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Removal of copper in leachate from mining residues using electrochemical technology

Lambert, Andréa ; Drogui, Patrick ; Daghrir, Rimeh ; Zaviska, François ; Benzaazoua, Mostafa

Journal of Environmental Management, 15 January 2014, Vol.133, pp.78-85 [Tạp chí có phản biện]

ISSN: 0301-4797 ; E-ISSN: 1095-8630 ; DOI: 10.1016/j.jenvman.2013.11.036

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  • Nhan đề:
    Removal of copper in leachate from mining residues using electrochemical technology
  • Tác giả: Lambert, Andréa ; Drogui, Patrick ; Daghrir, Rimeh ; Zaviska, François ; Benzaazoua, Mostafa
  • Chủ đề: Electrochemical Deposition Process ; Mining Residues Leachate ; Copper ; Response Surface Methodology ; Environmental Sciences ; Economics
  • Là 1 phần của: Journal of Environmental Management, 15 January 2014, Vol.133, pp.78-85
  • Mô tả: This research is related to a laboratory study on the performance of a successive mining residues leaching and electrochemical copper recovery process. To clearly define the experimental region for response surface methodology (RSM), a preliminary study was performed by applying a current intensity varying from 0.5 A to 4.0 A for 60 min. By decreasing the current intensity from 4.0 A to 0.5 A, a good adhesion and a very smooth and continuous interface of copper was formed and deposited on the cathode electrode. However, the removal rate of Cu decreased from 83.7% to 37.9% when the current intensity passed from 4.0 A to 0.5 A, respectively. Subsequently, the factorial design and central composite design methodologies were successively employed to define the optimal operating conditions for copper removal in the mining residues leachate. Using a 2 factorial matrix, the best performance for copper removal (97.7%) was obtained at a current intensity of 2.0 A during 100 min. The current intensity and electrolysis time were found to be the most influent parameters. The contribution of current intensity and electrolysis time was around 65.8% and 33.9%, respectively. The treatment using copper electrode and current intensity of 1.3 A during 80 min was found to be the optimal conditions in terms of cost/effectiveness. Under these conditions, 86% of copper can be recovered for a total cost of 0.56 $ per cubic meter of treated mining residues leachate.
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0301-4797 ; E-ISSN: 1095-8630 ; DOI: 10.1016/j.jenvman.2013.11.036

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