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Adsorption Characteristics of Ni2+, Zn2+ and Cr3+ by Zeolite Synthesized from Jeju Scoria

제주 스코리아로부터 합성한 제올라이트에 의한 Ni2+, Zn2+ 및 Cr3+의 흡착 특성

  • Kim, Jung-Tae (Jeju Livestock Research Center) ;
  • Lee, Chang-Han (Department of Environmental Administration, Catholic University of Pusan) ;
  • Kam, Sang-Kyu (Department of Environmental Engineering, Jeju National University)
  • 김정태 (제주축협 축산물공판장) ;
  • 이창한 (부산가톨릭대학교 환경행정학과) ;
  • 감상규 (제주대학교 환경공학과)
  • Received : 2020.04.22
  • Accepted : 2020.07.14
  • Published : 2020.07.31

Abstract

The characteristics of heavy metal ion (Ni2+, Zn2+, and Cr3+) adsorption by zeolite synthesized from Jeju scoria using the fusion and hydrothermal method, were studied. The synthetic zeolite was identified as a Na-A zeolite by X-ray diffraction analysis and scanning electron microscopy images. The equilibrium of heavy metal ion adsorption by synthetic zeolite was reached within 60 min for Ni2+ and Zn2+, and 90 min for Cr3+. The uptake of heavy metal ions increased with increasing pH in the range of pH 3-6 and the uptake decreased in the order of Cr3+ > Zn2+ > Ni2+. For initial heavy metal concentrations of 20-250 mg/L at nonadjusted pH, the adsoption of heavy metal ions was well described by the pseudo second-order kinetic model and was well fitted by the Langmuir isotherm model. The maximum uptake of heavy metal ions obtained from the Langmuir model, decreased in the order of Zn2+ > Ni2+ > Cr3+, differing from the effect of pH on the uptake, which was mainly based on the different pH of the solutions.

Keywords

References

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