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Kinetic, Thermodynamic and Equilibrium Study on Removal of Lead(II) from Aqueous Solution Using Fly Ash

Author Affiliations

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

Int. Res. J. Environment Sci., Volume 3, Issue (2), Pages 83-92, February,22 (2014)

Abstract

Batch experiments have been carried out to evaluate the removal of lead(II) ion from aqueous solutions by using fly ash under various conditions of metal ion concentration, contact time, pH, temperature and particle size. The adsorption data have been discussed using Freundlich and Langmuir adsorption isotherm models. The kinetics of adsorption have been discussed using Lagergren equation, pseudo second-order rate equation and intra-particle diffusion models. Thermodynamic parameters such as change in Gibbs free energy G, change in enthalpy H, and change in entropy S have been evaluated. The adsorption process has been found to be spontaneous, feasible and endothermic in nature.

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