Ion-exchange kinetics on styrene supported zirconium(IV) tungstophosphate: an organic-inorganic type cation exchanger

摘要

Kinetics of exchange reaction of Mg~(2+), Ca~(2+), Sr~(2+), Ba~(2+), Cu~(2+), Mn~(2+), Ni~(2+) and Zn~(2+) on styrene supported zirconium (IV) tungstophosphate cation exchanger has been studied at 25, 33, 50 and 65 deg C. The rate of exchange is found to be particle diffusion controlled at a metal ion concentration >= 0.02 M in aqueous medium. Various kinetic parameters such as self-diffusion coefficient, D_0, energy of activation, E_a and entropy of activation, #DELTA#S, have been calculated.