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KMID : 1024520120210070805
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Journal of the Environmental Sciences
2012 Volume.21 No. 7 p.805 ~ p.813
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Cu and Zn Ions Adsorption Properties at Various pH with a Synthetic Zeolite
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Lee Chang-Han
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Abstract
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The removal property of Cu and Zn ions by chemical precipitation and adsorption using zeolite(Z-C1) prepared from
coal fly ash(CFA) were evaluated in this study. Adsorption kinetic and equilibrium mechanisms described to analyze
parameters and correlation factors with Lagergen 1st and 2nd order model and Langmuir and Freundlich model. Analysis of adsorption kinetics data revealed that the pseudo 2nd order kinetics mechanism was predominant. The equilibrium data in pH3 - 5 were able to be fitted well to a Langmuir model, by which the maximum adsorption capacities(qmax) were determined at 124.9 - 140.1 mg Cu2+/g and 153.2 - 166.9 mg Zn2+/g, respectively. We found that Z-C1 has a potential application as absorbents in metal ion recovery with low pH.
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KEYWORD
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Coal Fly ash, Zeolite, Copper, Zinc, Adsorption, Kinetics, Isotherm
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