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International Journal of Chemical Technology
  Year: 2012 | Volume: 4 | Issue: 1 | Page No.: 1-16
DOI: 10.3923/ijct.2012.1.16
 
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Isothermal and Kinetic Studies of Simultaneous Removal of Mn (II) and Pb (II) Ions in Aqueous Solution by Adsorption onto Clay from Bikougou Deposit (Gabon)

F. Eba, J. Ndong Nlo, Z.H. Moussambi Membetsi, J.A. Ondo, R. Kouya Biboutou and P. Edou Engonga

Abstract:
This work aimed to evaluate the potential of the clay from Bikougou to adsorb simultaneously Mn (II) and Pb (II) from binary aqueous solutions. The experiments were realized by using batch technique at the temperature of 308 K and pH 4 with adsorption isotherms and the interaction of adsorbent-adsorbate time as parameters. Adsorption isotherm models of Freundlich, Langmuir and Dubinin-Kaganer-Radushkevich are all appropriate to describe the experimental adsorption results with their correlation coefficients above 0.95. The maximum amount of Mn (II) and Pb (II) ions adsorbed simultaneously is 85.379 mg g-1 and was obtained by applying the model of Dubinin-Kaganer-Radushkevich. The Mn (II) ions are preferentially adsorbed at multilayer available Freundlich surface sites and Pb (II) ions on the available adsorption sites on monolayer Langmuir homogeneous surface. The Pb (II) and Mn (II) mean adsorption energies are indicative of chemical and physical processes. In the bi-solute of Mn(II)-Pb(II) system, Pb(II) adsorption is promoted during its competition with Mn(II) for the adsorption sites. Mn(II) and Pb(II) ions compete for the attainment of adsorption sites following the kinetics of pseudo-second order with correlation coefficients greater than 0.99. All these results have shown the efficiency of clay adsorbent for the simultaneous removal of Pb (II) and Mn (II) from aqueous solution.
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How to cite this article:

F. Eba, J. Ndong Nlo, Z.H. Moussambi Membetsi, J.A. Ondo, R. Kouya Biboutou and P. Edou Engonga, 2012. Isothermal and Kinetic Studies of Simultaneous Removal of Mn (II) and Pb (II) Ions in Aqueous Solution by Adsorption onto Clay from Bikougou Deposit (Gabon). International Journal of Chemical Technology, 4: 1-16.

DOI: 10.3923/ijct.2012.1.16

URL: https://scialert.net/abstract/?doi=ijct.2012.1.16

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