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Experimental study of metastable sulfur oxyanion formation during pyrite oxidation at pH 6-9 and 30oC.

American Journal of Science

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Abstract

Metastable sulphur oxyanions accumulate as intermediates in the pathway of pyrite oxidation over the pH range 6-9. The rate of oxidation is chemically controlled and is not limited to adsorption. The oxidation mechanism incorporates initial adsorption of oxygen to the pyrite surface followed by a rate-determining step that is reaction-controlled. The postulated sequence of S reactions is that thiosulphate is a precursor to tetrathionate and that sulphite is the precursor to sulphate. Experimental results indicate that production of metastable S oxyanions during nonbiogenic oxidation of iron disulphide minerals is possible. -M.S.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Experimental study of metastable sulfur oxyanion formation during pyrite oxidation at pH 6-9 and 30oC.
Series title:
American Journal of Science
Volume
283
Issue:
3
Year Published:
1983
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
193
Last page:
217
Number of Pages:
25