Diffusion mechanism of Cs+, Zn2+ and Eu3+ ions in the particles of zirconium titanate ion exchanger using radioactive tracers

Diffusion behaviour of Cs+, Zn2+ and Eu3+ ion exchange on zirconium titanate (ZrTi) were studied under particle diffusion conditions and the limited batch technique. The values of the diffusion coefficients, activation energy and the entropy of activation were calculated and compared with those obtained for other inorganic and organic resins. The values of the obtained effective diffusion coefficient were found to increase in the order Cs+>Zn2+>Eu3+. The activation energy was found to decrease with decreases in the entropy of the activation of the system. From all the data obtained it is anticipated that the above mentioned cations are exchanged with H− of ZrTi in the unhydrated form.