International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2572

Full Length Research Paper

Chromium (III) sorption from aqueous solutions using activated carbon prepared from cashew nut shells

S. Tangjuank1*, N. Insuk1, V. Udeye2 and J. Tontrakoon3
1Program of Science, Faculty of Science and Technology, Uttaradit Rajabhat University, Uttaradit, 53000, Thailand. 2Department of Chemistry, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand. 3Department of Physics, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand.
Email: [email protected]

  •  Accepted: 25 June 2009
  •  Published: 31 August 2009

Abstract

Activated carbon prepared from cashew nut shells using potassium hydroxide activation at 850°C in N2 and CO2 atmosphere was used as an adsorbent for the removal of chromium ions from aqueous solutions. The adsorption of Cr(III) ions on activated carbon was studied. The effect of experimental parameters such as, pH of initial concentration of Cr(III) solutions, contact time, dosage of adsorbent and initial concentration of Cr(III) solutions was investigated. The Freundlich and Langmuir isotherm fitted well to data of Cr(III) adsorption. Cr(III) uptake capacity was 13.93 mg/g which was calculated from the Langmuir isotherm.

 

Key words: Activated carbon, cashew nut shell, trivalent chromium (Cr(III)), adsorption.

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