Authors : Manish M. Yeole and W. B. Gurnule
Page Nos : 355-358
Description :
Copolymer resin has been synthesized by the condensation of 2-hydroxy 4-methoxyacetophenone and dithiooxamide with formaldehyde in 2:1:3 molar ratio in presence of 2M hydrochloric acid as catalyst. The newly synthesized copolymer resin has been characterized by UV-visible, IR and proton NMR spectral studies. The copolymer p-HBOF 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 for Co2+, Zn2+, Cd2+ and Pb+2 ions. Study of distribution ratio as a function of pH indicates that the amount of metal ion taken by resin increases with the increasing pH of the medium.
Mathematical modeling: - An attempt has been done to present the metal ion selectivity of the resins with respect to time in the form of mathematical model. The model consists of two straight-line equations, involves all dependent and independent parameters. Graph obtained from actual experimental data is very much comparable to the graph plotted from the data provided by the model. This has been clearly shown by the reliability of the model, which is 94.6%.
Keywords: Mathematical model, Ion-exchange resin, polymer, chelation, batch method.
