Abstract
Argillaceous rock formation of Cuddapah System are under evaluation as the potential host rock for deep geological repository in India. Sorption of Ba(II), as a chemical analogue of 90Sr, on argillaceous rock formation has been investigated by batch sorption method. The effect of pH, ionic strength and [Ba(II)] on Ba(II) sorption has been investigated. Ba(II) sorption was found to be independent of pH and decreased with increasing ionic strength, indicating ion exchange as dominant sorption mode for Ba(II). Ba(II) adsorption isotherm was linear up to [Ba(II)] = 3.0 × 10–6 M. Ba(II) sorption was successfully modeled using surface complexation modeling.
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