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Comparative study concerning the kinetic and thermodynamic description of some heavy metal ions sorption on fly ash

L.TOFAN1, C, PADURARU1, I. VOLF1, R. WENKERT2,*

Affiliation

  1. “Gh. Asachi” Technical University of Iasi – Romania
  2. Soroka University Medical Center, Beer-Sheva, Israel

Abstract

This study reveals the results of a kinetic and thermodynamic characterization of the sorption process of copper (II), zinc(II) and lead(II) ions from diluted aqueous solutions by energy pit coal fly ash, a massive by-product of a thermal power station in Iaşi, Romania. An evaluation of the kinetics of fly ash to trap Cu (II), Zn(II) and Pb(II) ions in aqueous solutions was carried in batch conditions using concentration and contact time as parameters. The thermodynamic parameters, free energy change, enthalpy change and entropy change were calculated on the basis of Langmuir constants. The obtained values indicate the feasibility, the spontaneity and the endothermic nature of the heavy metals retention by fly ash. The results of this work suggest that fly ash may be a promising sorbent provided for environmental technologies in the future..

Keywords

Kinetics, Thermodynamics, Sorption, Fly ash.

Submitted at: March 10, 2011
Accepted at: July 25, 2011

Citation

L.TOFAN, C, PADURARU, I. VOLF, R. WENKERT, Comparative study concerning the kinetic and thermodynamic description of some heavy metal ions sorption on fly ash, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 7, pp. 892-896 (2011)