Synthesis and Analytical Applications of a Chelating Resin

Abstract-Resorcinol and ethylene diamine with formaldehyde (REF) terpolymer has been synthesized by polycondensation technique in 2M HCl medium and used as a chelating resin for the removal of few divalent toxic metal ions. The physico-chemical parameters such as moisture, solid percentage, void volume, true density and sodium exchange capacity were calculated for the resin. Fourier transform infrared and nuclear magnetic resonance spectroscopic methods were used to elucidate the structure of the resin. Average molecular weight of the resin was determined by viscometry. Scanning electron microscopy (SEM) was used to determine the surface features of the resin. The chelation ion-exchange property of the resin showed an effective binding capacity for few divalent cations. A batch equilibration method was employed to study the selectivity of the metal ion uptake over a wide range of concentrations, pH ranges and at different time intervals