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Title: Synthesis and chelation ion exchange properties of 2, 4-dihydroxyacetophenone-biuret-formaldehyde terpolymer resin
Authors: Rahangdale, S S
Gurnule, W B
Zade, A B
Keywords: Ion exchange
Polymer resins
Distribution ratio
Issue Date: Apr-2009
Publisher: CSIR
Series/Report no.: Int. Cl.<sup>8 </sup>B01J 39/00
Abstract: The terpolymer resin 2, 4-dihydroxyacetophenone-biuret-formaldehyde has been synthesized by the condensation of 2, 4-dihydroxyacetophenone and biuret with formaldehyde in 2:1:3 molar ratios in presence of 2<i style="">M</i> hydrochloric acid as catalyst. UV-visible, IR and proton NMR spectral studies have been carried out to elucidate the structure of the resin. The terpolymer has proved to be a selective chelating ion exchange polymer for some metals. Chelating ion exchange properties of this polymer have been studied for Fe<sup>3+</sup>, Cu<sup>2+</sup>, Ni<sup>2+</sup>, Co<sup>2+</sup>, Zn<sup>2+</sup>, Cd<sup>2+ </sup>and Pb<sup>2+</sup> ions. Batch equilibrium method has been employed to study the selectivity of metal ion uptake and distribution coefficient over a wide <i style="">p</i>H range and in media of varying ionic strengths. The polymer shows higher selectivity for Fe<sup>3+ </sup>and Cu<sup>2+</sup> ions than for Ni<sup>2+</sup>, Co<sup>2+</sup>, Zn<sup>2+</sup>, Cd<sup>2+</sup> and Pb<sup>2+</sup> ions. Study of distribution ratio as a function of <i style="">p</i>H indicates that the amount of metal ion uptake by resin increases with the increasing <i style="">p</i>H of the medium.
Description: 531-535
ISSN: 0376-4710
Appears in Collections:IJC-A Vol.48A(04) [April 2009]

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