PMID: 45294Jan 1, 1979

Pyrite oxidation by Thiobacillus ferrooxidans with special reference to the sulphur moiety of the mineral

Antonie van Leeuwenhoek
G J Arkesteyn

Abstract

Available cultures of Thiobacillus ferrooxidans were found to be contaminated with bacteria very similar to Thiobacillus acidophilus. The experiments described were performed with a homogeneous culture of Thiobacillus ferrooxidans. Pyrite (FeS2) was oxidized by Thiobacillus ferrooxidans grown on iron (Fe2+), elemental sulphur (S0) or FeS2. Evidence for the direct utilization of the sulphur moiety of pyrite by Thiobacillus ferrooxidans was derived from the following observations: a. Known inhibitors of Fe2+ and S0 oxidation, NaN3 and NEM, respectively, partially abolished FeS2 oxidation. b. A b-type cytochrome was detectable in FeS2- and S0-grown cells but not in Fe2+-grown cells. c. FeS2 and S0 reduced b-type cytochromes in whole cells grown on S0. d. CO2 fixation at pH 4.0 per mole of oxygen consumed was the highest with S0, lowest with Fe2+ and medium with FeS2 as substrate. e. Bacterial Fe2+ oxidation was found to be negligible at pH 5.0 whereas both FeS2 and S0 oxidation was still appreciable above this pH. f. Separation of pyrite and bacteria by means of a dialysis bag caused a pronounced drop of the oxidation rate which was similar to the reduction of pyrite oxidation by NEM; indirect oxidation of the sulphur moiety by Fe...Continue Reading

References

Jul 1, 1986·The Veterinary Quarterly·F JongejanG Uilenberg
Sep 5, 1988·Biotechnology and Bioengineering·G AndrewsT Hansson

Citations

Mar 1, 1975·Canadian Journal of Microbiology·R Guay, M Silver
Mar 1, 1978·Mikrobiologiia·L A GromovaG I Karavaĭko
Jan 1, 1970·Archiv für Mikrobiologie·T Peeters, M I Aleem
Dec 1, 1974·Canadian Journal of Microbiology·C Bodo, D G Lundgren
Dec 1, 1966·Journal of Bacteriology·P MargalithD G Lundgren
Apr 1, 1967·Canadian Journal of Microbiology·D W DuncanC C Walden
Oct 1, 1967·Journal of Bacteriology·M P Silverman
Nov 1, 1956·Journal of Bacteriology·S A BRALEYW W LEATHEN

Related Concepts

Ethylmaleimide
Energy Metabolism
Sulfur
Cytochromes
Thioethers
Carbon Dioxide
Ferrous Compounds
Hydrogen-Ion Concentration
Thiobacillus thioparus
Fe-S2 marcosite of pyrite

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