Abstract

Controlled porous glasses were used to study the dependence between the porous structure (obtained by means of the BET method) and the course of the kinetic curves of isotope exchange of ions between an aqueous solution and a surface layer formed on the porous solid. The results indicate that for the materials with a sharp peak on the curve of differential pore size distribution, there is a quantitative dependence between the situation of this peak and the time necessary to obtain −1n(1− F) = 2 where F is the exchange fraction.

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