Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Removal of Cobalt Ion in Aqueous Solution Using Zeolitic Materials Synthesized from Jeju Volcanic Rocks

제주 화산석으로 합성한 제올라이트 물질을 이용한 용액 중의 Co 이온 제거

  • Cho, Eunnim (Busan Metropolitan City Institute of Health & Environment) ;
  • Lee, Chang-Han (Department of Environmental Administration, Catholic University of Pusan) ;
  • Kim, Moon il (Department of Environmental Administration, Catholic University of Pusan)
  • 조은님 (부산광역시 보건환경연구원) ;
  • 이창한 (부산가톨릭대학교 환경행정학과) ;
  • 김문일 (부산가톨릭대학교 환경행정학과)
  • Received : 2021.07.08
  • Accepted : 2021.09.12
  • Published : 2021.09.30
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Abstract

In this study, zeolitic materials were synthesized from Jeju Volcanic Rocks (JVR) using a fusion/hydrothermal method at NaOH/JVR ratios of 0.6 and 1.2. The crystallinities of the zeolitic materials at NaOH/JVR ratios of 0.6 and 1.2 were 25.5% and 59.0%, respectively. It was confirmed through the SEM image that the zeolitic materials covered the zeolite particle with a cube-shaped crystals. The Co ions adsorption by the zeolitic materials were to reach the adsorption equilibrium at 120 min. It could be better simulated in the pseudo-second order adsorption kinetic equation than in the pseudo-first order adsorption kinetic equation. The adsorption capacities (qm) of Co ions could be to estimate Langmuir isotherm better than Freundlich isotherm. The maximum adsorption capacities (qm) at NaOH/JVR ratios of 0.6 and 1.2 were 55.3 mg/g and 68.7 mg/g, respectively. It was found that there was a high correlation between the crystallinity of zeolitic materials and the adsorption capacity of Co ions adsorption.

Keywords

References

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