Thermodynamics of Uni-Univalent H⁺/K⁺ and Uni-Bivalent H⁺/Ca²⁺ Ion Exchange Reactions Using Nuclear Grade Resin Indion-223

The present paper deals with the thermodynamic of uni-univalent and uni-bivalent ion exchange reactions using nuclear grade anion exchange resin Indion-223. It was observed that with rise in temperature the equilibrium constants K values for H⁺/K⁺ uni-univalet ion exchange reaction increases from 0.01710 to 0.02374. Similarly for H⁺/Ca²⁺ uni-bivalet ion exchange reaction the equilibrium constants K values increases from 0.000397 to 0.000639. The increase in K values with rise in temperature for both the reactions indicates its endothermic nature having the enthalpy change values of 22.72 and 38.92 kJ/ mol respectively. The technique used here can be extended further to standardise the process parameters in order to bring about the efficient separation of the desired ionic species from the solution