Cognizurecreating knowledge for future

Composite materials formed by the combination of multivalent metal acid salts and organic polymers (polyaniline, polypyrrole, polythiophene, polyacrylamide etc.), provides a new class of ‘organic–inorganic’ hybrid ion exchangers with better mechanical and granulometric properties, good ion-exchange capacity, higher chemical and radiation stabilities, reproducibility and selectivity for heavy metals. This material was characterized using X-ray (XRD and XRF), IR, TGA-DTA and total elemental analysis studies. On the basis of distribution studies, the material has been found to be highly selective for Pb(II). Thermodynamic parameters (i.e. ΔG^o, ΔS^o and ΔH^o) have also been calculated for the adsorption of Pb²⁺, Cs⁺, Fe³⁺, Cd²⁺, Cu⁺², Zn²⁺, Co²⁺ and Eu³⁺ ions on polyacrylamide Sn(IV) molybdophosphate showing that the overall adsorption process is spontaneous and endothermic.