Oxidation of isochemical FeS2 (marcasite–pyrite) by Acidithiobacillus thiooxidans and Acidithiobacillus ferrooxidans

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 2007 Brazil English Publisher:Elsevier BVJournal:Minerals Engineering, volume 20, pages 98-101 (issn: 0892-6875,

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Authors: Garcia, Oswaldo; Bigham, Jerry M.; Tuovinen, I. H.;

doi: 10.1016/j.mineng.2006.05.005

handle: 11449/36239

Oxidation of isochemical FeS2 (marcasite–pyrite) by Acidithiobacillus thiooxidans and Acidithiobacillus ferrooxidans

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Abstract

Abstract A research-grade mineral sample that contained marcasite and pyrite (FeS 2 ) was subjected to the oxidation by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans . Oxidation of FeS 2 by A. ferrooxidans produced acid, and the redox potential increased with sulfide dissolution and the oxidation of Fe 2+ . Jarosite was detected in solids from spent cultures. Preferential oxidation of either mineral was not consistently observed across all treatments. Neither iron sulfide was oxidized by A. thiooxidans .

Country

Brazil

Related Organizations

Universidade Estadual Paulista - UNESP
Brazil
The Ohio State University
United States
Sao Paulo State University
Brazil

Keywords

marcasite, Acidithiobacillus, bioleaching, pyrite

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