TY  - JOUR
AU  - Pantović-Spajić, Katarina
AU  - Marković, Branislav
AU  - Pavlović, Miroslav M.
AU  - Sokić, Miroslav
AU  - Zildžović, Snežana
AU  - Đorđević, Nataša
AU  - Stojanović, Ksenija A.
PY  - 2021
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/4845
AB  - The study is focused on the determination of the most effective chemical leaching process for the simultaneous demineralization/deashing and desulfurization of subbituminous coal from the Bogovina Basin. Coal was treated for 30 min, at different temperatures, using variable concentrations of hydrochloric, nitric, acetic and citric acids; hydrogen peroxide, mixture of hydrogen peroxide and nitric acid (pH 2), as well as by the stepwise leaching process (nitric acid + mixture of hydrogen peroxide and nitric acid, pH 2). The changes in mineral composition, caused by the chemical leaching, are followed using X-ray diffraction, whereas alterations of coal organic matter are tracked by Fourier-transform infrared spectroscopy and the content of fixed carbon. Inorganic acid leaching, regardless of the temperature and acid concentration, enabled the successful deashing of coal, whereas the percent of desulfurization was insufficient. The organic acid leaching was not satisfactory for both, deashing and desulfurization. Leaching by H2O2 and H2O2/HNO3 mixture (pH 2) resulted in moderate desulfurization, but the ash reduction was low. The most suitable method for the simultaneous effective ash (78 wt.%) and the sulfur (66 wt. %) removal from Bogovina coal is the two-step leaching, combining 10 vol. % HNO3 and mixture of 35 vol. % H2O2/10 vol. % HNO3 of pH 2 at 60°C.
PB  - Belgrade : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Deashing and desulfurization of subbituminous coal from the East field (Bogovina Basin, Serbia) - insights from chemical leaching
VL  - 86
IS  - 11
SP  - 1113
EP  - 1126
DO  - 10.2298/JSC210719061P
ER  - 

@article{
author = "Pantović-Spajić, Katarina and Marković, Branislav and Pavlović, Miroslav M. and Sokić, Miroslav and Zildžović, Snežana and Đorđević, Nataša and Stojanović, Ksenija A.",
year = "2021",
abstract = "The study is focused on the determination of the most effective chemical leaching process for the simultaneous demineralization/deashing and desulfurization of subbituminous coal from the Bogovina Basin. Coal was treated for 30 min, at different temperatures, using variable concentrations of hydrochloric, nitric, acetic and citric acids; hydrogen peroxide, mixture of hydrogen peroxide and nitric acid (pH 2), as well as by the stepwise leaching process (nitric acid + mixture of hydrogen peroxide and nitric acid, pH 2). The changes in mineral composition, caused by the chemical leaching, are followed using X-ray diffraction, whereas alterations of coal organic matter are tracked by Fourier-transform infrared spectroscopy and the content of fixed carbon. Inorganic acid leaching, regardless of the temperature and acid concentration, enabled the successful deashing of coal, whereas the percent of desulfurization was insufficient. The organic acid leaching was not satisfactory for both, deashing and desulfurization. Leaching by H2O2 and H2O2/HNO3 mixture (pH 2) resulted in moderate desulfurization, but the ash reduction was low. The most suitable method for the simultaneous effective ash (78 wt.%) and the sulfur (66 wt. %) removal from Bogovina coal is the two-step leaching, combining 10 vol. % HNO3 and mixture of 35 vol. % H2O2/10 vol. % HNO3 of pH 2 at 60°C.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Deashing and desulfurization of subbituminous coal from the East field (Bogovina Basin, Serbia) - insights from chemical leaching",
volume = "86",
number = "11",
pages = "1113-1126",
doi = "10.2298/JSC210719061P"
}

Pantović-Spajić, K., Marković, B., Pavlović, M. M., Sokić, M., Zildžović, S., Đorđević, N.,& Stojanović, K. A.. (2021). Deashing and desulfurization of subbituminous coal from the East field (Bogovina Basin, Serbia) - insights from chemical leaching. in Journal of the Serbian Chemical Society
Belgrade : Serbian Chemical Society., 86(11), 1113-1126.
https://doi.org/10.2298/JSC210719061P

Pantović-Spajić K, Marković B, Pavlović MM, Sokić M, Zildžović S, Đorđević N, Stojanović KA. Deashing and desulfurization of subbituminous coal from the East field (Bogovina Basin, Serbia) - insights from chemical leaching. in Journal of the Serbian Chemical Society. 2021;86(11):1113-1126.
doi:10.2298/JSC210719061P .

Pantović-Spajić, Katarina, Marković, Branislav, Pavlović, Miroslav M., Sokić, Miroslav, Zildžović, Snežana, Đorđević, Nataša, Stojanović, Ksenija A., "Deashing and desulfurization of subbituminous coal from the East field (Bogovina Basin, Serbia) - insights from chemical leaching" in Journal of the Serbian Chemical Society, 86, no. 11 (2021):1113-1126,
https://doi.org/10.2298/JSC210719061P . .

TY  - JOUR
AU  - Pantović Spajić, Katarina
AU  - Sakan, Sanja M.
AU  - Đorđević, Dragana S.
AU  - Šoštarić, Tatjana D.
AU  - Lopičić, Zorica
AU  - Janićijević, Aleksandra
AU  - Stojanović, Ksenija A.
PY  - 2019
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3854
AB  - The purpose of this paper was to investigate the effectiveness of three different extraction agents for the extraction of 25 elements from sediment samples collected from 4 artificial lakes and 12 rivers in Serbia (33 samples in total). The extraction efficiency of the agents was evaluated by its ability to extract the highest quantity of the elements. For that purpose, three acids (1M HCl, 2M HNO3 and 0.43M CH3COOH) have been used. Inductively coupled plasma atomic emission spectrometry (ICP-OES) was used for quantitative determination of following elements: Al, As, B, Ba, Be, Bi, Ca, Cd, Cr, Co, Cu, Fe, Hg, K, Li, Mg, Mn, Ni, Na, Pb, Sb, Se, Sr, V, and Zn. The extraction with 1M HCl has shown the best results for the majority of investigated elements (especially Sr, Mn and Ca). Antimony (Sb) was detected only after extraction with 0.43M CH3COOOH, while selenium (Se) could not be detected when 2M HNO3 was applied as extraction agents. The present study could be very useful for choosing a suitable method for specific elements and also can be helpful in the evaluation of the contaminants in freshwater sediments in Serbia. This might contribute to environmental risk assessment of the present elements.
T2  - Acta Periodica Technologica
T1  - Comparison of extraction agents for metal determination in sediments from artificial lakes and rivers in Serbia
VL  - 50
SP  - 189
EP  - 196
DO  - 10.2298/APT1950189P
ER  - 

@article{
author = "Pantović Spajić, Katarina and Sakan, Sanja M. and Đorđević, Dragana S. and Šoštarić, Tatjana D. and Lopičić, Zorica and Janićijević, Aleksandra and Stojanović, Ksenija A.",
year = "2019",
abstract = "The purpose of this paper was to investigate the effectiveness of three different extraction agents for the extraction of 25 elements from sediment samples collected from 4 artificial lakes and 12 rivers in Serbia (33 samples in total). The extraction efficiency of the agents was evaluated by its ability to extract the highest quantity of the elements. For that purpose, three acids (1M HCl, 2M HNO3 and 0.43M CH3COOH) have been used. Inductively coupled plasma atomic emission spectrometry (ICP-OES) was used for quantitative determination of following elements: Al, As, B, Ba, Be, Bi, Ca, Cd, Cr, Co, Cu, Fe, Hg, K, Li, Mg, Mn, Ni, Na, Pb, Sb, Se, Sr, V, and Zn. The extraction with 1M HCl has shown the best results for the majority of investigated elements (especially Sr, Mn and Ca). Antimony (Sb) was detected only after extraction with 0.43M CH3COOOH, while selenium (Se) could not be detected when 2M HNO3 was applied as extraction agents. The present study could be very useful for choosing a suitable method for specific elements and also can be helpful in the evaluation of the contaminants in freshwater sediments in Serbia. This might contribute to environmental risk assessment of the present elements.",
journal = "Acta Periodica Technologica",
title = "Comparison of extraction agents for metal determination in sediments from artificial lakes and rivers in Serbia",
volume = "50",
pages = "189-196",
doi = "10.2298/APT1950189P"
}

Pantović Spajić, K., Sakan, S. M., Đorđević, D. S., Šoštarić, T. D., Lopičić, Z., Janićijević, A.,& Stojanović, K. A.. (2019). Comparison of extraction agents for metal determination in sediments from artificial lakes and rivers in Serbia. in Acta Periodica Technologica, 50, 189-196.
https://doi.org/10.2298/APT1950189P

Pantović Spajić K, Sakan SM, Đorđević DS, Šoštarić TD, Lopičić Z, Janićijević A, Stojanović KA. Comparison of extraction agents for metal determination in sediments from artificial lakes and rivers in Serbia. in Acta Periodica Technologica. 2019;50:189-196.
doi:10.2298/APT1950189P .

Pantović Spajić, Katarina, Sakan, Sanja M., Đorđević, Dragana S., Šoštarić, Tatjana D., Lopičić, Zorica, Janićijević, Aleksandra, Stojanović, Ksenija A., "Comparison of extraction agents for metal determination in sediments from artificial lakes and rivers in Serbia" in Acta Periodica Technologica, 50 (2019):189-196,
https://doi.org/10.2298/APT1950189P . .