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