Abstract
The reduction of arsenic acid with aqueous sulfur dioxide in sulfuric acid solutions is presented. First order kinetics with respect to arsenic acid and sulfur dioxide concentrations are observed. Appreciable reduction occurs only when tetravalent sulfur is present as sulfur dioxide. The protonation of arsenic acid in strong sulfuric acid solutions decreases the rate of pentavalent arsenic reduction.
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Palmer, B.R., Nami, F. & Fuerstenau, M.C. Reduction of arsenic acid with aqueous sulfur dioxide. Metall Trans B 7, 385–390 (1976). https://doi.org/10.1007/BF02652709
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DOI: https://doi.org/10.1007/BF02652709