INORGANIC CATION-EXCHANGERS FOR ION-EXCHANGE-ASSISTOD ELECTRODIALISYS

摘要

Inorganic cation-exchangers with phosphate functional groups have been synthesized for further using in ion-exchange-assisted electrodialisys. The ion-exchange and electric conductive properties of ion-exchangers containing Na~+, K~+, Cs~+, Cu~(2+) cations were studied. Migration of cations adsorbed by the ion-exchangers into the cathod compartment of the electrodialisys cell of has been investigated. A linear dependence of the cation transport on the time has been found. The Nernst-Planck and the Nernst-Einstein equations were used to estimate the apparent diffusion coefficients for cations in the bed of the ion-exchanger. It was shown that the mobility of sorbed cation depends on the radius and chemical composition of the ion-exchanger.