A number of ion-exchange resins have been synthesized by reacting 8-Hydroxyquinoline with dithiooxamide and formaldehyde in presence of 2M HCl as catalyst, proved to be selective chelating ion-exchange resin for certain metals. Chelation ion-exchange properties of the terpolymer resin was studied for Fe3+, Cu2+, Ni2+, Zn2+, Cd2+ and Pb2+ ions. A batch equilibrium method has been employed in the study of the selectivity of metal ions uptake involving the measurement of the distribution of a given metal ion between the polymer sample and a solution containing the metal ion. The study was carried out over a wide pH range and in media of various ions strengths. The terpolymer showed higher selectivity for Fe3+, Cu2+, and Ni2+ ions than for Co2+, Zn2+, Cd2+ and Pb2+ ions
