General Information
    • ISSN: 2010-0264
    • Frequency: Bimonthly (2010-2014); Monthly (Since 2015)
    • DOI: 10.18178/IJESD
    • Editor-in-Chief: Prof. Richard Haynes
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Editor-in-chief
The University of Queensland, Australia
It is my honor to be the editor-in-chief of IJESD. The journal publishes good papers in the field of environmental science and development.
IJESD 2014 Vol.5(2): 165-170 ISSN: 2010-0264
DOI: 10.7763/IJESD.2014.V5.471

Isotherm, Kinetic and Thermodynamic Studies on the Adsorption of Cd (II) and Zn (II) ions from Aqueous Solutions onto Bottom Ash

Hatairat Sukpreabprom, Orn-Anong Arquero, Wimol Naksata, Ponlayuth Sooksamiti, and Sorapong Janhom
Abstract—Bottom ash is a waste material obtained from electricity generation through combustion of coal at the Mae Moh power plant in Thailand. The adsorption of Cd (II) and Zn (II) ions from aqueous solutions onto bottom ash was studied using batch experiments. The effect of pH, contact time and temperature were investigated. Adsorption isotherm data for metal ions was analyzed by the Langmuir and Freundlich isotherms. The Freundlich isotherm properly described the adsorption data for all studied temperatures. The results revealed that the adsorption kinetics followed pseudo-second-order kinetic model. Thermodynamic parameters such as Gibbs free energy change (ΔG°), enthalpy change (ΔH°) and entropy change (ΔS°) were investigated. The calculated values showed that the adsorption process for both Cd (II) and Zn (II) ions was endothermic.

Index Terms—Bottom ash, adsorption, isotherm, kinetic, thermodynamic.

Hatairat Sukpreabprom, Orn-Anong Arquero, Wimol Naksata, and Sorapong Janhom are with the Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand (e-mail: hatairat278@gmail.com, orn.arquero@gmail.com, scchi021@chiangmai.ac.th, sorapongj@gmail.com).
Ponlayuth Sooksamiti is with the Department of Primary Industry and Mine Office Region 3, Chiang Mai, Thailand (e-mail: sooksamiti@hotmail.com).

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Cite:Hatairat Sukpreabprom, Orn-Anong Arquero, Wimol Naksata, Ponlayuth Sooksamiti, and Sorapong Janhom, "Isotherm, Kinetic and Thermodynamic Studies on the Adsorption of Cd (II) and Zn (II) ions from Aqueous Solutions onto Bottom Ash," International Journal of Environmental Science and Development vol. 5, no. 2, pp. 165-170, 2014.

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