A computer simulation technique has been applied to solve the Nernst-Planck equations for the kinetics of exchange of alkali metal ions (Li+, Na+ and K+). Activation energy and the self diffusion coefficient were found to be linear functions of hydration energies and the ionic radii of these ions, respectively. It has been proposed, on the basis of kinetic parameters, that the exchange of alkali metal ions occurs in the unhydrated form. They shed most of their water of hydration at the surface of the beads and then again get hydrated after being exchanged. The exchanger appears to have a zeolite type structure.
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Qureshi et al. (1986) studied this question.
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