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- Title
Oxidative Remobilization of Biogenic Uranium(IV) Precipitates: Effects of Iron(II) and pH.
- Authors
Lirong Zhong; Liu, Chongxuan; Zachara, John M.; Kennedy, Dave W.; Szecsody, James E.; Wood, Brian
- Abstract
This article presents a study which investigates the oxidative remobilization of uranium (U) from biogenic U(IV) precipitates in bioreduced sediment suspensions in contact with atmospheric oxygen with an emphasis on the influence of iron and pH on the rate and extent of U release from the solid to the aqueous phase. The results of this study contribute to the understanding of the stability and remobilization of biogenic uranium dioxide when subsurface environments that have been stimulated by electron donor additions return to normal oxic conditions. The sediment was obtained from the background site at the U.S. Department of Energy Office of Biological and Environmental Research Natural and Accelerated Bioremediation Research Field Research Center in West Bear Creek Valley at the Oak Ridge site in eastern Tennessee. This study demonstrated that biogenic uranium dioxide is readily oxidized by atmospheric oxygen.
- Subjects
UNITED States; URANIUM isotopes; BIOREMEDIATION; BIOGENIC amines; OXYGEN; HYDROGEN-ion concentration; UNITED States. Dept. of Energy
- Publication
Journal of Environmental Quality, 2005, Vol 34, Issue 5, p1763
- ISSN
0047-2425
- Publication type
Article
- DOI
10.2134/jeq2005.0057