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A Study on Removal of Cadmium(II) from Aqueous solutions by Adsorption on Red Mud

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Author Affiliations

  • 1 Department of Chemistry, K. Govt. Arts and Sc. College Raigarh, CG, INDIA
  • 2 Department of Chemistry, Kirodimal Institute of Technology, Raigarh, CG, INDIA
  • 3 Department of Chemistry, Dr. C.V. Raman University, Bilaspur, CG, INDIA

Res.J.chem.sci., Volume 4, Issue (4), Pages 44-53, April,18 (2014)

Abstract

The present study aims to evaluate the removal characteristics of red mud as adsorbent to remove Cd(II) ion from aqueous solutions by batch experiments under various experimental conditions. Freundlich and Langmuir adsorption isotherm models have been used to discuss the data obtained. Lagergren first-order equation, pseudo-second-order equation and intra-particle diffusion models have been used to discuss the kinetics. To have an idea about spontaneity and feasibility of the adsorption process, thermodynamic parameters such as change in free energy G, change in enthalpy H and change in entropy S have been evaluated and discussed.

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