Abstract
Heterophasic substitution of Group I and Group II metal cations for hydrogen ions of titanyl hydrogen phosphate in aqueous solutions has been studied by a potentiometric method. The thermodynamic parameters of the process have been determined. The exchange constants depend on the degree of cation hydration and increase in the following orders: Li+ < Na+ < K+ < Rb+ < Cs+ and Mg2+ < Ca2+ < Sr2+ < Ba2+. Our results make it possible to determine conditions for the efficient deactivation of high-salt liquid radioactive wastes and for the synthesis of stoichiometric compounds of the KTP family.
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