THERMODYNAMICS OF SINGLY CHARGED ION EXCHANGES IN THE TRACE REGIONS ON CAMP BERTEAU MONTMORILLONITE |
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| Authors: | J ROBEYNS R VAN BLADEL H LAUDELOUT |
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| Institution: | Institut des Sciences de la Terre, University of Louvain, Belgium |
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| Abstract: | Ion exchange equilibria for seven pairs of singly charged ions between aqueous chloride solutions and a montmorillonite clay have been studied at 25 °C for low values of the total normality of the equilibrium solution. Only the trace region for the preferred ion was investigated. Since the analogue of Henry's law was found to be valid, the exchanges being almost ideal, standard free energies were calculated from experimental data in the region where the analogue of Henry's law is obeyed by extrapolating to half-loading with one of the ions. The results satisfy the requirement of additivity and are in good agreement with known values. |
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