Aqueous Complexation Reactions Governing the Rate and Extent of Biogeochemical U(VI) Reduction

Brooks, Scott C. ; Dong, Wenming ; Carroll, Sue ; Fredrickson, Jim ; Kemner, Ken ; Kelly, Shelly

Oak Ridge National Laboratory

关键词: Uranium;    Biogeochemistry;    59 Basic Biological Sciences;    38 Radiation Chemistry, Radiochemistry, And Nuclear Chemistry;    Reduction;   

DOI  :  10.2172/895942
RP-ID  :  ERSD-1024842-2006
RP-ID  :  None
RP-ID  :  895942

美国|英语

来源: UNT Digital Library

【 摘 要 】

The proposed research will elucidate the principal biogeochemical reactions that govern the concentration, chemical speciation, and reactivity of the redox-sensitive contaminant uranium. The results will provide an improved understanding and predictive capability of the mechanisms that govern the biogeochemical reduction of uranium in subsurface environments. In addition, the work plan is designed to: (1) Generate fundamental scientific understanding on the relationship between U(VI) chemical speciation and its susceptibility to biogeochemical reduction reactions. ? Elucidate the controls on the rate and extent of contaminant reactivity. (2) Provide new insights into the aqueous and solid speciation of U(VI)/U(IV) under representative groundwater conditions.