Abstract
Abstract A new inorganic ion exchanger, stannic selenopyrophosphate, was synthesized. Its chemical composition, ion-exchange capacity, thermal and chemical stabilities, pH titration curve, and distribution coefficients of 36 metal ions were studied systematically. It is a stable polyfunctional cation exchanger with a high ion-exchange capacity (2.29 meq/g for K+). It has a high affinity for Ag(I), Pb(II), Ba(II), Bi(III), and Zr(IV). Its structure was studied by IR, Raman, and x-ray diffraction analyses. A chemical formula ([(15SnO · 8OH) · 10H2P2O7 · 2HseO3]n · 5nH2O) for stannic selenopyrophosphate is proposed.
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