Journal of Korea Society of Waste Management (한국폐기물자원순환학회지)

Korea Society of Waste Management (한국폐기물자원순환학회)
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Adsorption Characteristics of Zinc Ion in Synthetic Wastewater by Carbonaceous Material Prepared from Oriental Cherry

벚나무 탄화물을 이용한 합성폐수 내 아연 이온의 흡착 특성

  • Bae, Woo-Bin (Department of Environmental Engineering, Kangwon National University) ;
  • Park, Ga-Ram (Department of Environmental Engineering, Kangwon National University) ;
  • Jung, Da-Yoon (Department of Environmental Engineering, Kangwon National University) ;
  • Ahn, Johng-Hwa (Department of Environmental Engineering, Kangwon National University)
  • Received : 2017.12.07
  • Accepted : 2018.03.22
  • Published : 2018.04.30
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Abstract

Carbonaceous material prepared from oriental cherry can be used for the adsorption of zinc ion from an aqueous solution. Parameters such as pH (4-11), temperature (293-333 K), mixing intensity (10-120 rpm) and contact time (0.5-90 min) were studied. Increasing pH (99.6% at pH 11) and temperature (99.8% at 333 K) caused an increase in adsorption capacity. A pseudo-equilibrium state was reached within 1 min of contact time. Removal efficiency of zinc ion remained constant regardless of mixing intensity. The adsorption equilibrium data were best represented by the Freundlich adsorption isotherm. The calculated maximum adsorption capacity was 3.541 mg/g. Thermodynamic studies demonstrated that the adsorption process was spontaneous with Gibb's free-energy values ranging between -3.272 and -15.594 kJ/mol and endothermic with an enthalpy value of 86.984 kJ/mol. Therefore, carbonaceous material from oriental cherry was shown to have good potential for the adsorption of zinc ion.

Keywords

Acknowledgement

Supported by : 한국연구재단

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