Preparation, characterization and kinetics of ion exchange studies of Ni2+ selective polyaniline-Zr(IV)molybdophosphate nanocomposite cation exchanger

Polyaniline-Zr(IV)molybdophosphate (PAZMP) was synthesized by sol-gel mixing of polyaniline (PANI) into the inorganic precipitate Zr(IV)molybdophosphate (ZMP). The physico-chemical properties of the material were characterized by using XRD, TGA, FTIR, SEM and TEM. Distribution studies for various metal ions revealed that the composite is highly selective for Ni2+. Its selectivity was examined by achieving some important binary separations of metal cations which indicates its utility in environmental pollution control. Ion-exchange kinetics for few divalent metal ions was evaluated by particle diffusion-controlled ion-exchange phenomenon at different temperatures. Some physical parameters like D-0, E-a and Delta S-0 have been evaluated under favoring a particle diffusion-controlled mechanism. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.