Notice of RetractionCapacity of Modified Fly Ash in Advanced Treatment of Landfill Leachate: Determined of Equilibrium and Kinetic Model Parameters

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

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The purpose of this study was to investigate the possibility for utilization of coal fly ash treated with initiator C as a low cost adsorbent material for the advanced treatment of landfill leachate. Batch experiments were conducted to determine the effect of fly ash dosage and initial pH on adsorption of COD. Experimental adsorption equilibriums were measured and the adsorption kinetic measurements were carried out. For all the reaction temperature, the isothermal data could be described by the Freundlich adsorption model. The Kinetic measurements confirmed that the adsorption of COD from landfill leachate could be described by a model involving pseudo-second-order reactions. The change of entropy (ΔS°) and enthalpy (ΔH°) of the process were estimated as -112.7J/mol and -43.11kJ/mol, respectively. The negative value of the change in Gibbs standard free energy (ΔG°) confirmed the feasibility of the process and the spontaneous adsorption of COD on the adsorbent. The negative value of activation energy (E_a) showed that the adsorption rate decreased when the temperature increased.