Chelating ion-exchange properties of homopolymer and copolymers of N-(4-carboxy-3-hydroxyphenyl))maleimide

Add time:07/30/2019    Source:sciencedirect.com

The homopolymer of CHPM and its copolymers with styrene and divinylbenzene (DVB), prepared by addition polymerization, proved to be selective chelating ion-exchange polymers. The chelating ion-exchange properties of these polymers were studied for Ca2+, Cr3+, Fe3+, Ni2+, Cu2+, Zn2+, Cd2+ and Pb2+ ions using a batch equilibrium method. The study was carried out over a wide pH range and in media of various ionic strengths. The polymers showed good selectivity for Fe3+, Ni2+ and Pb2+ ions compared to the other ions under study. The results of the separation study of Pb2+ from the Pb2+Ca2+ admixture and Fe3+ from the Fe3+Cr3+ admixture were promising. The regeneration study indicated that the polymers could be reused several times and the best stripping agent was 1.0 M H2SO4.

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