International Journal of Environmental Science and Development

Abstract—In the present investigation, fly ash received from Koradi Thermal Power Plant, India, is used as an adsorbent for the removal of Zn+2 ions from aqueous solution. The adsorption study were systematically carried out in a batch process using Atomic Absorption Spectroscopy (AAS) Technique, covering different process parameters such as amount of adsorbent, effect of contact time under constant stirring condition and steady state condition, and initial Zn+2 ions concentration. Removal tendency of Zn+2 ions from aqueous solution were also investigated using lime as an admixture along with the fly ash. It was found that use of lime as an admixture enhances the removal tendency of Zn+2 ions. The equilibrium data were processed using both Langmuir and Freundlich isotherm models. Finally, the kinetics of adsorption of Zn+2ions on fly ash particles were tested for different models. The results obtained in the present research work suggest that fly ash along with lime may be a promising adsorbent for Zn+2ions.

Index Terms—Adsorption isotherm, fly ash, pseudo firstorder reaction, zinc (II) ions.

A. K. Agarwal and M. S. Kadu are with the Department of Civil Engineering, Shri Ramdeobaba College of Engineering and Management, Nagpur, Maharastra, 440 013 India (e-mail: agarwal_rkn@ rediffmail.com; mahendra.kadu@rediffmail.com).
C. P. Pandhurnekar is with the Department of Applied Chemistry, Shri Ramdeobaba College of Engineering and Management, Nagpur, Maharastra, India (e-mail: chand2783@gmail.com).
I. L. Muthreja is with the Department of Mining Engineering, Visvesvaraya National Institute of Technology, Nagpur, Maharashtra, India (e-mail: muthreja2158@rediffmail.com).

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Cite: Ajay K. Agarwal, Mahendra S. Kadu, Chandrashekhar P. Pandhurnekar, and Ishwerdas L. Muthreja, "Kinetics and Adsorption Isotherm Study of Removal of Zn+2 ions from Aqueous Solution Using Thermal Power Plant Fly Ash," International Journal of Environmental Science and Development vol. 3, no. 4, pp. 376-381, 2012.