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Article

Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery

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Innovation Centre of Faculty of Chemistry in Belgrade Ltd., University of Belgrade, Studentski Trg 12-16, 11000 Belgrade, Serbia
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Innovation Centre of Faculty of Technology and Metallurgy in Belgrade Ltd., University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
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Institute Mol, Nikole Tesle 15, 22300 Stara Pazova, Serbia
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Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
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Author to whom correspondence should be addressed.
Academic Editor: Alexandre Chagnes
Metals 2021, 11(9), 1383; https://doi.org/10.3390/met11091383
Received: 30 July 2021 / Revised: 23 August 2021 / Accepted: 25 August 2021 / Published: 31 August 2021
(This article belongs to the Special Issue Advanced Sorbents for Separation of Metal Ions)
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. View Full-Text
Keywords: e-waste; electrolyte recycling; solvent extraction; chelating extractants; copper; impurities influence; metal distribution e-waste; electrolyte recycling; solvent extraction; chelating extractants; copper; impurities influence; metal distribution
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MDPI and ACS Style

Djokić, J.; Radovanović, D.; Nikolovski, Z.; Andjić, Z.; Kamberović, Ž. Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery. Metals 2021, 11, 1383. https://doi.org/10.3390/met11091383

AMA Style

Djokić J, Radovanović D, Nikolovski Z, Andjić Z, Kamberović Ž. Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery. Metals. 2021; 11(9):1383. https://doi.org/10.3390/met11091383

Chicago/Turabian Style

Djokić, Jovana, Dragana Radovanović, Zlatko Nikolovski, Zoran Andjić, and Željko Kamberović. 2021. "Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery" Metals 11, no. 9: 1383. https://doi.org/10.3390/met11091383

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