Immobilization of toxic metals and radionuclides in porous and fractured media: Optimizing biogeochemical reduction versus geochemical oxidation. 1997 annual progress report
- Oak Ridge National Lab., TN (US)
- Florida International Univ., Miami, FL (US)
- Pacific Northwest National Lab., Richland, WA (US)
- Univ. of Idaho, Moscow, ID (US)
'The purpose of the authors research is to provide an improved understanding and predictive capability of the mechanisms that allow metal-reducing bacteria to be effective in the bioremediation of subsurface environments contaminated with toxic metals and radionuclides. The research findings of the work plan will (1) provide new insights into the previously unexplored areas of competing geochemical and microbiological oxidation/reduction reactions that govern the fate and transport of redox sensitive contaminants in subsurface environments and (2) provide basic knowledge to define the optimum conditions for the microbial reduction and concomitant immobilization of toxic metals and radionuclides in the subsurface. Strategies that use in situ contaminant immobilization can be efficient and cost-effective remediation options. This project will focus on the following specific objectives. Develop an improved understanding of the rates and mechanisms of competing geochemical and microbiological oxidation/reduction reactions that govern the fate and transport of uranium (U), chromium (Cr), and cobalt-EDTA (Co-EDTA) in the subsurface. Quantify the conditions that optimize the microbial reduction of toxic metals and radionuclides for the purpose of contaminant containment and remediation in heterogeneous systems that have competing geochemical oxidation, sorption, and organic ligands.'
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Florida International Univ., Miami, FL (US); Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Univ. of Idaho, Moscow, ID (US)
- Sponsoring Organization:
- USDOE Office of Environmental Management (EM), Office of Science and Risk Policy
- OSTI ID:
- 13479
- Report Number(s):
- EMSP-55267-97; ON: DE00013479
- Country of Publication:
- United States
- Language:
- English
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