• Journal of the Mineralogical Society of Korea
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• v.24 no.2
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• pp.83-90
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• 2011

Removal of dissolved uranium by D. baculatum, a sulfate-reducing bacterium, and effects of trace metals such as manganese, copper, nickel, and cobalt were investigated. Total concentrations of dissolved uranium and trace metals were used by $50\;{\mu}M$ and $200\;{\mu}M$, respectively. Most dissolved uranium decreased up to a non-detectable level (< 10 ppb) MS during the experiments. Most of the heavy metals did nearly not affect the bioremoval rates and amounts of uranium, but copper restrained microbial activity. However, it is found that dissolved uranium rapidly decreased after 2 weeks, showing that the bacteria can overcome the copper toxicity and remove the uranium. It is observed that nickel and cobalt were readily coprecipitated with biogenic mackinawite.