Measurement of diffusion coefficients of thallium ion in H2O and D2O systems at different concentrations

Sliding cell method, developed in our laboratory, has been used to measure the inter diffusion coefficient of thallium ion in thallous sulphate solution over a wide concentration range using both water and heavy water as solvent at 35°C. The results have been analysed from the point of view of both ion-ion and ion-solvent interactions. The comparison of the diffusivities of the same ion in D₂O and H₂O electrolyte solutions at the same temperature indicate that the addition of salt affects the two solvents differently.