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.
Ključne reči:
e-waste / electrolyte recycling / solvent extraction / chelating extractants / copper / impurities influence / metal distributionIzvor:
Metals, 2021, 11, 9Finansiranje / projekti:
- Ministarstvo nauke, tehnološkog razvoja i inovacija Republike Srbije, institucionalno finansiranje - 200288 (Inovacioni centar Hemijskog fakulteta u Beogradu doo) (RS-MESTD-inst-2020-200288)
DOI: 10.3390/met11091383
ISSN: 2075-4701
WoS: 000701399800001
Scopus: 2-s2.0-85114104220
Kolekcije
Institucija/grupa
Inovacioni centarTY - JOUR AU - Djokic, Jovana AU - Radovanović, Dragana AU - Nikolovski, Zlatko AU - Andjic, Zoran AU - Kamberović, Željko PY - 2021 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4795 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 IS - 9 VL - 11 DO - 10.3390/met11091383 ER -
@article{ author = "Djokic, Jovana and Radovanović, Dragana and Nikolovski, Zlatko and Andjic, 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", number = "9", volume = "11", doi = "10.3390/met11091383" }
Djokic, J., Radovanović, D., Nikolovski, Z., Andjic, Z.,& Kamberović, Ž.. (2021). Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery. in Metals, 11(9). https://doi.org/10.3390/met11091383
Djokic J, Radovanović D, Nikolovski Z, Andjic Z, Kamberović Ž. Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery. in Metals. 2021;11(9). doi:10.3390/met11091383 .
Djokic, Jovana, Radovanović, Dragana, Nikolovski, Zlatko, Andjic, Zoran, Kamberović, Željko, "Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery" in Metals, 11, no. 9 (2021), https://doi.org/10.3390/met11091383 . .