Schippers, Axel; Sand, Wolfgang:
Bacterial leaching of metal sulfides proceeds by two indirect mechanisms via thiosulfate or via polysulfides and sulfur.
1999
In: Applied and Environmental Microbiology (Appl.Environ.Microbiol.), Jg. 65 (1999), Heft 1, S. 319 - 321
Artikel/Aufsatz in Zeitschrift1999Chemie
Titel:
Bacterial leaching of metal sulfides proceeds by two indirect mechanisms via thiosulfate or via polysulfides and sulfur.
Autor(in):
Schippers, Axel; Sand, WolfgangLSF
Erscheinungsjahr
1999
Erschienen in:
Titel:
Applied and Environmental Microbiology (Appl.Environ.Microbiol.)
in:
Jg. 65 (1999), Heft 1, S. 319 - 321
ISSN:

Abstract:

The acid-insol. metal sulfides FeS2, MoS2, and WS2 are chem. attacked by iron(III) hexahydrate ions, generating thiosulfate, which is oxidized to sulfuric acid. Other metal sulfides are attacked by iron(III) ions and by protons, resulting in the formation of elemental sulfur via intermediary polysulfides. Sulfur is biooxidized to sulfuric acid. This explains leaching of metal sulfides by Thiobacillus thiooxidans.