J. Phys. IV France
Volume 7, Numéro C2, Avril 1997Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure
|Page(s)||C2-811 - C2-812|
J. Phys. IV France 7 (1997) C2-811-C2-812
Molecular Characterization of Cr Phases in Contaminated Soils by Cr and Fe EXAFS : A Tool for Evaluating Chemical Remediation StrategiesK.M. Kemner1, 2, D. B. Hunter3, E.J. Gall3, P.M. Bertsch3, J.P. Kirkland4 and W.T. Elam1
1 Naval Research Laboratory, Code 6685, Washington DC 20375, US.A.
2 Environmental Research Division, Argonne National Lab., Argonne IL 60439, U.S.A.
3 Advanced Analytical Center for Environmental Sciences, Univ. of Georgia/SREL, Aiken SC, U.S.A.
4 SFA Inc., Landover MD, U.S.A.
The successful remediation of Cr contaminated soils via chemical reduction and stabilization of soluble, toxic Cr(VI) species to insoluble Cr(III) species relies on the long term leachability and reoxidation of reduced Cr compounds. Information of Cr chemical environments is invaluable for evaluating the efficiency of proposed stabilization technologies. We describe a matrix of Fe and Cr K-edge EXAFS data on synthetic model compounds that have been used to identify different Fe and Cr local environments of two soil samples.
© EDP Sciences 1997