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Ferrous iron oxidation and leaching of copper ore with halotolerant bacteria in ore columns

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Davis-Belmar, Carol S., Nicolle, James Le C. and Norris, Paul R.. (2008) Ferrous iron oxidation and leaching of copper ore with halotolerant bacteria in ore columns. Hydrometallurgy, Volume 94 (Number 1-4, Special issue SI). pp. 144-147. ISSN 0304-386X

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Abstract

Growth on ferrous iron of a new isolate of the acidophile Thiobacillus prosperus occurred with a substrate oxidation rate similar to that of Acidithiobacillus ferrooxidans. As well as similar capacities for iron oxidation, these species were shown to possess similar, but not identical, clusters of genes (the rus operon) that encode proteins likely to be involved in transfer of electrons from ferrous iron. Abundant rusticyanin was present in acidified, cell-free extracts of T prosperus. In contrast to these similarities between the species, T prosperus grew at a salt (NaCl) concentration several times that which prevented growth of A. ferrooxidans. A mixed culture of halotolerant bacteria maintained continuous ferrous iron oxidation in the presence of 5% w/v NaCl in solution percolating through ore in laboratory columns, and so enhanced ferric iron-dependent solubilization of copper. (C) 2008 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
T Technology > TN Mining engineering. Metallurgy
T Technology > TP Chemical technology
Divisions: Faculty of Science > Life Sciences (2010- ) > Biological Sciences ( -2010)
Library of Congress Subject Headings (LCSH): Iron -- Oxidation, Thiobacillus, Leaching, Copper ores
Journal or Publication Title: Hydrometallurgy
Publisher: Elsevier BV
ISSN: 0304-386X
Official Date: November 2008
Volume: Volume 94
Number: Number 1-4, Special issue SI
Number of Pages: 4
Page Range: pp. 144-147
Identification Number: 10.1016/j.hydromet.2008.05.030
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: BHP Billiton, Guernsey (Channel Islands). States
Version or Related Resource: Presented at: 17th International Biohydrometallurgy Symposium, Frankfurt am Main, Germany, Sep 02-05, 2007
Type of Event: Conference
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URI: http://wrap.warwick.ac.uk/id/eprint/29081

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