Evaluation of thermodynamic quantities etc. in the cation exchange of Mg2+ from magnesium saturated bentonite and vermiculite

Summary Cation exchange studies have been carried out between Mg-saturated bentonite and vermiculite and a number of monovalent electrolytes. According to the distribution and selectivity coefficients the cations are preferred in the order: Li Na43)₄N (C₂H₅)₄N for betonite and Li < Na < NH₄ < K < Rb < Cs < H and (C₂H₅)₄N < (CH₃)₄N for vermiculite. The selectivity coefficient of H⁺ is found to be much greater than other inorganic ions.TheG-values of the cation exchange reaction have been calculated by an equation ofBarrer. The experimental data were analyzed by the theoretical approach ofPauley too.