Affiliation:
1. Department of Microbiology and Department of Agronomy, 2 Ohio State University, Columbus, Ohio 43210
Abstract
The biological leaching of pyrrhotite (Fe
1-
x
S) by
Thiobacillus ferrooxidans
was studied to characterize the oxidation process and to identify the mineral weathering products. The process was biphasic in that an initial phase of acid consumption and decrease in redox potential was followed by an acid-producing phase and an increase in redox potential. Elemental S was one of the first products of pyrrhotite degradation detected by X-ray diffraction. Pyrrhotite oxidation also yielded K-jarosite [KFe
3
(SO
4
)
2
(OH)
6
], goethite (α-FeOOH), and schwertmannite [Fe
8
O
8
(OH)
6
SO
4
] as solid-phase products. Pyrrhotite was mostly depleted after 14 days, whereas impurities in the form of pyrite (cubic FeS
2
) and marcasite (orthorhombic FeS
2
) accumulated in the leach residue.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
Reference19 articles.
1. Ahonen L. P. Hiltunen and 0. H. Tuovinen. 1986. The role of pyrrhotite and pyrite in the bacterial leaching of chalcopyrite p. 13-22. In R. W. Lawrence R. M. R. Branion and H. G. Ebner (ed.) Fundamental and applied biohydrometallurgy. Elsevier Amsterdam.
2. Bacterial oxidation of sulfide minerals in column leaching experiments at suboptimal temperatures;Ahonen L.;Appl. Environ. Microbiol.,1992
3. Bigham J. M. U. Schwertmann and L. Carlson. 1992. Mineralogy of precipitates formed by the biogeochemical oxidation of Fe(II) in mine drainage p. 219-232. In H. C. W. Skinner and R. W. Fitzpatrick (ed.) Biomineralization processes of iron and manganese. Catena Verlag Cremlingen Germany.
4. A poorly crystallized oxyhydroxysulfate of iron formed by bacterial oxidation of Fe(II) in acid mine waters;Bigham J. M.;Geochim. Cosmochim. Acta,1990
5. Influence of sulfate on Fe-oxide formation: comparisons with a stream receiving acid mine drainage;Brady K. S.;Clays Clay Miner.,1986
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