کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10149107 1646720 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sustainable electrochemical recovery of high-purity Cu powders from multi-metal acid solution by a centrifuge electrode
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Sustainable electrochemical recovery of high-purity Cu powders from multi-metal acid solution by a centrifuge electrode
چکیده انگلیسی
The green recovery of high value-added Cu products from electroplating sludge is an urgent challenge to the harmless disposal and sustainable utilization of hazardous waste. Hydrometallurgy based on leaching and electrodeposition is an environment-friendly process. A low-concentration and multi-metal solution is usually obtained after leaching. Generally, crude Cu products are only produced by electrodeposition. In this paper, a centrifuge electrode is proposed for the simple and green recovery of high-purity Cu powders by one-step electrodeposition from leaching solution of electroplating sludge. The current density of Cu electrodeposition can be enhanced based on the results of cyclic voltammetry. It is confirmed that the purity, recovery ratio and current efficiency of Cu products are obviously increased by the centrifuge electrode due to the enhanced mass transfer. The electrodeposition of metal impurities is effectively inhibited. The structure of Cu products is adjusted from foils to powders by the combination of Cu concentration and rotating speed. Particularly, high-purity Cu powders are electrodeposited on the centrifuge electrode from Cu-Ni mixed solution with 2 g L−1 Cu2+ and 2 g L−1 Ni2+. In addition, the purity, recovery ratio, current efficiency and particle size of Cu powders depend on H2SO4 concentration and current density. Cu powders with a purity of 99.9% are selectively separated from the multi-metal leaching solution of electroplating sludge.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Cleaner Production - Volume 204, 10 December 2018, Pages 41-49
نویسندگان
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