Removal of Fluoride from Aqueous Solution using Coconut Husk as Bio-Adsorbent

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IJEP 42(8): 984-989 : Vol. 42 Issue. 8 (August 2022)

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Abhishek Kumar, Anshuman Singh and Nityanand Singh Maurya*

National Institute of Technology, Department of Civil Engineering, Patna – 800 005, Bihar, India

Abstract

In the present study, fluoride removal from an aqueous solution was performed using coconut husk as an adsorbent. Parametric studies, namely batch isotherm and kinetics, the effect of pH and temperature were performed. Experimental isotherm data were analyzed using Langmuir, Freundlich and Dubinin-Radushkevich isotherm models. Dubinin-Radushkevich was found to be the best-fitted model (R2=0.92) in the present study. Adsorption kinetics indicated that adsorption equilibrium was reached within 75 min. The adsorption kinetics was also well described by the pseudo second order kinetics with R2=0.92. The optimum conditions of fluoride adsorption were found to be pH 7 and temperature 400C.

Keywords

Adsorption, Biomaterials, Groundwater, Defluoridation, Isotherm, kinetics

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