Abstract
The kinetics of exchange of alkali metal ions on Al-13-phosphatoantimonic acid was studied. The investigations were carried out under particle diffusion mechanism and the limited batch technique. The effect of particle size, concentration and temperature has been studied. The effective diffusion coefficient, activation energy and entropy of activation have been evaluated. The effective diffusion coefficient of the alkali metal ions were found to be in order Cs > K > Na > Li. The relationship of Ea − ΔS* is discussed in the light of the structure of the exchange material.
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