavljevic, Nedeljko B.
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra A.
AU  - Filipović, Jovanka M.
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
AU  - Kalagasidis Krušić, Melina
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4173
AB  - A hydrogel has been synthesized by ionic crosslinking of chitosan (Ch) with itaconic acid (IA), followed by a free radical polymerization and crosslinking of Ch/IA network by adding methacrylic acid and the crosslinker. The resulting material (Ch/IA/MAA hydrogel) was characterized by spectral (Fourier transform infrared (FTIR)), thermal (thermogravimetric analysis (TGA)) and structural (SEM/EDX and atomic force microscopy (AFM)) analyses. The prepared hydrogel was investigated as potential adsorbent for removal of Cd2+ ions from aqueous solution. The effect of various physico-chemical parameters such as pH, adsorbent dosage, adsorbate concentration and contact time was studied in batch experiments. The results of spectral analyses of Cd-loaded hydrogel have shown that active functional groups are -NH2, -OH and -COOH. SEM/EDX analysis and AFM surface topography and phase images indicated that apart from the adsorption on the surface of the hydrogel, sorption takes place in the bulk, as well. The experimental kinetic and equilibrium data were better fitted by pseudo-second order kinetic model and Langmuir adsorption isotherm. The parameters obtained in thermodynamic studies showed that the adsorption of Cd2+ on Ch/IA/MAA hydrogel was spontaneous and exothermic in nature. Desorption studies were carried out using acid leaching (HNO3) and it has been shown that the regenerated hydrogel can be reused three times without any loss of adsorption capacity. The maximum adsorption of 285.7 mg/g has been obtained at pH 5.5 and the results of adsorption/desorption experiments implies that the Ch/IA/MAA hydrogel may be used as efficient sorbent for removal of Cd2+ ions from aqueous solution. (C) 2010 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - Hydrogel based on chitosan, itaconic acid and methacrylic acid as adsorbent of Cd2+ ions from aqueous solution
VL  - 165
IS  - 2
SP  - 554
EP  - 562
DO  - 10.1016/j.cej.2010.09.072
ER  - 

@article{
author = "Milosavljevic, Nedeljko B. and Ristić, Mirjana and Perić-Grujić, Aleksandra A. and Filipović, Jovanka M. and Štrbac, Svetlana and Rakočević, Zlatko Lj. and Kalagasidis Krušić, Melina",
year = "2010",
abstract = "A hydrogel has been synthesized by ionic crosslinking of chitosan (Ch) with itaconic acid (IA), followed by a free radical polymerization and crosslinking of Ch/IA network by adding methacrylic acid and the crosslinker. The resulting material (Ch/IA/MAA hydrogel) was characterized by spectral (Fourier transform infrared (FTIR)), thermal (thermogravimetric analysis (TGA)) and structural (SEM/EDX and atomic force microscopy (AFM)) analyses. The prepared hydrogel was investigated as potential adsorbent for removal of Cd2+ ions from aqueous solution. The effect of various physico-chemical parameters such as pH, adsorbent dosage, adsorbate concentration and contact time was studied in batch experiments. The results of spectral analyses of Cd-loaded hydrogel have shown that active functional groups are -NH2, -OH and -COOH. SEM/EDX analysis and AFM surface topography and phase images indicated that apart from the adsorption on the surface of the hydrogel, sorption takes place in the bulk, as well. The experimental kinetic and equilibrium data were better fitted by pseudo-second order kinetic model and Langmuir adsorption isotherm. The parameters obtained in thermodynamic studies showed that the adsorption of Cd2+ on Ch/IA/MAA hydrogel was spontaneous and exothermic in nature. Desorption studies were carried out using acid leaching (HNO3) and it has been shown that the regenerated hydrogel can be reused three times without any loss of adsorption capacity. The maximum adsorption of 285.7 mg/g has been obtained at pH 5.5 and the results of adsorption/desorption experiments implies that the Ch/IA/MAA hydrogel may be used as efficient sorbent for removal of Cd2+ ions from aqueous solution. (C) 2010 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "Hydrogel based on chitosan, itaconic acid and methacrylic acid as adsorbent of Cd2+ ions from aqueous solution",
volume = "165",
number = "2",
pages = "554-562",
doi = "10.1016/j.cej.2010.09.072"
}

Milosavljevic, N. B., Ristić, M., Perić-Grujić, A. A., Filipović, J. M., Štrbac, S., Rakočević, Z. Lj.,& Kalagasidis Krušić, M.. (2010). Hydrogel based on chitosan, itaconic acid and methacrylic acid as adsorbent of Cd2+ ions from aqueous solution. in Chemical Engineering Journal, 165(2), 554-562.
https://doi.org/10.1016/j.cej.2010.09.072

Milosavljevic NB, Ristić M, Perić-Grujić AA, Filipović JM, Štrbac S, Rakočević ZL, Kalagasidis Krušić M. Hydrogel based on chitosan, itaconic acid and methacrylic acid as adsorbent of Cd2+ ions from aqueous solution. in Chemical Engineering Journal. 2010;165(2):554-562.
doi:10.1016/j.cej.2010.09.072 .

Milosavljevic, Nedeljko B., Ristić, Mirjana, Perić-Grujić, Aleksandra A., Filipović, Jovanka M., Štrbac, Svetlana, Rakočević, Zlatko Lj., Kalagasidis Krušić, Melina, "Hydrogel based on chitosan, itaconic acid and methacrylic acid as adsorbent of Cd2+ ions from aqueous solution" in Chemical Engineering Journal, 165, no. 2 (2010):554-562,
https://doi.org/10.1016/j.cej.2010.09.072 . .

TY  - JOUR
AU  - Šiljić, Aleksandra
AU  - Ružić, Jovana
AU  - Knežević, Milena
AU  - Maksimović, Ana
AU  - Pocajt, Viktor
AU  - Ristić, Mirjana
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11253
AB  - Rapid population growth, urbanization and industrial growth have led to severe waste management problems in the cities of developing countries. The improper management of municipal solid waste is a major source of air, land and water pollution, and poses risks to human health and the environment. This article examines the current situation in the management of municipal solid waste in Belgrade, the impact of globalization on the waste generation, discusses lessons learned, and proposes a system for the proper management of municipal solid wastes. Considering the high proportion of organic matter in the waste generated in Belgrade (typically over 45%), composting can be an option to reduce the amount of waste that is land filled, thus extending the lifespan of municipal landfills. Also composting recycles nutrients by returning them back to the soil. Source separation of organic matter at households should be implemented in order to obtain high quality of the resulting compost. .
AB  - Porast broja stanovnika, urbanizacija i industrijalizacija doveli su do intenziviranja problema u oblasti upravljanja komunalnim čvrstim otpadom u zemljama u razvoju. Usled nepravilnog rukovanja otpadom dolazi do emisije zagađujućih materija u vazduh, vodu i zemljište, što za posledicu ima negativan uticaj na zdravlje ljudi i na životnu sredinu. U ovom radu izvršena je analiza trenutne situacije u Beogradu u oblasti upravljanja otpadom. U skladu sa dobijenim podacima i na osnovu ispitivanja sastava otpad preporučena su odgovarajuća savremena rešenja. Zbog visokog udela bio-otpada (više od 45 %), kompostiranje je pogodna metoda kojom bi se obezbedilo smanjenje količine otpada koji se deponuje, čime bi se produžio radni vek deponije. Takođe se kompostiranjem obezbeđuje kruženje materije u prirodi i nutrijenti se vraćaju u zemljište. Odvojeno sakupljanje, na izvoru razdvojenog biootpada, je preduslov za dobijanje kvalitetnog komposta. .
PB  - Naučno-stručno društvo za zaštitu životne sredine Srbije - Ecologica, Beograd
T2  - Ecologica
T1  - Natural resources protection by municipal solid waste recycling
T1  - Očuvanje prirodnih resursa reciklažom materijala iz komunalnog otpada
VL  - 16
IS  - 54
SP  - 169
EP  - 172
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11253
ER  - 

@article{
author = "Šiljić, Aleksandra and Ružić, Jovana and Knežević, Milena and Maksimović, Ana and Pocajt, Viktor and Ristić, Mirjana",
year = "2009",
abstract = "Rapid population growth, urbanization and industrial growth have led to severe waste management problems in the cities of developing countries. The improper management of municipal solid waste is a major source of air, land and water pollution, and poses risks to human health and the environment. This article examines the current situation in the management of municipal solid waste in Belgrade, the impact of globalization on the waste generation, discusses lessons learned, and proposes a system for the proper management of municipal solid wastes. Considering the high proportion of organic matter in the waste generated in Belgrade (typically over 45%), composting can be an option to reduce the amount of waste that is land filled, thus extending the lifespan of municipal landfills. Also composting recycles nutrients by returning them back to the soil. Source separation of organic matter at households should be implemented in order to obtain high quality of the resulting compost. ., Porast broja stanovnika, urbanizacija i industrijalizacija doveli su do intenziviranja problema u oblasti upravljanja komunalnim čvrstim otpadom u zemljama u razvoju. Usled nepravilnog rukovanja otpadom dolazi do emisije zagađujućih materija u vazduh, vodu i zemljište, što za posledicu ima negativan uticaj na zdravlje ljudi i na životnu sredinu. U ovom radu izvršena je analiza trenutne situacije u Beogradu u oblasti upravljanja otpadom. U skladu sa dobijenim podacima i na osnovu ispitivanja sastava otpad preporučena su odgovarajuća savremena rešenja. Zbog visokog udela bio-otpada (više od 45 %), kompostiranje je pogodna metoda kojom bi se obezbedilo smanjenje količine otpada koji se deponuje, čime bi se produžio radni vek deponije. Takođe se kompostiranjem obezbeđuje kruženje materije u prirodi i nutrijenti se vraćaju u zemljište. Odvojeno sakupljanje, na izvoru razdvojenog biootpada, je preduslov za dobijanje kvalitetnog komposta. .",
publisher = "Naučno-stručno društvo za zaštitu životne sredine Srbije - Ecologica, Beograd",
journal = "Ecologica",
title = "Natural resources protection by municipal solid waste recycling, Očuvanje prirodnih resursa reciklažom materijala iz komunalnog otpada",
volume = "16",
number = "54",
pages = "169-172",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11253"
}

Šiljić, A., Ružić, J., Knežević, M., Maksimović, A., Pocajt, V.,& Ristić, M.. (2009). Natural resources protection by municipal solid waste recycling. in Ecologica
Naučno-stručno društvo za zaštitu životne sredine Srbije - Ecologica, Beograd., 16(54), 169-172.
https://hdl.handle.net/21.15107/rcub_vinar_11253

Šiljić A, Ružić J, Knežević M, Maksimović A, Pocajt V, Ristić M. Natural resources protection by municipal solid waste recycling. in Ecologica. 2009;16(54):169-172.
https://hdl.handle.net/21.15107/rcub_vinar_11253 .

Šiljić, Aleksandra, Ružić, Jovana, Knežević, Milena, Maksimović, Ana, Pocajt, Viktor, Ristić, Mirjana, "Natural resources protection by municipal solid waste recycling" in Ecologica, 16, no. 54 (2009):169-172,
https://hdl.handle.net/21.15107/rcub_vinar_11253 .