Sorption of copper ions on templated poly (4-vinyl pyridine) resins

Abstract

The equilibrium and kinetics sorption behaviour of copper ions at low solution concentration on CuH -templated poly (4·Yinyl pyridine) resins have been studied. The Langmuir isotherm equation tits the equilibrium sorption data well. while the kinetic data are in good agreement with a modified shrinking core model for fluid--solid chemical reactions. Pore diffusion controls the exchange rates at low solution concentration. Interestingly the diffusion coefficient which lies within the normal expected range for chelating resins is found to increase with increasing solution concentration. besides temperature. This phenomenon is discussed in the light of similar observations reported for ion exchange resins in the literature.