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  Global Journal of Physical Chemistry. Volume 1, Issue 1 (2010) pp. 91-106
  Research Article
 
Synthesis, characterization and ion-exchange properties of a novel 'organic–inorganic' hybrid cation-exchanger: polyacrylamide Sn(IV) molybdophosphate
  I. M. El-Naggar a, E. A. Mowafy a, E. A. Abdel-Galil a*, M. F. El-Shahat b  
     
a Atomic Energy Authority, Hot Labs. Centre, P. No. 13759, Egypt
b Chemistry Department, Faculty of Science, Ain Shams University, Egypt

   
  Abstract  
 

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. ΔGo, ΔSo and ΔHo) 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.

     
  Keywords  
  Synthesis; characterization; distribution studies; polyacrylamide Sn(IV) molybdophosphate; heavy toxic metals; thermodynamic parameters  
     
   
   
   
   
     

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