Oxidative dissolution of bornite by Acidithiobacillus ferrooxidans
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/01/2010
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Resumo |
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) 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. |
Formato |
101-106 |
Identificador |
http://dx.doi.org/10.1016/j.procbio.2009.08.013 Process Biochemistry. Oxford: Elsevier B.V., v. 45, n. 1, p. 101-106, 2010. 1359-5113 http://hdl.handle.net/11449/25301 10.1016/j.procbio.2009.08.013 WOS:000274071200015 |
Idioma(s) |
eng |
Publicador |
Elsevier B.V. |
Relação |
Process Biochemistry |
Direitos |
closedAccess |
Palavras-Chave | #Acidithiobacillus #Bornite #Leaching #Iron oxidation #Sulfur oxidation #Covellite |
Tipo |
info:eu-repo/semantics/article |