Removal of Ni (II) from Aqueous Solution by Adsorption onto Activated Carbon Prepared from Lapsi (Choerospondias axillaris) Seed Stone

  • Rajeshwar M. Shrestha
  • Margit Varga
  • Imre Varga
  • Amar P. Yadav
  • Bhadra P. Pokharel
  • Raja Ram Pradhananga
Keywords: Adsorption, Lapsi seed stones, Carbon, Adsorption isotherms, Nickel

Abstract

Activated carbons were prepared from Lapsi seed stone by the treatment with H2SO4 and HNO3 for the removal of Ni (II) ions from aqueous solution. Two activated carbon have been prepared from Lapsi seed stones by treating with conc.H2SO4 and a mixture of H2SO4 and HNO3 in the ratio of 1:1 by weight for removal of Ni(II) ions. Chemical characterization of the resultant activated carbons was studied by Fourier Transform Infrared Spectroscopy and Boehm titration which revealed the presence of oxygen containing surface functional groups like carboxyl, lactones and phenols in the carbons. The optimum pH for nickel adsorption is found to be 5. The adsorption data were better fitted with the Langmuir equations than Freundlich adsorption equation to describe the equilibrium isotherms. The maximum adsorption capacity of Ni (II) on the resultant activated carbons was 28.25.8 mg g-1 with H2SO4 and 69.49 mg g-1 with a mixture of H2SO4 and HNO3. The waste material used in the preparation of the activated carbons is inexpensive and readily available. Hence the carbons prepared from Lapsi seed stones can act as potential low cost adsorbents for the removal of Ni (II) from water.

DOI: http://dx.doi.org/10.3126/jie.v9i1.10680

Journal of the Institute of Engineering, Vol. 9, No. 1, pp. 166–174

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Author Biographies

Rajeshwar M. Shrestha
Department of Engineering Science and Humanities, Institute of Engineering, Central Campus, Pulchowk, Tribhuvan University
Margit Varga
Department of Analytical Chemistry, Eotvos Lorand University, Budapest
Imre Varga
Department of Analytical Chemistry, Eotvos Lorand University, Budapest
Amar P. Yadav
Central Department of Chemistry,Tribhuvan University
Bhadra P. Pokharel
Department of Engineering Science and Humanities, Institute of Engineering, Central Campus, Pulchowk, Tribhuvan University,
Raja Ram Pradhananga
Central Department of Chemistry,Tribhuvan University
Published
2014-06-30
How to Cite
Shrestha, R., Varga, M., Varga, I., Yadav, A., Pokharel, B., & Pradhananga, R. (2014). Removal of Ni (II) from Aqueous Solution by Adsorption onto Activated Carbon Prepared from Lapsi (Choerospondias axillaris) Seed Stone. Journal of the Institute of Engineering, 9(1), 166-174. https://doi.org/10.3126/jie.v9i1.10680
Section
Articles