화학공학소재연구정보센터
Indian Journal of Chemical Technology, Vol.13, No.2, 185-188, 2006
Synthesis and analytical application of Fe(III) based heteropoly acid cation exchangers
New inorganic ion exchangers based on Fc(III) namely ferric tungstomolybdate, ferric tungstosilicate, ferric tungstovanadate have been synthesized and characterized on the basis of chemical composition. ion exchange capacity, pH titrations, distribution coefficients, FTIR, TGA and thermal stabilities. The ion exchangers were found to be stable in 1.0 M mineral acids and 1.0 M metal chloride solutions. The formulae proposed for the exchangers are Fe2O3.2WO(3).2MoO(3).8H(2)O; Fe2O3.2WO(3).2SiO(2).9H(2)O and Fe2O3.2WO(3).V2O5- 10H(2)O respectively. Based on the difference in Kd values, some analytically important separations of metal ions have been achieved. The important mixtures analyzed are Al3+ - Mg2+, Co2+- Pb2+, Hg2+ - Ph2+, Ni2+ - Ph2+, Cd2+ - Pb2+ and Cu2+ Pb2+.