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Oxidative dissolution of bornite by Acidithiobacillus ferrooxidans

Paper ID Volume ID Publish Year Pages File Format Full-Text
35216 45081 2010 6 PDF Available
Title
Oxidative dissolution of bornite by Acidithiobacillus ferrooxidans
Abstract

The oxidation of finely ground (−200 μm) bornite (Cu5FeS4) by Acidithiobacillus ferrooxidans was evaluated in oxygen uptake and shake flasks experiments. The oxidation was a net acid-consuming reaction. Residual bornite was not detected by X-fray diffraction in solids after 2 days of contact in acid leach solution, indicating that the chemical and biological oxidation of bornite was relatively fast. Virtually 100% of copper solubilization was achieved in A. ferrooxidans cultures with or without ferrous iron, while in abiotic controls the copper extraction was around 30%. Bornite was not oxidized by Acidithiobacillus thiooxidans in respirometric or shake flasks experiments. Covellite (CuS) was detected as a secondary phase under all experimental conditions. Sulfur and jarosite were formed only in the presence of A. ferrooxidans.

Keywords
Acidithiobacillus; Bornite; Leaching; Iron oxidation; Sulfur oxidation; Covellite
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Oxidative dissolution of bornite by Acidithiobacillus ferrooxidans
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 45, Issue 1, January 2010, Pages 101–106
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
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