Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

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Original Articles: 2012 Vol: 4 Issue: 6

Thermodynamics of adsorption of Pb (II) and Cd (II) metal ions from aqueous solution by Punica granatum L. husk


Temperature effects on adsorption of Pb (II) and Cd (II) onto Punica granatum L. husk for optimized predetermined conditions has been studied by batch adsorption experiment for different contact time between adsorbate and adsorbent. The adsorption was found to increase with rise in temperature. Thermodynamic functions like equilibrium constant (K), free energy (∆G 0 ), entropy (∆S 0 ) and enthalpy (∆H 0 ) for adsorption were estimated. The adsorption process was found to be endothermic with increase of randomness at solid-liquid interface.

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