Application of a Three-Dimensional Electrode to the Electrochemical Removal of Copper and Zinc Ions from Diluted Solutions
Electrochemical removal of copper and zinc ions from synthetic solutions simulating drainage water flowing from abandoned mines was studied. A three-dimensional cathode was suitable for this purpose. Use of graphite felt electrodes in deoxygenated solution reduced the copper concentration in the solution from 150 to less than 0.05 mg/cubic decimeter (dm3) with a current efficiency of 68%. For successful zinc removal, it was necessary to increase the pH of the solution to values ≥10 to suppress the parasitic hydrogen evolution reaction. At these conditions, the zinc concentration in the solution could be reduced from 200 to 1.1 mg/dm3 with a current efficiency of 65%. Using a stainless steel wool cathode under identical conditions, a comparable current efficiency was achieved, but the outlet concentration of heavy metal ions increased to 22.1 mg/dm3.
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Document Type: Research Article
Publication date: 2000-09-01
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Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year. Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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