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Equilibrium and Kinetic Studies on removal of Cd(II) from Aqueous Solutions by Sulphuric Acid Activated Sesamum Indicum Carbon

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Author Affiliations

  • 1Department of Chemistry, Government College of Engineering, Salem-636 011, Tamil Nadu, INDIA
  • 2Department of Chemistry, Muthayammal College of Engineering, Rasipuram-637 408, INDIA
  • 3Research and Development Centre, JSW Steel (P) Ltd, Salem – 636 453, INDIA
  • 4 Department of Chemistry, Gnanamani College of Technology, Pachal, Namakkal, Tamil Nadu, INDIA

Res.J.chem.sci., Volume 4, Issue (3), Pages 36-44, March,18 (2014)

Abstract

Activated carbon prepared from oil cake of Sesamum Indicum by sulphuric acid treatment was used as adsorbent for the removal of Cd(II) ions from aqueous solutions. Various parameters as a function of contact time, initial pH, initial adsorbent dosage and metal ion concentrations were studied. The equilibrium adsorption data were fitted to Langmuir and Freundlich adsorption isotherm models. The equilibrium adsorption isotherms confirmed that activated carbon has high affinity and sorption capacity for Cd(II) with monolayer sorption capacities of 35.32 mg/g. The kinetic study indicated that the pseudo-second order rate equation better described the adsorption process. The adsorbents were also tested for the removal of cadmium (II) from synthetic electroplating wastewater. The results indicated that the prepared activated carbon is an efficient (99.9%), alternative low-cost adsorbent for the removal of cadmium(II) from aqueous solutions.

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