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Journal of Applied Sciences

Year: 2006 | Volume: 6 | Issue: 11 | Page No.: 2368-2376
DOI: 10.3923/jas.2006.2368.2376
Adsorption Isotherms of Pb (II), Ni (II) and Cd (II) Ions onto PES
J.A. Otun, I.A. Oke, N.O. Olarinoye, D.B. Adie and C.A Okuofu

Abstract: This study reports on removal of selected metal ions (lead, nickel and cadmium) from aqueous solution by adsorption. Powdered egg shell of particle size 63 μm was used as an adsorbent to remove each metal ion from individual, multi-component systems and from natural water in a batch process. The study revealed that adsorption capacities for lead ions on Powdered Eggshell (PES) were in the 76.2-99.4% range and for nickel and cadmium ions in the 15.0-68.4 and 24-40% ranges, respectively for mono-components synthetic waste waters and dropped to 62.7-90, 11.1-62.3 and 10.7-36.8% for Pb2+, Ni2+ and Cd2+, respectively when used for multi-component systems (natural water and synthetic wastewater). Adsorption capacity analysis shows that adsorption of Pb2+ fitted well into Langmuir isotherm for mono-synthetic wastewater, Freundlich isotherm for multi-component synthetic wastewater; Langmuir and Redlich-Peterson isotherms for natural water. Cd2+ and Ni2+ ions removal fitted well into Freundlich isotherm, Langmuir isotherm and Langmuir and Redlich-Peterson isotherms for mono component synthetic wastewater, multi component synthetic wastewater and natural water, respectively. The study also revealed that adsorption capacity of the metal ions is a function of adsorption dose and PES is a valuable adsorbent that needs to be used.

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How to cite this article
J.A. Otun, I.A. Oke, N.O. Olarinoye, D.B. Adie and C.A Okuofu, 2006. Adsorption Isotherms of Pb (II), Ni (II) and Cd (II) Ions onto PES. Journal of Applied Sciences, 6: 2368-2376.

Keywords: synthetic wastewaters, heavy metal ions removal, PES, Adsorption isotherms, natural water, isotherms and parameters

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