TY  - JOUR
AU  - Đokić, Jovana
AU  - Jovančićević, Branimir
AU  - Brčeski, Ilija
AU  - Ranitović, Milisav
AU  - Gajić, Nataša
AU  - Kamberović, Željko
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4522
AB  - Anode slime and tin precipitate as by-products of the electrorefining (ER) of non-standard anodes obtained after experimental smelting of waste electric and electronic equipment (e-waste), in addition to the base and precious metals, contains a significant amount of tin. Due to its presence as inert SnO(2)hydrate (beta metastannic acid) and its dissipation between slime and electrolyte, anode slime processing and metals valorization are difficult. This study aimed to investigate conditions under which efficient leaching of metastannic acid could be achieved to facilitate further metals valorization, especially precious metals. The investigation was performed using the by-products obtained from the ER of the non-standard Cu anodes produced by pyrometallurgical processing of e-waste. After detailed characterization of obtained products, the influence of various process parameters like temperature, acid concentration, leaching time, as well as the influence of reducing agent, sulfur compounds, and SnO(2)hydration rate on leaching efficiency was investigated. It was found that efficiency of 99% can be achieved by leaching the desulfurized tin precipitate sample in 6 M HCl at 90 degrees C for 90 min with the addition of Mg powder. The application of the tin removal process, described in this paper, contributes to efficient material flow management. [GRAPHICS] .
PB  - Springer, New York
T2  - Journal of Material Cycles and Waste Management
T1  - Leaching of metastannic acid from e-waste by-products
EP  - 1912
IS  - 6
SP  - 1899
VL  - 22
DO  - 10.1007/s10163-020-01076-5
ER  - 

@article{
author = "Đokić, Jovana and Jovančićević, Branimir and Brčeski, Ilija and Ranitović, Milisav and Gajić, Nataša and Kamberović, Željko",
year = "2020",
abstract = "Anode slime and tin precipitate as by-products of the electrorefining (ER) of non-standard anodes obtained after experimental smelting of waste electric and electronic equipment (e-waste), in addition to the base and precious metals, contains a significant amount of tin. Due to its presence as inert SnO(2)hydrate (beta metastannic acid) and its dissipation between slime and electrolyte, anode slime processing and metals valorization are difficult. This study aimed to investigate conditions under which efficient leaching of metastannic acid could be achieved to facilitate further metals valorization, especially precious metals. The investigation was performed using the by-products obtained from the ER of the non-standard Cu anodes produced by pyrometallurgical processing of e-waste. After detailed characterization of obtained products, the influence of various process parameters like temperature, acid concentration, leaching time, as well as the influence of reducing agent, sulfur compounds, and SnO(2)hydration rate on leaching efficiency was investigated. It was found that efficiency of 99% can be achieved by leaching the desulfurized tin precipitate sample in 6 M HCl at 90 degrees C for 90 min with the addition of Mg powder. The application of the tin removal process, described in this paper, contributes to efficient material flow management. [GRAPHICS] .",
publisher = "Springer, New York",
journal = "Journal of Material Cycles and Waste Management",
title = "Leaching of metastannic acid from e-waste by-products",
pages = "1912-1899",
number = "6",
volume = "22",
doi = "10.1007/s10163-020-01076-5"
}

Đokić, J., Jovančićević, B., Brčeski, I., Ranitović, M., Gajić, N.,& Kamberović, Ž.. (2020). Leaching of metastannic acid from e-waste by-products. in Journal of Material Cycles and Waste Management
Springer, New York., 22(6), 1899-1912.
https://doi.org/10.1007/s10163-020-01076-5

Đokić J, Jovančićević B, Brčeski I, Ranitović M, Gajić N, Kamberović Ž. Leaching of metastannic acid from e-waste by-products. in Journal of Material Cycles and Waste Management. 2020;22(6):1899-1912.
doi:10.1007/s10163-020-01076-5 .

Đokić, Jovana, Jovančićević, Branimir, Brčeski, Ilija, Ranitović, Milisav, Gajić, Nataša, Kamberović, Željko, "Leaching of metastannic acid from e-waste by-products" in Journal of Material Cycles and Waste Management, 22, no. 6 (2020):1899-1912,
https://doi.org/10.1007/s10163-020-01076-5 . .

TY  - JOUR
AU  - Milovanović, Ivan
AU  - Brčeski, Ilija
AU  - Stajić, Mirjana
AU  - Korac, Aleksandra
AU  - Vukojević, Jelena
AU  - Knežević, Aleksandar
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2829
AB  - The aim of this study was to evaluate the effect of high selenium (Se) concentrations on morphophysiological and ultrastructural properties of Pleurotus ostreatus. Mycelium growth was good in media enriched with 5.0, 10.0, and 20.0 mg L-1 of Se, concentration of 500.0 mg L-1 strongly inhibited growth, and 1000.0 mg L-1 was the minimum inhibitory concentration. Contrary to thin-walled, hyaline, branched, and anastomized hyphae with clamp-connections in the control, at Se concentrations of 100.0 and 500.0 mg L-1, they were noticeably short, frequently septed and branched, with a more intensive extracellular matrix, and without clamp-connections. At high Se concentrations, hyphae with intact membrane, without cellular contents, with a high level of vacuolization, and with numerous proteinaceous bodies were observed. Biomass yield ranged between 11.8 g L-1, in the control, and 6.8 g L-1, at an Se concentration of 100.0 mg L-1, while no production was detected at a concentration of 500.0 mg L-1. Se content in the mycelia reached a peak (938.9 mu g g(-1)) after cultivation in the medium enriched with Se at the concentration of 20.0 mg L-1, while the highest absorption level (53.25%) was found in the medium enriched with 5.0 mg L-1 Se.
PB  - Hindawi Publishing Corporation, New York
T2  - Scientific World Journal
T1  - Potential of Pleurotus ostreatus Mycelium for Selenium Absorption
DO  - 10.1155/2014/681834
ER  - 

@article{
author = "Milovanović, Ivan and Brčeski, Ilija and Stajić, Mirjana and Korac, Aleksandra and Vukojević, Jelena and Knežević, Aleksandar",
year = "2014",
abstract = "The aim of this study was to evaluate the effect of high selenium (Se) concentrations on morphophysiological and ultrastructural properties of Pleurotus ostreatus. Mycelium growth was good in media enriched with 5.0, 10.0, and 20.0 mg L-1 of Se, concentration of 500.0 mg L-1 strongly inhibited growth, and 1000.0 mg L-1 was the minimum inhibitory concentration. Contrary to thin-walled, hyaline, branched, and anastomized hyphae with clamp-connections in the control, at Se concentrations of 100.0 and 500.0 mg L-1, they were noticeably short, frequently septed and branched, with a more intensive extracellular matrix, and without clamp-connections. At high Se concentrations, hyphae with intact membrane, without cellular contents, with a high level of vacuolization, and with numerous proteinaceous bodies were observed. Biomass yield ranged between 11.8 g L-1, in the control, and 6.8 g L-1, at an Se concentration of 100.0 mg L-1, while no production was detected at a concentration of 500.0 mg L-1. Se content in the mycelia reached a peak (938.9 mu g g(-1)) after cultivation in the medium enriched with Se at the concentration of 20.0 mg L-1, while the highest absorption level (53.25%) was found in the medium enriched with 5.0 mg L-1 Se.",
publisher = "Hindawi Publishing Corporation, New York",
journal = "Scientific World Journal",
title = "Potential of Pleurotus ostreatus Mycelium for Selenium Absorption",
doi = "10.1155/2014/681834"
}

Milovanović, I., Brčeski, I., Stajić, M., Korac, A., Vukojević, J.,& Knežević, A.. (2014). Potential of Pleurotus ostreatus Mycelium for Selenium Absorption. in Scientific World Journal
Hindawi Publishing Corporation, New York..
https://doi.org/10.1155/2014/681834

Milovanović I, Brčeski I, Stajić M, Korac A, Vukojević J, Knežević A. Potential of Pleurotus ostreatus Mycelium for Selenium Absorption. in Scientific World Journal. 2014;.
doi:10.1155/2014/681834 .

Milovanović, Ivan, Brčeski, Ilija, Stajić, Mirjana, Korac, Aleksandra, Vukojević, Jelena, Knežević, Aleksandar, "Potential of Pleurotus ostreatus Mycelium for Selenium Absorption" in Scientific World Journal (2014),
https://doi.org/10.1155/2014/681834 . .

TY  - JOUR
AU  - Knežević, Aleksandar
AU  - Milovanović, Ivan
AU  - Stajić, Mirjana
AU  - Lončar, Nikola L.
AU  - Brčeski, Ilija
AU  - Vukojević, Jelena
AU  - Ćilerdžić, Jasmina
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2404
AB  - As biological decomposition of plant biomass represents a popular alternative environmental-friendly and economically justified process, screening of ligninolytic enzyme systems of various fungal species is a topical study area. The goal of the study was to obtain clear insight into the dynamics of laccase, Mn-dependent peroxidase, and Mn-independent peroxidase activity and levels of wheat straw lignin degradation in seven wood-rotting fungi. The best laccase producers were Pleurotus ostreatus and Pleurotus eryngii. Lenzites betulinus and Fomitopsis pinicola were the best Mn-dependent peroxidase producers, and P. ostreatus the weakest one. The peak of Mn-independent peroxidase was noted in Dichomytus squalens, and the minimum value in P. ostreatus. The profiles of the three enzymes, obtained by isoelectric focusing, were variable depending on the species and cultivation period. D. squalens was the best lignin degrader (34.1% of total lignin amount), and P. ostreatus and P. eryngii the weakest ones (7.1% and 14.5%, respectively).
PB  - Elsevier Sci Ltd, Oxford
T2  - Bioresource Technology
T1  - Lignin degradation by selected fungal species
EP  - 123
SP  - 117
VL  - 138
DO  - 10.1016/j.biortech.2013.03.182
ER  - 

@article{
author = "Knežević, Aleksandar and Milovanović, Ivan and Stajić, Mirjana and Lončar, Nikola L. and Brčeski, Ilija and Vukojević, Jelena and Ćilerdžić, Jasmina",
year = "2013",
abstract = "As biological decomposition of plant biomass represents a popular alternative environmental-friendly and economically justified process, screening of ligninolytic enzyme systems of various fungal species is a topical study area. The goal of the study was to obtain clear insight into the dynamics of laccase, Mn-dependent peroxidase, and Mn-independent peroxidase activity and levels of wheat straw lignin degradation in seven wood-rotting fungi. The best laccase producers were Pleurotus ostreatus and Pleurotus eryngii. Lenzites betulinus and Fomitopsis pinicola were the best Mn-dependent peroxidase producers, and P. ostreatus the weakest one. The peak of Mn-independent peroxidase was noted in Dichomytus squalens, and the minimum value in P. ostreatus. The profiles of the three enzymes, obtained by isoelectric focusing, were variable depending on the species and cultivation period. D. squalens was the best lignin degrader (34.1% of total lignin amount), and P. ostreatus and P. eryngii the weakest ones (7.1% and 14.5%, respectively).",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Bioresource Technology",
title = "Lignin degradation by selected fungal species",
pages = "123-117",
volume = "138",
doi = "10.1016/j.biortech.2013.03.182"
}

Knežević, A., Milovanović, I., Stajić, M., Lončar, N. L., Brčeski, I., Vukojević, J.,& Ćilerdžić, J.. (2013). Lignin degradation by selected fungal species. in Bioresource Technology
Elsevier Sci Ltd, Oxford., 138, 117-123.
https://doi.org/10.1016/j.biortech.2013.03.182

Knežević A, Milovanović I, Stajić M, Lončar NL, Brčeski I, Vukojević J, Ćilerdžić J. Lignin degradation by selected fungal species. in Bioresource Technology. 2013;138:117-123.
doi:10.1016/j.biortech.2013.03.182 .

Knežević, Aleksandar, Milovanović, Ivan, Stajić, Mirjana, Lončar, Nikola L., Brčeski, Ilija, Vukojević, Jelena, Ćilerdžić, Jasmina, "Lignin degradation by selected fungal species" in Bioresource Technology, 138 (2013):117-123,
https://doi.org/10.1016/j.biortech.2013.03.182 . .

TY  - JOUR
AU  - Milovanović, Ivan
AU  - Brčeski, Ilija
AU  - Stajić, Mirjana
AU  - Knežević, Aleksandar
AU  - Vukojević, Jelena
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2444
AB  - The purpose of this study was to resolve the question of whether various selenium concentrations affect the ability of eight species, members of five genera, to produce mycelium biomass and absorb this trace element during submerged cultivation in Na2SeO3-enriched medium. The obtained results demonstrated the ability of mycelia of all of the tested species to absorb selenium at analyzed concentrations. Thus, selenium content ranged from 1.4 mu g g(-1) (Pleurotus eryngii) to 20.3 mu g g(-1) (Pleurotus ostreatus). The potential of mycelia to absorb selenium was significant, ranging from 8.1% (Lenzites betulinus) to 62.5% (P ostreatus) of its content in the medium. It may be concluded that all tested mushroom species could be used as satisfactory selenium sources due to the fact that the absorbed concentrations ranged from 15.8% (P eryngii) to 36.9% (P. ostreatus) of the dietary selenium amount (55 mu g d(-1)) recommended by the European Scientific Committee on Food.
PB  - Begell House Inc, Danbury
T2  - International Journal of Medicinal Mushrooms
T1  - Potential Enrichment of Medicinal Mushrooms with Selenium to Obtain New Dietary Supplements
EP  - 455
IS  - 5
SP  - 449
VL  - 15
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2444
ER  - 

@article{
author = "Milovanović, Ivan and Brčeski, Ilija and Stajić, Mirjana and Knežević, Aleksandar and Vukojević, Jelena",
year = "2013",
abstract = "The purpose of this study was to resolve the question of whether various selenium concentrations affect the ability of eight species, members of five genera, to produce mycelium biomass and absorb this trace element during submerged cultivation in Na2SeO3-enriched medium. The obtained results demonstrated the ability of mycelia of all of the tested species to absorb selenium at analyzed concentrations. Thus, selenium content ranged from 1.4 mu g g(-1) (Pleurotus eryngii) to 20.3 mu g g(-1) (Pleurotus ostreatus). The potential of mycelia to absorb selenium was significant, ranging from 8.1% (Lenzites betulinus) to 62.5% (P ostreatus) of its content in the medium. It may be concluded that all tested mushroom species could be used as satisfactory selenium sources due to the fact that the absorbed concentrations ranged from 15.8% (P eryngii) to 36.9% (P. ostreatus) of the dietary selenium amount (55 mu g d(-1)) recommended by the European Scientific Committee on Food.",
publisher = "Begell House Inc, Danbury",
journal = "International Journal of Medicinal Mushrooms",
title = "Potential Enrichment of Medicinal Mushrooms with Selenium to Obtain New Dietary Supplements",
pages = "455-449",
number = "5",
volume = "15",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2444"
}

Milovanović, I., Brčeski, I., Stajić, M., Knežević, A.,& Vukojević, J.. (2013). Potential Enrichment of Medicinal Mushrooms with Selenium to Obtain New Dietary Supplements. in International Journal of Medicinal Mushrooms
Begell House Inc, Danbury., 15(5), 449-455.
https://hdl.handle.net/21.15107/rcub_technorep_2444

Milovanović I, Brčeski I, Stajić M, Knežević A, Vukojević J. Potential Enrichment of Medicinal Mushrooms with Selenium to Obtain New Dietary Supplements. in International Journal of Medicinal Mushrooms. 2013;15(5):449-455.
https://hdl.handle.net/21.15107/rcub_technorep_2444 .

Milovanović, Ivan, Brčeski, Ilija, Stajić, Mirjana, Knežević, Aleksandar, Vukojević, Jelena, "Potential Enrichment of Medicinal Mushrooms with Selenium to Obtain New Dietary Supplements" in International Journal of Medicinal Mushrooms, 15, no. 5 (2013):449-455,
https://hdl.handle.net/21.15107/rcub_technorep_2444 .