Authors : Sanjiokumar S. Rahangdale, Dinesh D. Kamdi, Jyotsna V. Khobragade and Wasudeo B. Gurnule*
Page Nos : 274-283
Description :
The PBF copolymer resin was synthesized by the condensation of pyrogallol and biuret with formaldehyde in the
presence of 2M HCl as a catalyst at 124 ± 2 0C for 5 h with molar proportion of reactants. The PBF copolymer resin has
been characterized by UV-visible, IR and proton NMR spectral studies. The PBF copolymer proved to be a selective
chelating ion-exchange polymer for certain metals. Chelating ion-exchange properties of this polymer were studied for
Fe3+, Cu2+, Ni2+, Co2+, Zn2+, Cd2+ and Pb2+ ions. A batch equilibrium method has been employed in the study of the
selectivity of metal-ion uptake involving the measurements of the distribution of a given metal ion between the
copolymer sample and a solution containing the metal ion. The study was carried out over a wide pH range and in
media of various ionic strengths. The polymer showed higher selectivity for Fe3+, Cu2+, Ni2+than forCo2+, Zn2+, Cd2+ and
Pb2+ions. Study of distribution ratio as a function of pH indicates that the amount of metal ion taken by PBF
copolymer resin increases with the increasing pH of the media.
