Characterization of the sorption of europium(III) on calcite by site-selective and time-resolved luminescence spectroscopy
- Ecole Centrale Paris, Chatenay-Malabry (France). Lab. de Chimie et Physico-Chimie Moleculaire
- Centre National de la Recherche Scientifique, Vitry-sur-Seine (France). Centre d`Etudes de Chimie Metallurgique
Sorption of europium(III) on calcite from aqueous solution was investigated by kinetics and sorption isotherms at 323 K and by site-selective and time-resolved luminescence spectroscopy at 15 K. Three sorption sites (A, B, C) were characterized by this last technique. B constitutes a major family which appears in all samples with sorbed Eu and is characterized by an environment involving water or hydroxyl ions. The C family is observed only for the highest Eu concentrations. In these sites, the environment is more hydrated than in sites B. Site A constitutes a minority but appears in all samples. It corresponds to the centrosymmetric structural Ca site of calcite in position 2b, thus demonstrating that sorbed Eu(III) can substitute for Ca in calcite.
- OSTI ID:
- 556673
- Journal Information:
- Journal of Colloid and Interface Science, Vol. 194, Issue 2; Other Information: PBD: 15 Oct 1997
- Country of Publication:
- United States
- Language:
- English
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