Oxidative dissolution of bornite by Acidithiobacillus ferrooxidans
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Data
2010-01-01
Autores
Bevilaqua, D. [UNESP]
Garcia, O. [UNESP]
Tuovinen, O. H.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
The oxidation of finely ground (-200 mu m) bornite (Cu(5)FeS(4)) 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. (C) 2009 Elsevier Ltd. All rights reserved.
Descrição
Palavras-chave
Acidithiobacillus, Bornite, Leaching, Iron oxidation, Sulfur oxidation, Covellite
Como citar
Process Biochemistry. Oxford: Elsevier B.V., v. 45, n. 1, p. 101-106, 2010.