Study of inorganic ligand-chromium(III)-surface ternary complexes by ESR spectroscopy |
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| Authors: | Laurent Charlet Rainer Karthein |
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| Institution: | (1) Institute for Aquatic Sciences (EAWAG), Swiss Federal Institute of Technology (ETH), CH-8600 Dübendorf, Switzerland;(2) Physical Chemistry Laboratory, Swiss Federal Institute of Technology (ETH), CH-8092 Zürich, Switzerland |
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| Abstract: | Cr(III) sorbed at the solid/water interface of latex and hectorite was studied by ESR spectroscopy in the presence of different inorganic ligands. The ESR spectra of the surface obtained in the presence of selenite, phosphate and fluoride can be explained in terms of ternary surface complex formation. This is contrasted by the behaviour of sulfate and selenate ions which were found to have no effect on the ligand field of Cr(III), either in the adsorbed state or in solution. |
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| Keywords: | Electron spin resonance spectroscopy (ESR) surface complexation chromium selenite phosphate fluoride |
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