Synthesis, Characterization and Application of  Zn/Al-CO3 ¬for the Removal of Lead Ions

N. Ayawei; A. K. Inengite; D. Wankasi; E. D. Dikio

doi:10.9734/ACSJ/2015/18202

Research Article Open access CC BY 4.0

Synthesis, Characterization and Application of Zn/Al-CO3 ¬for the Removal of Lead Ions

N. Ayawei, A. K. Inengite, D. Wankasi, E. D. Dikio

Chemical Science International Journal · pp. 213–226 · Published 14 May 2015

10.9734/ACSJ/2015/18202

Abstract

In the present work, Zn/Al layered double hydroxide of ratio 2:1 was synthesis by co-precipitation method from their nitrate salts and utilized as adsorbent for the removal of lead ions from aqueous solution. The synthesized Zn/Al-CO3 was characterized by SEM, XRD and FTIR. The effect of various parameters such as contact time, initial concentration and variable temperature were investigated. The results show that the adsorption process was depended on contact time rather than temperature and concentration. Studies of the essential thermodynamic parameters shows that the adsorption process was rapid, exothermic and spontaneous and also fitted both Langmuir and Freundlich isotherm. The results of various kinetic models are zero-order kinetics model R2 =1, second-order kinetic model R2 = 0.998 and pseudo-second order kinetics model R2 = 0.999.

Lead adsorption isosteric heat of adsorption activation energy layered double hydroxide kinetics adsorption isotherms

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N. Ayawei, A. K. Inengite, D. Wankasi, E. D. Dikio (2015). Synthesis, Characterization and Application of Zn/Al-CO3 ¬for the Removal of Lead Ions. Chemical Science International Journal , 213–226. https://doi.org/10.9734/ACSJ/2015/18202

Affiliations

N. Ayawei — Department of Chemical Sciences, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria
A. K. Inengite — Department of Chemical Sciences, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria
D. Wankasi — Department of Chemical Sciences, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria and Applied Chemistry and Nanoscience Laboratory, Department of Chemistry, Vaal University of Technology, P.O.Box X021, Vanderbijlpark, South Africa
E. D. Dikio — Department of Chemical Sciences, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria and Applied Chemistry and Nanoscience Laboratory, Department of Chemistry, Vaal University of Technology, P.O.Box X021, Vanderbijlpark, South Africa

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