상하수도학회지 (Journal of Korean Society of Water and Wastewater)

  • 제32권5호
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  • Pages.399-409
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  • 2018
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  • 1225-7672(pISSN)
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  • 2287-822X(eISSN)
대한상하수도학회 (The Korean Society of Water and Wastewater)
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유기고분자로 표면 개질 된 입상활성탄을 이용한 프러시안 블루 고정화 및 Cs+ 제거

Covalent organic polymer grafted on granular activated carbon surface to immobilize Prussian blue for Cs+ removal

  • 서영교 (서울과학기술대학교 환경공학과) ;
  • 오대민 (한국건설기술연구원 환경플랜트연구소) ;
  • 황유훈 (서울과학기술대학교 환경공학과)
  • Seo, Younggyo (Department of Environmental Engineering, Seoul National University of Science and Technology) ;
  • Oh, Daemin (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Hwang, Yuhoon (Department of Environmental Engineering, Seoul National University of Science and Technology)
  • 투고 : 2018.07.29
  • 심사 : 2018.09.28
  • 발행 : 2018.10.15
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초록

Prussian blue is known as a superior material for selective adsorption of radioactive cesium ions; however, the separation of Prussian blue from aqueous suspension, due to particle size of around several tens of nanometers, is a hurdle that must be overcome. Therefore, this study aims to develop granule type adsorbent material containing Prussian blue in order to selectively adsorb and remove radioactive cesium in water. The surface of granular activated carbon was grafted using a covalent organic polymer (COP-19) in order to enhance Prussian blue immobilization. To maximize the degree of immobilization and minimize subsequent detachment of Prussian blue, several immobilization pathways were evaluated. As a result, the highest cesium adsorption performance was achieved when Prussian blue was synthesized in-situ without solid-liquid separation step during synthesis. The sample obtained under optimal conditions was further analyzed by scanning electron microscope-energy dispersive spectrometry, and it was confirmed that Prussian blue, which is about 9.7% of the total weight, was fixed on the surface of the activated carbon; this level of fixing represented a two-fold improvement compared to before COP-19 modification. In addition, an elution test was carried out to evaluate the stability of Prussian blue. Leaching of Prussian blue and cesium decreased by 1/2 and 1/3, respectively, compared to those levels before modification, showing increased stability due to COP-19 grafting. The Prussian blue based adsorbent material developed in this study is expected to be useful as a decontamination material to mitigate the release of radioactive materials.

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피인용 문헌

  1. 프러시안 블루 고정화에 따른 133Cs의 흡착거동 모델링 vol.36, pp.1, 2018, https://doi.org/10.14346/jkosos.2021.36.1.80