Synthesis, ion-exchange properties, and analytical applications of thermally stable tin(IV) vanadate

Abstract

Samples of stannic vanadate have been synthesized by varying the mixing ratio of the reagents and pH of the mixture. The most stable sample has been synthesized by mixing 0.25 M solutions of stannic chloride and sodium metavanadate in the ratio of 2:3 at pH 2.5. The material behaves as a weak cation exchanger. This sample has been critically studied for its ion-exchange, chemical, and thermal behaviour. The analytical utility of the material has been demonstrated by achieving some binary separations of metal ions on its column. Arsenate has also been quantitatively removed from a mixture of tungstate, phosphate, and antimonate.