Reductive immobilization of U(VI) in Fe(III) oxide-reducing subsurface sediments: Analysis of coupled microbial-geochemical processes in experimental reactive transport systems
Although the fundamental microbiological and geochemical processes underlying the potential use of dissimilatory metal-reducing bacteria (DMRB) to create subsurface redox barriers for immobilization of uranium and other redox-sensitive metal/radionuclide contaminants are well-understood (Lovley et al., 1991; Gorby and Lovley, 1992; Lovley and Phillips, 1992; Lovley, 1995; Fredrickson et al., 2000; Wielinga et al., 2000; Wielinga et al., 2001), several fundamental scientific questions need to be addressed in order to understand and predict how such treatment procedures would function under in situ conditions in the subsurface. These questions revolve around the dynamic interactions between hydrologic flux and the coupled microbial-geochemical processes which are likely to occur within a redox barrier treatment zone.
- Research Organization:
- University of Alabama, Tuscaloosa, AL; Auburn University, Auburn, AL (US)
- Sponsoring Organization:
- University of Alabama, Tuscaloosa, AL; Auburn University, Auburn, AL (US)
- DOE Contract Number:
- FG07-96ER62321
- OSTI ID:
- 834689
- Report Number(s):
- EMSP-73914-2002
- Country of Publication:
- United States
- Language:
- English
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DOE/EMSP--73914-Final
Conceptual and numerical model of uranium(VI) reductive immobilization in fractured subsurface sediments