African Journal of
Pure and Applied Chemistry

  • Abbreviation: Afr. J. Pure Appl. Chem.
  • Language: English
  • ISSN: 1996-0840
  • DOI: 10.5897/AJPAC
  • Start Year: 2007
  • Published Articles: 368

Full Length Research Paper

Modelling of the adsorption of zn2+ from aqueous solution by modified and unmodified tiger nut shell

Nnabuk O.  Eddy1* and Stevens A. Odoemelam2
1Department of Chemistry, Ahmadu Bello University, Samaru Campus, Zaria, Kaduna State, Nigeria 2Department of Chemistry, Michael Okpara University of Agriculture, Umudike, Abia State, Nigeria.
Email: [email protected]

  •  Accepted: 30 June 2009
  •  Published: 31 August 2009

Abstract

Adsorption of Zn (II) ions from aqueous solutions was studied in a batch system using Tiger nut shells. The optimum condition for the adsorption of Zn (II) ions from aqueous solution by these shells was investigated by considering the extent of adsorption with respect to contact time, initial metal ion concentration, particle size of the adsorbent and modification of the adsorbent with H2SO4. The extent of metal ions removed decreased with increasing contact time but increased with increase in the initial metal ion concentration. The adsorption equilibrium data were best described by Langmuir adsorption isotherm.  Although intraparticle diffusion was not the rate determining step for the adsorption of Zn (II) ions from aqueous solution by tiger nut shell, the adsorption kinetic was consistent with Weber-Morris and Lagergren pseudo second order models.

 

Key words: Adsorption, Zn (II), tiger nut shell, kinetics.

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This article is published under the terms of the Creative Commons Attribution License 4.0

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