Synthesis and Characterization of Composite Cation Exchanger Tin(IV) Boratophosphate and Comparison of Ion-Exchange Properties

Abstract

Organic–inorganic composites have exhibited unexpected new properties and have received attention by many scholars. The research on acrylamide Tin­(IV) boratophosphate (ATBP) is introduced in this paper. The influence of reactant concentration, mixing ratio, pH, and other experimental parameters on the properties of the ATBP was elucidated, determining which exhibits the best ion exchange capacity (IEC) of 1.4 mequiv/g, and the physical and chemical properties of the ATBP were characterized by TGA, FTIR, XRD, SEM, and EDS. Furthermore, the elution concentration, elution performance, and thermal stability of ATBP were also studied. It was amazing to find that the distribution coefficient of ATBP was 337 mL g–1 for Fe3+. And the adsorption mechanism of ATBP was also studied from the thermodynamics, kinetics, and adsorption isotherm. The ATBP cation exchanger has a good application prospect in the removal of Fe3+ from acid polluted water.