Electrochemical Process Engineering in Biohydrometallurgical Metal Recovery from Mineral Sulfides

Christoph Tanne; Axel Schippers

doi:10.4028/www.scientific.net/SSP.262.118

Paper Titles

Bio-Heap Leaching of Primary Copper Sulfide Ore by JOGMEC
p.99

Fabrication and Application of Polyethylenimine/Ca-Alginate Blended Hydrogel Fibers as High-Capacity Adsorbents for Recovery of Gold from Acidic Solutions
p.103

Selective Chemical and Biological Metal Recovery from Cu-Rich Bioleaching Solutions
p.107

Bioleaching of Tailings Resulting from Benefication of Polymetallic Ores for Recovery of Valuable Metals
p.113

Electrochemical Process Engineering in Biohydrometallurgical Metal Recovery from Mineral Sulfides
p.118

Heap Biooxidation of Gold-Sulphide and Polymetallic Ores and Tailings
p.122

Screening of Important Variables of Organic Acids Degradation by Phanerochaete chrysosporium Using Plackett-Burman Design in Refractory Arsenic-Bearing and Carbonaceous Gold Ores
p.126

Biogenic Hydrogen Sulfide for Cyanide Regeneration in Solutions during Cupriferous Gold Ores Processing
p.131

Microbial Community Analysis inside a Biooxidation Heap for Gold Recovery in Equador
p.135

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Electrochemical Process Engineering in Biohydrometallurgical Metal Recovery from Mineral Sulfides

Abstract:

Primary copper sulfides are recalcitrant to bioleaching, probably due to semi-conductivity or passivation effects which result in slow dissolution kinetics. The mineral dissolution strongly depends on redox reactions and, consequently, electrochemical techniques are recommendable for analyzing and processing of redox-active minerals. For this reason we installed a three electrode system into a conventional bioreactor. Electrolytic bioleaching was applied to a copper concentrate from black shale ore. First results verified the operational capability of ferric iron reduction during electrochemical leaching and that bioleaching is not hindered by the physical presence of the electrochemical setup. Although the working electrode was able to reduce ferric iron and to regenerate it as electron supply for ferrous iron oxidizing microorganisms, the electron input into the bioleaching process has to be further increased to keep up with fast biocatalytical iron oxidation.

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Solid State Phenomena (Volume 262)

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118-121

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https://doi.org/10.4028/www.scientific.net/SSP.262.118

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Online since:

August 2017

Authors:

Christoph Tanne*, Axel Schippers

Keywords:

Bioleaching, Electrochemical Engineering, Solution Redox Potential

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