Potential Bioleaching Effects in In Situ Recovery Applications

Constanze Richter; Harald Kalka; Horst Märten

doi:10.4028/www.scientific.net/SSP.262.456

Paper Titles

Metagenome-Derived Draft Genome Sequence of Acidithiobacillus ferrooxidans RV1 from an Abandoned Gold Tailing in Neuquén, Argentina
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Phage Display - A Promising Tool for the Recovery of Valuable Metals from Primary and Secondary Resources
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Simplified Expression and Production of Small Metal Binding Peptides
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Investigation of Fluoride Tolerance in Acidithiobacillus ferrooxidans
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Potential Bioleaching Effects in In Situ Recovery Applications
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Identification of Sulfur Activation Relevant Protein Genes of Extremely Thermophilic Acidianus manzaensis
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Evolution of Compositions and Contents of Capsule and Slime EPSs for Adaptation to and Action on Energy Substrates and Heavy Metals by Typical Bioleaching Microorganisms
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Resistance of Moderately Thermophilic Acidophilic Microorganisms to Ferric Iron Ions
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Effect of Galactose on EPS Production and Attachment of Acidithiobacillus thiooxidans to Mineral Surfaces
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HomeSolid State PhenomenaSolid State Phenomena Vol. 262Potential Bioleaching Effects in In Situ Recovery...

Potential Bioleaching Effects in In Situ Recovery Applications

Abstract:

The potential role of microorganisms in the in-situ recovery (ISR) of technology metals, in particular from reduced ores, is not well understood, but attracts increasing interest worldwide. Based on the feasibility criteria for ISR applications in general, effects of biota on kinetic rates of leaching are systematized. The indirect catalysis of leaching by microbial (re-)oxidation of Fe²⁺ to Fe³⁺ as directly acting e^- acceptor is a well verified mechanism, however, for practical applications this requires the availability of an oxidant in the leachant. The ex-situ bio-oxidation of Fe in an aerated bioreactor is considered as an alternative. Reactive transport simulations of ISR from sulfidic Cu ores based on kinetic rates as function of pH and oxidation potential (concentration of e^- acceptors) in comparison with thermodynamically driven metal dissolution (constrained by oxidation potential) demonstrate the key parameters for (bio-)leaching productivity.

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Periodical:

Solid State Phenomena (Volume 262)

Pages:

456-460

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.262.456

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Online since:

August 2017

Authors:

Constanze Richter*, Harald Kalka, Horst Märten

Keywords:

Bioleaching, In Situ Leaching, In Situ Recovery, Reactive Transport

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