IN SITU URANIUM STABILIZATION BY MICROBIAL METABOLITES

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Soil contaminated with U was the focus of this study in order to develop in-situ, U bio-immobilization technology. We have demonstrated microbial production of a metal chelating biopolymer, pyomelanin, in U contaminated soil from the Tims Branch area of the Department of Energy (DOE) Savannah River Site (SRS) as a result of tyrosine amendments. Bacterial densities of pyomelanin producers were >106 cells/g wet soil. Pyomelanin demonstrated U chelating and mineral binding capacities at pH 4 and 7. In laboratory studies, in the presence of goethite or illite, pyomelanin enhanced U sequestration by these minerals. Tyrosine amended soils in field tests ... continued below

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Turick, C; Anna Knox, A; Chad L Leverette,C & Yianne Kritzas, Y November 29, 2006.

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Soil contaminated with U was the focus of this study in order to develop in-situ, U bio-immobilization technology. We have demonstrated microbial production of a metal chelating biopolymer, pyomelanin, in U contaminated soil from the Tims Branch area of the Department of Energy (DOE) Savannah River Site (SRS) as a result of tyrosine amendments. Bacterial densities of pyomelanin producers were >106 cells/g wet soil. Pyomelanin demonstrated U chelating and mineral binding capacities at pH 4 and 7. In laboratory studies, in the presence of goethite or illite, pyomelanin enhanced U sequestration by these minerals. Tyrosine amended soils in field tests demonstrated increased U sequestration capacity following pyomelanin production up to 13 months after tyrosine treatments.

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  • Journal Name: Journal of Environmental Radioactivity

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  • Report No.: WSRC-STI-2006-00322
  • Grant Number: DE-AC09-96SR18500
  • Office of Scientific & Technical Information Report Number: 896529
  • Archival Resource Key: ark:/67531/metadc888792

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  • November 29, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 2, 2016, 12:55 p.m.

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Turick, C; Anna Knox, A; Chad L Leverette,C & Yianne Kritzas, Y. IN SITU URANIUM STABILIZATION BY MICROBIAL METABOLITES, article, November 29, 2006; [Aiken, South Carolina]. (digital.library.unt.edu/ark:/67531/metadc888792/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.