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SO2/O2 as an oxidant in hydrometallurgy

Zhang, W., Singh, P. and Muir, D.M. (2000) SO2/O2 as an oxidant in hydrometallurgy. Minerals Engineering, 13 (13). pp. 1319-1328.

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Oxygen mixed with SO2 can function as a powerful oxidant in acid solution. This paper summarises basic studies on the mechanism of SO2/O2 oxidation, the kinetics of oxidation in acidic media, and potential applications in hydrometallurgy. The SO2/O2 system readily oxidises Fe(II) to Fe(III) and provides a simple method of regenerating Fe(III) for leaching minerals like Cu2S or U3O8. It also oxidises As(III), which in the presence of iron(III) enables a stable ferric arsenate compound to be precipitated. A method for the leaching and removal of arsenic from smelter fumes is proposed. Oxidation of Mn(II) to Mn(III)/Mn(IV) oxides by SO2/O2 allows manganese impurity to be removed from leach liquors and electrolytes.

Item Type: Journal Article
Murdoch Affiliation: School of Chemical and Mathematical Science
Journal or Publication Title: Minerals Engineering
Page Range: pp. 1319-1328
Publisher: Elsevier BV
Copyright: © 2000 Published by Elsevier Ltd.
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