Rette, Negussie (PhD)Sisay , Tezera2018-07-192023-11-092018-07-192023-11-091980-06http://etd.aau.edu.et/handle/12345678/9451The synthesis of zirconium selenite and thorium tellurite are reported. Zirconium selenite has been prepared by mixing 4 N HCl solution of zirconium oxychloride with 4 N HCl solution of sodium selenite, and by adjusting the acidity of the solution to about 1 M HC1. Thorium tellurite has been prepared by mixing 1 M HN03 solution of thorium nitrate with 4 N HCl solution of sodium tellurite. and by adjusting the acidity of the solution to about 1 M HC1. The chemical composition for both exchangers showed metal to anion Zr:Se and Th:Te ratio of 1:2. The IR spectrum of both exchangers revealed absorption bands in the region 3500-3000 cm- 1 due to water molecules and OH groups, and 1700-1600 cm -1 • which may be due to interestitial water. The hydrogen ion liberation capacity of zirconium selenite and thorium tellurite was found to be 1.2 meq/g and 1.12 meq/g respectively. Distribution coefficients of metal ions on both exchangers were determined at different pH in the range 2-6.5. The distribution coefficients were higher for Pb. Co and Cu than for other metal ions. On the basis of distribution coefficients, separations of Pb2+ from Cu2+, 2+ 2+ 2+ 2+ 2+ Cd • Zn • Co • Mn • and Ni have been achieved on both exchangers. A number of binary and ternary separatione of metal ions have been achieved on the columns of both exchangers.enSelenite and TelluriteThesis