METHOD FOR TREATING THIOARSENITE

摘要

PROBLEM TO BE SOLVED: To provide a method for treating thioarsenite capable of effectively separating and removing thioarsenite from a leachate obtained by leaching copper concentrate of non-ferrous metal smelting with alkali etc. as solid crystalline thioarsenate.

SOLUTION: The method at least includes an oxidation process in which the thioarsenite is oxidized to the thioarsenate by adding sulfur to the alkaline solution containing the thioarsenite. Moreover, the method preferably includes a depositing process in which the thioarsenate is deposited by cooling the alkaline solution containing the thioarsenate, and also preferably includes a solid-liquid separation process in which the alkaline solution wherein the thioarsenate has been deposited is subjected to solid-liquid separation.

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