Leaching of metastannic acid from e-waste by-products
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2020
Authors
Đokić, Jovana
Jovančićević, Branimir

Brčeski, Ilija

Ranitović, Milisav

Gajić, Nataša
Kamberović, Željko
Article (Published version)

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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 SnO2 hydrate (β 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 SnO2 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 °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.
Source:
Journal of Material Cycles and Waste Management, 2020, 22, 6, 1899-1912Publisher:
- Springer
Funding / projects:
- Presented research was fnancially supported by the Ministry of Education, Science and Technological Development, Republic of Serbia.
DOI: 10.1007/s10163-020-01076-5
ISSN: 1438-4957
WoS: 000546526600001
Scopus: 2-s2.0-85087719836
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Hemijski fakultet / Faculty of ChemistryTY - JOUR AU - Đokić, Jovana AU - Jovančićević, Branimir AU - Brčeski, Ilija AU - Ranitović, Milisav AU - Gajić, Nataša AU - Kamberović, Željko PY - 2020 UR - https://cherry.chem.bg.ac.rs/handle/123456789/4276 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 SnO2 hydrate (β 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 SnO2 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 °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. PB - Springer T2 - Journal of Material Cycles and Waste Management T1 - Leaching of metastannic acid from e-waste by-products VL - 22 IS - 6 SP - 1899 EP - 1912 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 SnO2 hydrate (β 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 SnO2 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 °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.", publisher = "Springer", journal = "Journal of Material Cycles and Waste Management", title = "Leaching of metastannic acid from e-waste by-products", volume = "22", number = "6", pages = "1899-1912", 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., 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 . .