Abstract
The copolymer 2,4-DHP-1,5-DANF-I has been synthesized by the condensation of 2,4-dihydroxypropiophenone, 1,5-diaminonaphthalene and formaldehyde in the presence of 2 molar HCl as a catalyst with 1:1:2 molar proportion of reactants. The resin has been characterized by various spectral techniques such as elemental analysis, FT-IR, 1H NMR. The ion-exchange properties of the copolymer resin for specific metal ions viz. Ni2+, Cu2+, Co2+, Zn2+ and Pb2+ ions was evaluated by a batch equilibrium method. The study was extended to three variations: evaluation of metal ion uptake in the presence of different electrolytes at different concentrations; evaluation of metal ion uptake at different pH; and evaluation of metal ion uptake at different times. From the results it was observed that the copolymer resin acts as an effective chelting ion-exchanger. Copolymer shows a higher selectivity for Cu2+ and Ni2+ ion than for Co2+, Zn2+ and Pb2+ ions.
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