Characteristics of a moderately thermophilic and acidophilic iron-oxidizing Thiobacillus |
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| Authors: | James A Brierley Paul R Norris Donovan P Kelly Norman W Le Roux |
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| Institution: | (1) Department of Environmental Sciences, University of Warwick, CV4 7AL Coventry, England;(2) Department of Industry, Warren Spring Laboratory, SG1 2BX Stevenage, Herts, England;(3) Present address: Department of Biology, New Mexico Institute of Mining and Technology, 87801 Socorro, NM, USA |
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| Abstract: | Summary
Thiobacillus TH1 is an acidophilic chemolithotrophic heterotroph growing at temperatures up to about 50°C on media containing ferrous iron or pyrite when supplemented with yeast extract or glutathione. Virtually no carbon dioxide fixation occurred during growth on iron with yeast extract. Its DNA contains 48 mol % guanine + cytosine. The organism effects the thermophilic leaching of metals from pyrite, chalcopyrite, CuS, and copper concentrates. Oxidation of soluble ferrous iron at pH 1.6 was competitively inhibited by ferric iron and had a Km of 7.3 mM FeSO4. |
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