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Bioleaching of Enargite by Arsenic-Tolerant Acidithiobacillus Ferrooxidans
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Bioleaching of Enargite by Arsenic-Tolerant Acidithiobacillus Ferrooxidans

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Abstract:

Acidithiobacillus ferrooxidans was acclimatized to 1000 mg/L arsenic(V) and then used for the bioleaching of enargite (Cu3AsS4) at pH 2. Secondary minerals formed during the bioleaching of enargite were characterized by X-ray diffraction, FT- infrared spectroscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. Oxidative dissolution of enargite resulted in the formation of elemental sulfur, arsenate and oxidized sulfur species including jarosites and possibly also schwertmannite at pH 2.

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Info:

Periodical:

Advanced Materials Research (Volumes 71-73)

Pages:

485-488

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.71-73.485

Citation:

Cite this paper

Online since:

May 2009

Authors:

Keiko Sasaki, Koichiro Takatsugi, Tsuyoshi Hirajima, Naofumi Kozai, Toshihiko Ohnuki, Olli H. Tuovinen

Keywords:

Acidithiobacillus ferrooxidans, Arsenic, Bioleaching, Enargite, X-Ray Photoelectron Spectroscopy (XPS)

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