Equilibria and kinetics of cobalt, nickel, and copper ion exchange on Titanium(IV) antimonate

The ion exchange equilibrium of cobalt, nickel and copper metal ions/H+ sys tem were studied on Titanium(IV) antimonate in aqueous media at 30, 40 and 60 degreesC. On the basis of particle diffusion control different physical parameters e.g. the effective diffusion coefficients, activation energy and entropy of activation have been evaluated. Capacity measurements and titra tion curves have been determined. The obtained data were compared to those organic resin and inorganic ion exchangers. The influence of coordination n umber and the cation structure on the exchange mechanism have been studied on the light of the thermodynamic properties.