Oxidative dissolution of chalcopyrite by Acidithiobacillus ferrooxidans analyzed by electrochemical impedance spectroscopy and atomic force microscopy

Bioelectrochemistry
D BevilaquaO Garcia

Abstract

The microbiological leaching of chalcopyrite (CuFeS(2)) is of great interest because of its potential application to many CuFeS(2)-rich ore materials. However, the efficiency of the microbiological process is very limited because this mineral is one of the most refractory to bacterial attack. Knowledge of bacterial role during chalcopyrite oxidation is very important in order to improve the efficiency of bioleaching operation. The oxidative dissolution of a massive chalcopyrite electrode by Acidithiobacillus ferrooxidans was evaluated by electrochemical impedance spectroscopy (EIS) and atomic force microscopy (AFM). A massive chalcopyrite electrode was utilized in a Tait-type electrochemical cell in acid medium for different immersion times in the presence or absence of bacterium. The differences observed in the impedance diagrams were correlated with the adhesion process of bacteria on the mineral surface.

References

Mar 30, 2000·Journal of Microbiological Methods·H H FangL C Xu

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Citations

May 16, 2012·Applied Microbiology and Biotechnology·René H LaraRoel Cruz
Mar 28, 2013·Journal of Contaminant Hydrology·Edmundo Placencia-GómezAndrew Binley
Jun 11, 2014·Talanta·Yusheng NiuErkang Wang
Sep 24, 2014·Advances in Colloid and Interface Science·Mengxue DiaoAnh V Nguyen

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