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An aqueous mixture of goethite, quartz, and lead chloride (PbCl2) was treated with the sulfate‐reducing bacterium, Desulfovibrio desulfuricans G20 (D. desulfuricans G20), in a medium specifically designed to assess metal toxicity. In the presence of 26 μM of soluble Pb, together with the goethite and quartz, D. desulfuricans G20 grew after a lag time of 5 days compared to 2 days in Pb‐, goethite‐,...
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