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Cu and Zn Ions Adsorption Properties at Various pH with a Synthetic Zeolite

합성 제올라이트를 이용한 pH에 따른 Cu와 Zn 이온의 흡착특성

Lee, Chang-Han
이창한

  • Received : 2012.03.19
  • Accepted : 2012.06.02
  • Published : 2012.07.31

Abstract

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 $1^{st}$ and $2^{nd}$ order model and Langmuir and Freundlich model. Analysis of adsorption kinetics data revealed that the pseudo $2^{nd}$ order kinetics mechanism was predominant. The equilibrium data in pH 3 - 5 were able to be fitted well to a Langmuir model, by which the maximum adsorption capacities($q_{max}$) were determined at 124.9 - 140.1 mg $Cu^{2+}/g$ and 153.2 - 166.9 mg $Zn^{2+}/g$, respectively. We found that Z-C1 has a potential application as absorbents in metal ion recovery with low pH.

Keywords

Coal Fly ash;Zeolite;Copper;Zinc;Adsorption;Kinetics;Isotherm

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Acknowledgement

Supported by : 부산가톨릭대학교