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Polish Journal of Chemical Technology

The Journal of West Pomeranian University of Technology, Szczecin

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Volume 13, Issue 4 (Jan 2011)


Kinetic, Equilibrium and Thermodynamic studies on the removal of Cr(VI) by activated carbon prepared from Cajanus Cajan(L) Milsp seed shell

P. Thamilarasu / G. Kumar
  • Department of Chemistry, Anna university of Technology, Tiruchirappalli (Pattukottai Campus) -614 701, India
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ R. Tamilarasan
  • Department of Chemistry, Anna university of Technology, Tiruchirappalli (Pattukottai Campus) -614 701, India
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ V. Sivakumar / K. Karunakaran
Published Online: 2012-01-02 | DOI: https://doi.org/10.2478/v10026-011-0041-6

Kinetic, Equilibrium and Thermodynamic studies on the removal of Cr(VI) by activated carbon prepared from Cajanus Cajan(L) Milsp seed shell

This paper presents the feasibility of the removal of hexavalent chromium ions from aqueous solutions by using activated carbon prepared from Cajanus Cajan(L) Milsp. It was carbonized and activated by treating it with concentrated sulfuric acid followed by heating for 5 h at 500°C. Batch adsorption experiments were carried out as a function of pH, contact time, initial concentration of the adsorbate, adsorbent dosage and temperature. The experimental data fitted well to the Freundlich isotherm. The thermodynamic parameters such as ΔH°, ΔS°, and ΔG° were calculated, which indicated that the adsorption was spontaneous and endothermic in nature. The adsorbent used in this study was characterized by FT-IR and SEM before and after the adsorption of metal ions. The results indicate that Cajanus Cajan(L) Milsp can be employed as a low cost alternative and commercial adsorbents in the removal of chromium (VI) from water and waste water.

Keywords: Adsorption; isotherm; activated carbon; chromium and seed shell

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About the article

Published Online: 2012-01-02

Published in Print: 2011-01-01

Citation Information: Polish Journal of Chemical Technology, ISSN (Online) 1899-4741, ISSN (Print) 1509-8117, DOI: https://doi.org/10.2478/v10026-011-0041-6.

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