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Modeling of the Nitrate Adsorption Kinetics onto $ZnCl_2$ Treated Granular Activated Carbon  

Ji, Min-Kyu (Department of Environmental Engineering, Yonsei University)
Jung, Woo-Sik (Department of Environmental Engineering, Yonsei University)
Bhatnagar, Amit (Department of Environmental Engineering, Yonsei University)
Jeon, Byong-Hun (Department of Environmental Engineering, Yonsei University)
Publication Information
Journal of Soil and Groundwater Environment / v.13, no.3, 2008 , pp. 21-26 More about this Journal
Abstract
Nitrate adsorption from aqueous solutions onto zinc chloride ($ZnCl_2$) treated coconut Granular Activated Carbon (GAC) was studied in a batch mode at two different initial nitrate concentrations (25 and 50 mg/L). The rate of nitrate uptake on prepared media was fast in the beginning, and 50% of adsorption was occurred within 10 min. The adsorption equilibrium was achieved within one hour. The mechanism of adsorption of nitrate on $ZnCl_2$ treated coconut GAC was investigated using four simplified kinetic models : the rate parameters were calculated for each model. The kinetic analysis indicated that pseudo-second-order kinetic with pore-diffusion-controlled was the best correlation of the experimental kinetic data in the present adsorption study.
Keywords
Nitrate pollution; Adsorption; $ZnCl_2$ treated activated carbon; Kinetic modeling;
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Times Cited By KSCI : 2  (Citation Analysis)
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