Indian Journal of Science and Technology

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The Removal of Copper Ions from Aqueous Solution Using Phosphoric Acid Modified β- Zeolites


Affiliations
1 Environmental Management Lab., Dept. of Chemical Engg., Anna University, Chennai 600 025, India
2 Department of Chemistry, Velammal Engineering College, Chennai-66, India
3 Department of Chemistry, Anna University, Chennai-25, India
 

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
User

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  • The Removal of Copper Ions from Aqueous Solution Using Phosphoric Acid Modified β- Zeolites

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Authors

P. Panneerselvam
Environmental Management Lab., Dept. of Chemical Engg., Anna University, Chennai 600 025, India
V. Sathya Selva Bala
Environmental Management Lab., Dept. of Chemical Engg., Anna University, Chennai 600 025, India
K. V. Thiruvengadaravi
Department of Chemistry, Velammal Engineering College, Chennai-66, India
J. Nandagopal
Department of Chemistry, Velammal Engineering College, Chennai-66, India
M. Palanichamy
Department of Chemistry, Anna University, Chennai-25, India
S. Sivanesan
Department of Chemistry, Anna University, Chennai-25, India

Abstract


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

References





DOI: https://doi.org/10.17485/ijst%2F2009%2Fv2i2%2F29396