GEOC 9 |
| Scott C. Brooks1, Philip M. Jardine1, Mark O. Barnett2, and Scott Fendorf3. (1) Environmental Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, MS 6038, Oak Ridge, TN 37831-6038, (2) Department of Civil Engineering, Auburn University, 238 Harbert Engineering Center, Auburn, AL 36849, (3) Department of Geological & Environmental Sciences, Stanford University, Braun Hall, Bld. 320, Room 118, Stanford, CA 94305 |
| Thousands of metal contaminated sites on Department of Defense sites are awaiting cleanup and closure. Nontoxic, low-cost, commercially available amendments are being evaluated for their ability to diminish the potential for offsite metal migration and to enhance metal sequestration in soils. Soils contaminated with cadmium and aged for different lengths of time are amended with peat. The soils are subsequently subjected to continuous leaching with increasingly aggressive solutions to evaluate the influence of this amendment on Cd mobility. The peat has been characterized with respect to its acid-base behavior, Cd binding capacity, sulfur content and S oxidation state. These macroscale observations are coupled with x-ray absorption spectroscopy to reveal the mechanisms of Cd-peat interactions. |
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Chemistry of Metals in Terrestrial and Aquatic Systems
8:00 AM-11:25 AM, Sunday, March 28, 2004 Marriott -- Marquis NE, Oral
Division of Geochemistry |