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Journal of Applied Sciences

Year: 2007 | Volume: 7 | Issue: 16 | Page No.: 2307-2313
DOI: 10.3923/jas.2007.2307.2313
Sorption of Heavy Metals from Elecroplating Effluents by Low-Cost Adsorbents II: Use of Waste Tea, Coconut Shell and Coconut Husk
K.O. Olayinka, B.I. Alo and T. Adu

Abstract: Present research focuses on the use of waste tea, coconut shell and coconut husk as potential low-cost adsorbents for removal of heavy metals chromium (Cr), zinc (Zn) and nickel (Ni)) from three different electroplating plant effluents. The traditional activated carbon was also compared for objective assessment of the efficiency of the low cost adsorbents. The adsorbents were used in batch tests with electroplating effluents, its metal binding capacity, pH dependence of metal uptake and kinetics of metal adsorption were investigated. The study showed most of the metal uptake was within the first 60 min of exposure for all the adsorbents. Cr (VI) was optimally bound to the adsorbents at pH 3-4 and Zn(II) and Ni(II) at pH 7-9. The metal binding capacity differed for the adsorbents. Coconut shell was more effective for Ni ( 97.36% removal). All the three showed high rate of adsorption Zn (coconut shell, 99.74%, coconut husk 99.76% and waste tea 90.74% removal). All three satisfied the Freundlich Adsorption Isotherm.

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How to cite this article
K.O. Olayinka, B.I. Alo and T. Adu, 2007. Sorption of Heavy Metals from Elecroplating Effluents by Low-Cost Adsorbents II: Use of Waste Tea, Coconut Shell and Coconut Husk. Journal of Applied Sciences, 7: 2307-2313.

Keywords: electroplating effluent, coconut shell, coconut husk, Adsorption and heavy metals

REFERENCES
  • APHA, 2001. Standard Methods for the Examination of Water and Wastewater. 15th Edn., Byrd Prepress, Washington, DC

  • Blais, J., C. Ben, J. Fiset and Tyag, 2000. Review on metal removal from effluents by adsorption on sawdust and wood bark. Rev. Sci. Eau., 13: 325-349.

  • Carrilho, E.N. and T.M. Gilbert, 2000. Assessing metal sorption on the marine alga Pilayella littoralis. J. Environ. Monit., 2: 410-415.
    PubMed    Direct Link    

  • Chand, S., V.K. Agarwal and P. Kumar, 1994. Removal of hexavalent chromium from wastewater by adsorption. Indian J. Environ. Health, 36: 151-158.
    Direct Link    

  • Forstner, U. and G.T.W. Wittmann, 1983. Metal Pollution in the Aquatic Environment. 2nd Edn., Springer-Verlag, Berlin, Germany, pp: 4-68

  • Bishnoi, N.R., M. Bajaj, N. Sharma and A. Gupta, 2004. Adsorption of Cr (VI) on activated rice husk carbon and activated alumina. Bioresour. Technol., 91: 305-307.
    Direct Link    

  • Nomanbhay, S.M. and K. Palanisamy, 2005. Removal of heavy metal from industrial wastewater using chitosan coated oil palm shell charcoal. Electron. J. Biotechnol., 8: 43-53.
    CrossRef    Direct Link    

  • Olayinka, K.O., B.I. Alo and T. Adu, 2005. Sorption of heavy metals from electroplating effluents by low cost adsorbents. I: Use of sawdust and Teak tree bark. J. Nig. Environ. Soc., 2: 330-336.

  • Rao, M., A.V. Parwate and A.G. Bhole, 2002. Removal of Cr6+ and Ni2+ from aqueous solution using bagasse and fly ash. Waste Manage., 22: 821-830.
    CrossRef    Direct Link    

  • Saravanne, R. and T. Sundarajan, 2002. Efficiency of chemical modified low cost adsorbents for removal of heavy metals from wastewater: A comparative study. Indian J. Environ. Health, 44: 78-87.
    Direct Link    

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