GEOC 42 |
| C V Gopal Reddy and D.R. Strongin. Chemistry, Temple University, 1901 N & 13th Street, Philadelphia, PA 19122 |
| Calcite plays a role in important environmental areas, including global carbon dioxide (CO2) exchange and the sorption of toxic metals. Research will be presented that used surface analytical probes to investigate the reactivity of cleaved calcite surfaces (1014) toward Pb and Cd. Various experimental techniques, including X-ray photoelectron spectroscopy (XPS), Ion Scattering Spectroscopy (ISS) and atomic force microscopy (AFM) were used to study the chemical and physical interactions between calcium and the divalent aqueous species. A particular emphasis of our work was to determine the relationship among bulk crystal structure, surface structure, and metal uptake mechanism. Differences and similarities between the adsorption and bulk absorption behavior of Pb and Cd will be emphasized. |
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Chemistry of Metals in Terrestrial and Aquatic Systems
1:30 PM-5:10 PM, Monday, March 29, 2004 Marriott -- Marquis NE, Oral
Division of Geochemistry |