Abstract
The interaction of uranium with cells of three recently described eco-types of Acidithiobacillus ferrooxidans recovered from uranium mining wastes was studied. The uranium sorption studies demonstrated that the strains from these types possess different capabilities to accumulate and tolerate uranium. The amount of uranium biosorbed by all A. ferrooxidans strains increased with considerable concentrations. We have found that the representatives of type II accumulate significantly higher amounts of uranium in comparison to the other A. ferrooxidans strains. The investigations of the tolerance to uranium showed that the types I and III are resistant to 8 and 9 mM of uranium respectively, whereas the type II does not tolerate more than 2 mM of uranium. The recovery of the accumulated uranium by desorption was investigated using various desorbing agents as sodium carbonate, sodium citrate and EDTA at different concentrations. Sodium carbonate was the most efficient desorbing agent, removing 97% of the uranium sorbed from the cells of A. ferrooxidans type III, and 88.33 and 88.50% from the cells of the types I and II, respectively.
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Merroun, M.L., Selenska-Pobell, S. Interactions of three eco-types of Acidithiobacillus ferrooxidans with U(VI). Biometals 14, 171–179 (2001). https://doi.org/10.1023/A:1016658209397
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DOI: https://doi.org/10.1023/A:1016658209397