IN SITU URANIUM STABILIZATION BY MICROBIAL METABOLITES
Journal Article
·
· Journal of Environmental Radioactivity
OSTI ID:896529
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.
- Research Organization:
- SRS
- Sponsoring Organization:
- DOE
- DOE Contract Number:
- AC09-96SR18500
- OSTI ID:
- 896529
- Report Number(s):
- WSRC-STI-2006-00322
- Journal Information:
- Journal of Environmental Radioactivity, Journal Name: Journal of Environmental Radioactivity; ISSN 0265-931X; ISSN JERAEE
- Publisher:
- pubinfo
- Country of Publication:
- United States
- Language:
- English
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