Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery
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In order to reflect possible issues in future sole e-waste processing, an electrolyte of complex chemical composition reflecting system of sole e-waste processing was obtained by following a specially designed pyro-electrometallurgical method. The obtained non-standard electrolyte was further used for the purpose of comprehensive metal interference evaluation on the copper solvent extraction (SX) process. Optimization of the process included a variation of several process parameters, allowing determination of the effect of the most abundant and potentially the most influential impurities (Ni, Sn, Fe, and Zn) and 14 other trace elements. Moreover, comparing three commercial extractants of different active chelating groups, it was determined that branched aldoxime reagent is favorable for Cu extraction from the chemically complex system, as can be expected in future e-waste recycling. The results of this study showed that, under optimal conditions of 20 vol.% extractant concentration, fe...ed pH 1.5, O/A ratio 3, and 10-min phase contact time, 88.1% of one stage Cu extraction was achieved. Co-extraction of the Fe, Zn, Ni, and Sn was under 8%, while Pb and trace elements were negligible. Optimal conditions (H2SO4 180 g/L, O/A = 2, and contact time 5 min) enabled 95.3% Cu stripping and under 6% of the most influential impurities. In addition, an impurity monitoring and distribution methodology enabled a better understanding and design of the process for the more efficient valorization of metals from e-waste.
Keywords:
chelating extractants / copper / e-waste / electrolyte recycling / impurities influence / metal distribution / solvent extractionSource:
Metals, 2021, 11, 9, 1383-Funding / projects:
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200288 (Innovation Center of the Faculty of Chemistry) (RS-MESTD-inst-2020-200288)
DOI: 10.3390/met11091383
ISSN: 2075-4701
WoS: 000701399800001
Scopus: 2-s2.0-85114104220
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Inovacioni centar / Innovation CentreTY - JOUR AU - Đokić, Jovana AU - Radovanović, Dragana AU - Nikolovski, Zlatko AU - Anđić, Zoran AU - Kamberović, Željko PY - 2021 UR - https://www.mdpi.com/2075-4701/11/9/1383 UR - https://cherry.chem.bg.ac.rs/handle/123456789/4666 AB - In order to reflect possible issues in future sole e-waste processing, an electrolyte of complex chemical composition reflecting system of sole e-waste processing was obtained by following a specially designed pyro-electrometallurgical method. The obtained non-standard electrolyte was further used for the purpose of comprehensive metal interference evaluation on the copper solvent extraction (SX) process. Optimization of the process included a variation of several process parameters, allowing determination of the effect of the most abundant and potentially the most influential impurities (Ni, Sn, Fe, and Zn) and 14 other trace elements. Moreover, comparing three commercial extractants of different active chelating groups, it was determined that branched aldoxime reagent is favorable for Cu extraction from the chemically complex system, as can be expected in future e-waste recycling. The results of this study showed that, under optimal conditions of 20 vol.% extractant concentration, feed pH 1.5, O/A ratio 3, and 10-min phase contact time, 88.1% of one stage Cu extraction was achieved. Co-extraction of the Fe, Zn, Ni, and Sn was under 8%, while Pb and trace elements were negligible. Optimal conditions (H2SO4 180 g/L, O/A = 2, and contact time 5 min) enabled 95.3% Cu stripping and under 6% of the most influential impurities. In addition, an impurity monitoring and distribution methodology enabled a better understanding and design of the process for the more efficient valorization of metals from e-waste. T2 - Metals T1 - Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery VL - 11 IS - 9 SP - 1383 DO - 10.3390/met11091383 ER -
@article{ author = "Đokić, Jovana and Radovanović, Dragana and Nikolovski, Zlatko and Anđić, Zoran and Kamberović, Željko", year = "2021", abstract = "In order to reflect possible issues in future sole e-waste processing, an electrolyte of complex chemical composition reflecting system of sole e-waste processing was obtained by following a specially designed pyro-electrometallurgical method. The obtained non-standard electrolyte was further used for the purpose of comprehensive metal interference evaluation on the copper solvent extraction (SX) process. Optimization of the process included a variation of several process parameters, allowing determination of the effect of the most abundant and potentially the most influential impurities (Ni, Sn, Fe, and Zn) and 14 other trace elements. Moreover, comparing three commercial extractants of different active chelating groups, it was determined that branched aldoxime reagent is favorable for Cu extraction from the chemically complex system, as can be expected in future e-waste recycling. The results of this study showed that, under optimal conditions of 20 vol.% extractant concentration, feed pH 1.5, O/A ratio 3, and 10-min phase contact time, 88.1% of one stage Cu extraction was achieved. Co-extraction of the Fe, Zn, Ni, and Sn was under 8%, while Pb and trace elements were negligible. Optimal conditions (H2SO4 180 g/L, O/A = 2, and contact time 5 min) enabled 95.3% Cu stripping and under 6% of the most influential impurities. In addition, an impurity monitoring and distribution methodology enabled a better understanding and design of the process for the more efficient valorization of metals from e-waste.", journal = "Metals", title = "Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery", volume = "11", number = "9", pages = "1383", doi = "10.3390/met11091383" }
Đokić, J., Radovanović, D., Nikolovski, Z., Anđić, Z.,& Kamberović, Ž.. (2021). Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery. in Metals, 11(9), 1383. https://doi.org/10.3390/met11091383
Đokić J, Radovanović D, Nikolovski Z, Anđić Z, Kamberović Ž. Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery. in Metals. 2021;11(9):1383. doi:10.3390/met11091383 .
Đokić, Jovana, Radovanović, Dragana, Nikolovski, Zlatko, Anđić, Zoran, Kamberović, Željko, "Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery" in Metals, 11, no. 9 (2021):1383, https://doi.org/10.3390/met11091383 . .