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Adsorption Characteristics of Cobalt Ion with Zeolite Synthesized by Coal Fly Ash  

Lee, Chang-Han (Department of Environmental Engineering, Catholic University of Pusan)
Suh, Jung-Ho (Department of Environmental Life Chemistry, Ulsan College)
Publication Information
Journal of Korean Society of Environmental Engineers / v.31, no.11, 2009 , pp. 941-946 More about this Journal
Abstract
Two types of synthetic zeolites, commercially used (Z-WK) and synthesized by coal fly ash (Z-C1), and raw coal fly ash(F-C1) were examined for its kinetics and adsorption capacities of cobalt. Experimental data are fitted with kinetic models, Lagergen $1^{st}$ and $2^{nd}$ order models, and four types of adsorption isotherm models, Langmuir, Freundlich, Redlich-Peterson, and Koble-Corrigan. Synthesized zeolite (Z-C1) which had 1.51 of Si/Al ratio was synthesized by raw coal fly ash from a thermal power plant. Adsorption capacities with three types of adsorbents, Z-WK, Z-C1, and F-C1, were in the order of Z-C1 (94.15 mg/g) > F-C1 (92.94 mg/g) > Z-WK (88.56mg/g). The adsorption kinetics of Z-WK and Z-C1 with cobalt could be accurately described by a pseudo-second-order rate equation. The adsorption isotherms of Z-WK and Z-C1 with cobalt were well fitted by the Langmuir and Redlich-Peterson equation. Z-C1 will be used to remove cobalt in water as a more efficient absorbent.
Keywords
Adsorption; Synthetic zeolite; Coal; Fly ash; Kinetic model; Equilibrium model;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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