Jan 1, 1976

Microbiological oxidation of synthetic chalcocite and covellite by Thiobacillus ferrooxidans

Applied and Environmental Microbiology
H SakaguchiM Silver

Abstract

The microbiological oxidation of synthetic chalcocite and covellite has been investigated using an adapted strain of Thiobacillus ferrooxidans. Biodegradation of chalcocite was found to be 90 to 100% and that of covellite 45 to 60%. Optimum conditions for the oxidation of chalcocite were: pH, 1.7 to 2.3; temperature, 35 C; and ferric iron concentration in the range of 0.004 to 0.01 M. For covellite, the optimum conditions were: pH 2.3; temperature, 35 C; and ferric iron concentration in the range of 0.004 to 0.02 M. The energies of activation were determined to be 16.3 kcal (ca. 6.8 X 10(4) J) per mol and 11.7 kcal (ca. 4.8 X 10(4) J) per mol for chalcocite and covellite, respectively.

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Mentioned in this Paper

Oxidation
Copper
Bioremediation
Acidithiobacillus ferrooxidans
Oxidation-Reduction
Salts
Hydrogen-Ion Concentration
Thiobacillus thioparus
Mining
Water Microbiology

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