GEOC 173 |
| Derek Peak, Department of Soil Science, Department of Soil Science, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK S7N 5A8, Canada |
| Selenite (SeO32-) is an oxyanion of environmental importance due to its toxicity to animals at higher concentrations, notably waterfowl and grazing animals. Sorption of selenite with mineral phases typically controls the movement and bioaccessibility of selenite in soils and sediments. In this presentation we will compare results from XANES, FTIR, and Raman spectroscopic studies of selenite in aqueous solution and adsorbed on mineral phases. The pH dependence of selenite adsorption on iron oxides, the bonding mechanisms of selenite on aluminum oxides and clay minerals, and the changes in spectra upon protonation will be discussed in detail. |
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Vibrational Spectroscopy in the Earth and Environmental Sciences
8:00 AM-11:40 AM, Thursday, April 1, 2004 Marriott -- Marquis NE, Oral
Division of Geochemistry |