Control of the Redox Potential by Oxygen Limitation Inhibits Bioleaching of Pyrite

Biao Wu; Jian Kang Wen; Gui Ying Zhou; Ren Man Ruan

doi:10.4028/www.scientific.net/AMR.71-73.401

Paper Titles

Oxidation of Chalcopyrite (CuFeS₂) by Acidithiobacillus Ferrooxidans and a Mixed Culture of Acidithiobacillus Ferrooxidans and Acidithiobacillus Thiooxidans Like Bacterium in Shake Flasks
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Influence of CO₂ and O₂ Feeding Rates on the Continuous Bioleaching of a Chalcopyrite Concentrate Using Sulfolobus Metallicus
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The Effect of Chloride Ions and A. Ferrooxidans on the Oxidative Dissolution of the Chalcopyrite Evaluated by Electrochemical Noise Analysis (ENA)
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Control of the Redox Potential by Oxygen Limitation Inhibits Bioleaching of Pyrite
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Respirometry Studies of the Bioleaching of a Copper Ore in a Large Isothermal Column
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Bioleaching of Low-Grade Copper Sulfide Ore Using a Colum Reactor
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The Effect of Nutrient Supplementation on Growth and Leaching Performance of Bioleaching Bacteria
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Electrochemical Behavior of Massive Bornite Bioleached Electrodes in the Presence of Acidithiobacillus Ferrooxidans and Acidithiobacillus Caldus
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 71-73Control of the Redox Potential by Oxygen...

Control of the Redox Potential by Oxygen Limitation Inhibits Bioleaching of Pyrite

Abstract:

Based on the bioleaching mechanism and electrochemical studies of metal sulfides, the dissolution rate of secondary copper sulfides and pyrite are controlled by redox potentials. Experiment on the bioleaching of the secondary copper sulfides under constant potential by sparging with nitrogen gas demonstrated, by analyzing Cu and Fe content of the bioleaching solution and residues, the pyrite and secondary cooper sulfides dissolution rates have large difference in various redox potential. The pyrite and secondary cooper sulfides have good selection when the redox potential controlled between 700mV and 760mV, we can realize the secondary copper sulfides bioleaching process be controlled, then supply theoretical guide for the iron-acid balance during copper bioleaching process.

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Periodical:

Advanced Materials Research (Volumes 71-73)

Pages:

401-404

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.71-73.401

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Online since:

May 2009

Authors:

Biao Wu, Jian Kang Wen, Gui Ying Zhou, Ren Man Ruan

Keywords:

Copper Sulfide, Pyrite, Redox Potential

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