Reduction of arsenic acid with aqueous sulfur dioxide |
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| Authors: | B R Palmer F Nami M C Fuerstenau |
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| Affiliation: | (1) Department of Metallurgical Engineering, South Dakota School of Mines and Technology, Rapid City, SD |
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| 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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