Indian Journal of Science and Technology
Year: 2009, Volume: 2, Issue: 2, Pages: 63-66
P. Panneerselvam1 , V. Sathya Selva Bala1 , K. V. Thiruvengadaravi2 , J. Nandagopal2 , M. Palanichamy3 and S. Sivanesan1#
1Environmental Management Lab., Dept. of Chemical Engg., Anna University, Chennai 600 025.
2Department of Chemistry, Velammal Engineering College, Chennai-66. India.
3Department of Chemistry, Anna University, Chennai-25, India.
*Author for the correspondence:
Environmental Management Lab., Dept. of Chemical Engg.,
Anna University, Chennai 600 025
An attempt was made to modify zeolite so as to find use as ion-exchange material for the removal of copper ion from industrial wastewaters. Large pore Hβ zeolite was initially modified with phosphoric acid and further treated with aqueous NaHCO3 solution to obtain the PNa2-β. The prepared PNa2- β was characterized by XRD, BET Surface area, SEM and AAS techniques. The sorptive removal of copper ion from aqueous solutions using modified - β zeolites was investigated. The PNa2- β zeolite showed higher sorption capacity than Na- β zeolite. It is because of the exchangeable Na+ ions being doubled in the PNa2- β compared to the Na- β zeolite. Equilibrium data were fitted to linear Langmuir and Freundlich models while the kinetic data were represented by pseudo-first order and pseudosecond order kinetic models.
Keywords: Metal removal, modified zeolites, ion exchange, kinetics, isotherms
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