Saline Water Bioleaching with Thermophilic Fe(II) Oxidising Microorganisms

Melissa K. Corbett; David Collinson; Denis Shiers; Anna H. Kaksonen; Helen Watling; Elizabeth L.J. Watkin

doi:10.4028/www.scientific.net/AMR.1130.205

Paper Titles

In Situ Characterization of Relevance of Surface Microstructure and Electrochemical Properties of Chalcopyrite to Adsorption of Acidianus manzaensis
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Factors Affecting the Selection of BIOX^® as the Preferred Technology for the Treatment of a Refractory Gold Concentrate
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Base Metal Tank Bioleaching: From Laboratory Test Work to Commercialization
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Geobiotechnical Recovery of Metals from Manganese Nodules: First Experiments
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Saline Water Bioleaching with Thermophilic Fe(II) Oxidising Microorganisms
p.205

Role of Microbial Activity in Bioleaching of a Pyritic and a Pure Chalcopyrite Concentrate
p.209

Oxygen-Enriched Gas in Bioleaching Stirred Reactors and its Impact on the Consortium Behaviour
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Organic Carbon Utilisation by Iron(II)-Oxidising Bacteria Sulfobacillus thermosulfidooxidans and Alicyclobacillus Strain FP1 that Inhabit Copper Sulfide Leaching Heaps
p.218

Effect of Different Solvent Extractants on the Activity and Community Structure of Acidophilic Microorganisms
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1130Saline Water Bioleaching with Thermophilic Fe(II)...

Saline Water Bioleaching with Thermophilic Fe(II) Oxidising Microorganisms

Abstract:

The chloride tolerance of three Fe (II)- and sulfur-oxidising thermophiles and the effect of chloride on metals extraction from mineral sulfides were studied. Initially, 10-day bioleaching tests (60 °C) were conducted using pyrite (FeS₂), chalcopyrite (CuFeS₂) or pentlandite ((Ni,Fe)₉S₈) concentrates as substrate in basal salts medium (BSM), and the activities of Sulfolobus (S.) metallicus, Acidianus (A.) brierleyi and Metallosphaera (M.) hakonensis were compared. Fe (II) oxidation, as indicated by an increase in oxidation reduction potential (ORP), was observed in all combinations except A. brierleyi growing on chalcopyrite. The presence of added NaCl resulted in lower ORP after 10 days of bioleaching in all cases. In ancillary tests using BSM-Fe (II) growth medium with added NaCl it was found that cell counts at the end of Fe (II) biooxidation provided the most reliable estimate of tolerance to NaCl. On this basis, the rank order of salt tolerance is S. metallicus >>>A. brierleyi > M. hakonensis.

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Periodical:

Advanced Materials Research (Volume 1130)

Pages:

205-208

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1130.205

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Online since:

November 2015

Authors:

Melissa K. Corbett, David Collinson, Denis Shiers, Anna H. Kaksonen, Helen Watling, Elizabeth L.J. Watkin*

Keywords:

Acidophile, Bioleaching, Chloride, Salinity, Thermophile, Tolerance

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