CHELATING RESIN CONTAINING S-BONDED DITHIZONE FOR THE SEPARATION OF COPPER(II), NICKEL(II) AND ZINC(II)

Analytical and physicochemical properties of a crosslinked poly (vinyl pyridine) based resin containing dithizone were examined. The resin w as further used for the preconcentration of copper, nickel and zinc at batch and column level. Various conditions such as pH, equilibration time, temperature were optimised for the maximum loading of copper, ni ckel and zinc. The loading capacities of the resin for copper, nickel and zinc were observed to be 0.51, 0.59 and 0.65 mmol g(-1) of dry res in respectively. Elution of loaded copper, nickel and zinc from the re sin was done by using 0.1 M HCl, 0.1 M H2SO4 and 0.1 M HNO3 respective ly. Separation of copper, nickel and zinc in binary and ternary mixtur es was achieved without any cross contamination. (C) 1998 Elsevier Sci ence B.V.