Synthetic, analytical and kinetic studies on a crystalline and thermally stable phase of antimony(V) arsenosilicate cation exchanger

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 1994-01, Vol.82 (1), p.37-48
• Main Authors: Varshney, K.G., Gupta, Alka, Singhal, K.C.
• Format: Article
• Language: English
• Subjects: Antimony(V) arsenosilicate; Cation exchanger; Chemistry; Exact sciences and technology; General and physical chemistry; Inorganic ion exchanger; Ion exchanger; Ion-exchange; Other ion exchangers: preparations and properties; Surface physical chemistry; Synthesis
• ISSN: 0927-7757; 1873-4359
• DOI: 10.1016/0927-7757(93)02591-2

A new, thermally stable and crystalline phase of antimony(V) arsenosilicate has been synthesized and characterized using X-ray, IR, TGA and DTA studies in addition to ion exchange studies such as determination of ion exchange capacity, elution, pH titration and distribution behaviour. On the basis of the distribution behaviour the material has been found to be highly selective for iron. Some binary separations of metal ions such as Sr(II)Cd(II) and Mn(II)Cd(II) have also been performed on a column of this material. The X-ray studies reveal the crystalline nature of the material, indicating a cubic structure. The kinetics of exchange for the metal ions has also been studied and some physical parameters such as the self-diffusion coefficient D 0, energy E a and entropy ΔS* of activation have been determined.