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Treatment of an effluent containing anionic species to be oxidized, in particular an effluent cyanide, by chemical oxidation and electrolysis.
Treatment of an effluent containing anionic species to be oxidized, in particular an effluent cyanide, by chemical oxidation and electrolysis.
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机译:通过化学氧化和电解处理包含要被氧化的阴离子物质的流出物,特别是流出的氰化物。
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摘要
A method for destroying metal cyanide complexes in a cyanide-containing effluent having a variable composition, wherein the free anions are chemically oxidised (20) and the metals are reduced at the cathode by electrodeposition (60). The chemical oxidation and electrolysis steps can be carried out simultaneously or one after the other. A three-compartment membrane electrolysis device (62) comprising an anode, two cation exchange membranes and a cathode is also disclosed. The cation exchange membranes used are commercially available membranes having good strength properties and good selectivity in alkaline media. Moreover, they are mechanically supported by frames on a polymeric support, e.g. a polyvinyl chloride (PVC) support.
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