Spatial and Geochemical Spatial and Geochemical Heterogeneity Impacts on Iron Biomineralization and Uranium Sequestration
Bioreductive transformations of iron (hydr)oxides are a critically important processes controlling the fate and transport of contaminants in soil and aquifer systems. Heterogeneity arising from both chemical and physical conditions will lead to various biomineralization products of iron oxides and will additionally alter reactions controlling the partitioning of hazardous elements such as uranium. We are presently exploring chemical and mineralogical transformations within physically complex material having a range of pore-size distribution and chemical environments. Here we discuss the impact of calcium on the reactive transport of uranium and the spatial heterogeneity in iron hydroxide mineralization and concomitant uranium reduction along a diffusive flow path.
- Research Organization:
- Stanford University, Stanford, CA; Desert Research Institute; Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
- Sponsoring Organization:
- USDOE - Office of Science (SC)
- OSTI ID:
- 895317
- Report Number(s):
- CONF-NABIR2004-25
- Country of Publication:
- United States
- Language:
- English
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