Bioleaching of Enargite by Arsenic-Tolerant Acidithiobacillus Ferrooxidans
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.
Edgardo R. Donati, Marisa R. Viera, Eduardo L. Tavani, María A. Giaveno, Teresa L. Lavalle, Patricia A. Chiacchiarini
K. Sasaki et al., "Bioleaching of Enargite by Arsenic-Tolerant Acidithiobacillus Ferrooxidans", Advanced Materials Research, Vols. 71-73, pp. 485-488, 2009