Total Reducing Capacity in Aquifer Minerals and Sediments [electronic resource] : Quantifying the Potential to Attenuate Cr(VI) in Groundwater
- Washington, D.C. : United States. Department of Energy. Office of Environmental Restoration and Waste Management, 2015. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- 14 pages : digital, PDF file
- Additional Creators:
- Savannah River National Laboratory (U.S.), United States. Department of Energy. Office of Environmental Restoration and Waste Management, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Hexavalent chromium, Cr(VI), is present in the environment as a byproduct of industrial processes. Due to its mobility and toxicity, it is crucial to attenuate or remove Cr(VI) from the environment. The objective of this investigation was to quantify potential natural attenuation, or reduction capacity, of reactive minerals and aquifer sediments. Samples of reduced-iron containing minerals such as ilmenite, as well as Puye Formation sediments representing a contaminated aquifer in New Mexico, were reacted with chromate. The change in Cr(VI) during the reaction was used to calculate reduction capacity. This study found that minerals that contain reduced iron, such as ilmenite, have high reducing capacities. The data indicated that sample history may impact reduction capacity tests due to surface passivation. Further, this investigation identified areas for future research including: a) refining the relationships between iron content, magnetic susceptibility and reduction capacity, and b) long term kinetic testing using fresh aquifer sediments.
- Published through SciTech Connect., 07/20/2015., "srnl-sti--2015-00358", and Sisman, S.
- Funding Information:
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