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Study on cation-exchange kinetics of Zr and Hf as homologues of $$_{104}$$Rf with H$$_{2}$$SO$$_{4}$$ solutions

Ikarashi, Satoshi*; Sueki, Keisuke*; Li, Z.*; Tsukada, Kazuaki ; Nagame, Yuichiro

To study ion-exchange kinetics on the diffusion processes of Rf and its homologues, Zr and Hf, with the cation-exchange resin in H$$_{2}$$SO$$_{4}$$ solutions, we obtained the fractional attainment of equilibrium of the carrier-free radiotracers $$^{88}$$Zr and $$^{175}$$Hf adsorbed on the cation-exchange resin as a function of contact time within 300 seconds by the batch experiment. We discussed the dependence of functions of the fractional attainment of equilibrium on temperatures, concentrations of HSO$$_{4}$$- and radii of resins. It is result that the good agreement between experimental data and theoretical curves which the film diffusion control is the rate-determining step in the present ion-exchange process.

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