Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Assessment of Cobalt Removal from Radioactive Liquid Waste Using Electrocoagulation

방사성 액체폐기물 내 코발트 제거를 위한 전기응집공법의 활용 가능성 평가

  • Ko, Myoung-Soo (School of Earth Sciences and Environmental Engineering, Gwangju institute of Science and Technology (GIST)) ;
  • Kim, Yong-Tae (School of Earth Sciences and Environmental Engineering, Gwangju institute of Science and Technology (GIST)) ;
  • Kim, Young-Gwang (School of Earth Sciences and Environmental Engineering, Gwangju institute of Science and Technology (GIST)) ;
  • Kim, Kyoung-Woong (School of Earth Sciences and Environmental Engineering, Gwangju institute of Science and Technology (GIST))
  • 고명수 (광주과학기술원 지구환경공학부) ;
  • 김용태 (광주과학기술원 지구환경공학부) ;
  • 김영광 (광주과학기술원 지구환경공학부) ;
  • 김경웅 (광주과학기술원 지구환경공학부)
  • Received : 2018.03.20
  • Accepted : 2018.04.04
  • Published : 2018.04.28
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Abstract

This study assessed an application of electrocoagulation (EC) for the removal of cobalt (Co) in radioactive liquid waste from nuclear power plant. The EC process is an electrochemical means to remove a contaminant in wastewater and a novel process to complement the disadvantage of chemical treatment and membrane process. Radioactive liquid waste has been produced from washing process of radio nuclide power plant cooling system. The EC process eliminates Co from the electrolyte within 10 min; in addition, the dewatered sludge produced in EC process is only 0.2 g. Therefore, the EC process is a promising technique for the removal of Co in radioactive liquid waste and volume reduction of wastes.

본 연구는 원자력 발전시설에서 발생하는 방사성 액체폐기물 내 코발트의 제거를 위해 전기응집공법의 적용 가능성을 확인하였다. 전기응집공법은 전기화학반응을 이용하여 폐액 내 오염물질을 제거하는 방법으로 기존의 화학처리와 막공정의 단점을 보완하는 새로운 기술이다. 원자력 발전시설에서는 냉각 배관의 세척과정에서 코발트를 포함한 방사성 액체폐기물이 발생한다. 용액 내 코발트의 농도를 1 mg/L와 10 mg/L로 조성하여 전기응집공법을 적용한 결과 약 10분 이내에 코발트가 완전히 제거되었다. 또한 500 mL의 코발트 용액을 처리하는 과정에서 0.2 g의 슬러지가 발생하여 폐기물의 부피감용에 매우 효과적인 것으로 나타났다.

Keywords

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