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Oxidation mechanisms and kinetics of pyrite and pyrrhotite in alkaline solutions
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DOI：10.1016/j.cemconres.2026.108339.png)
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Abstract
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• Pyrite and pyrrhotite oxidation rates differed by a factor of 2 on a mass basis. • Alkaline oxidation rates for pyrite and pyrrhotite increase only slightly with pH. • Thiosulfate dominated in pyrrhotite oxidation, and sulfite and thiosulfate in pyrite. • Oxidized pyrrhotite retained an Fe(III)-rich outer surface and deeper sulfur layer.
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