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- W3132737923 endingPage "125469" @default.
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- W3132737923 abstract "The recovery of heavy metals is a vital way to turn electroplating sludge into resources and reduce its environmental hazards. However, the complex compositions of the polymetallic electroplating sludge severely limit the selective recovery of metal resources such as copper. In this study, we took a kind of copper-containing electroplating sludge (C-ES) as an example present and investigated the process of copper extraction. The copper and other metals were directional converted through an accurate phase transformation process carried out by chlorination combined with thermal regulation. Eventually, the copper was selectively recovered in the form of CuCl2·2H2O, while the rest of the metals were converted into stable metal salts or oxides. The HCl solution was the best regulator for selective copper recovery. Under the optimal conditions, the recovery of copper approached 97% and the purity of the CuCl2·2H2O product was about 95%. The kinetic reaction equation of the CuCl2 volatilization process can be described by Power Low, G(α) = α1/15. The economic estimate based on experimentation indicates the profit of recycling CuCl2·2H2O is about $23.2/kg. This work provides a novel, simple, and efficient approach to the selective recovery of heavy metal from polymetallic solid wastes." @default.
- W3132737923 created "2021-03-01" @default.
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- W3132737923 date "2021-07-01" @default.
- W3132737923 modified "2023-10-13" @default.
- W3132737923 title "One-step extraction of high-purity CuCl2·2H2O from copper-containing electroplating sludge based on the directional phase conversion" @default.
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- W3132737923 doi "https://doi.org/10.1016/j.jhazmat.2021.125469" @default.
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