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Study uncovers bacteria's worst enemy

re likely to cause problems for the bacteria."

Generally, bacteria used for bioremediation are selected to target a specific form and oxidation state of toxic pollutants, such as soluble hexavalent uranium carbonate for uranium contamination. However, a single chemical rarely contaminates soils and groundwater and combinations of actinides, radionuclides, organic chemicals and metal regularly exist at many nuclear sites. Based on the results of this study, if bioremediation is to be effective at these types of sites, the operative microorganisms must be able to grow, function and do better than other bacteria in the presence of all kinds of contaminants.

The study examined the effects of toxicity of actinides, metals and chelators on different bacteria being evaluated for radionuclide bioremediation, Deinococcus radiodurans and Pseudomonas putida, along with the toxicity of plutonium on the bacteria Shewanella putrefaciens.

In addition to Neu, the bacteria bioremediation study team includes Christy Ruggiero and Hakim Boukhalfa of the Chemistry Division, and Joseph Lack and Larry Hersman from the Laboratory's Bioscience Division.


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Source:DOE/Los Alamos National Laboratory


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