@article {568,
	title = {Microorganisms associated with uranium bioremediation in a high-salinity subsurface sediment.},
	journal = {Appl Environ Microbiol},
	volume = {69},
	year = {2003},
	month = {2003 Jun},
	pages = {3672-5},
	abstract = {Although stimulation of dissimilatory metal reduction to promote the reductive precipitation of uranium has been shown to successfully remove uranium from some aquifer sediments, the organisms in the family Geobacteraceae that have been found to be associated with metal reduction in previous studies are not known to grow at the high salinities found in some uranium-contaminated groundwaters. Studies with a highly saline uranium-contaminated aquifer sediment demonstrated that the addition of acetate could stimulate the removal of U(VI) from the groundwater. This removal was associated with an enrichment in microorganisms most closely related to Pseudomonas and Desulfosporosinus species.},
	keywords = {Acetates, Biodegradation, Environmental, DNA, Ribosomal, Fresh Water, Geologic Sediments, Peptococcaceae, Polymerase Chain Reaction, Pseudomonas, RNA, Ribosomal, 16S, Sodium Chloride, Uranium, Water Pollution},
	issn = {0099-2240},
	author = {Nevin, Kelly P and Finneran, Kevin T and Lovley, Derek R}
}
@article {577,
	title = {Multiple influences of nitrate on uranium solubility during bioremediation of uranium-contaminated subsurface sediments.},
	journal = {Environ Microbiol},
	volume = {4},
	year = {2002},
	month = {2002 Sep},
	pages = {510-6},
	abstract = {Microbiological reduction of soluble U(VI) to insoluble U(IV) has been proposed as a remediation strategy for uranium-contaminated groundwater. Nitrate is a common co-contaminant with uranium. Nitrate inhibited U(VI) reduction in acetate-amended aquifer sediments collected from a uranium-contaminated site in New Mexico. Once nitrate was depleted, both U(VI) and Fe(III) were reduced concurrently. When nitrate was added to sediments in which U(VI) had been reduced, U(VI) reappeared in solution. Parallel studies with the dissimilatory Fe(III)-, U(VI)- and nitrate-reducing microorganism, Geobacter metallireducens, demonstrated that nitrate inhibited reduction of Fe(III) and U(VI) in cell suspensions of cells that had been grown with nitrate as the electron acceptor, but not in Fe(III)-grown cells. Suspensions of nitrate-grown G. metallireducens oxidized Fe(II) and U(IV) with nitrate as the electron acceptor. U(IV) oxidation was accelerated when Fe(II) was also added, presumably due to the Fe(III) being formed abiotically oxidizing U(IV). These studies demonstrate that although the presence of nitrate is not likely to be an impediment to the bioremediation of uranium contamination with microbial U(VI) reduction, it is necessary to reduce nitrate before U(VI) can be reduced. These results also suggest that anaerobic oxidation of U(IV) to U(VI) with nitrate serving as the electron acceptor may provide a novel strategy for solubilizing and extracting microbial U(IV) precipitates from the subsurface.},
	keywords = {Ferric Compounds, Ferrous Compounds, Geologic Sediments, Nitrates, Oxidation-Reduction, Proteobacteria, Soil Pollutants, Solubility, Uranium, Water Pollutants, Chemical},
	issn = {1462-2912},
	author = {Finneran, Kevin T and Housewright, Meghan E and Lovley, Derek R}
}
