Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Transformation Characteristics of Chlorinated Aliphatic Hydrocarbon (CAH) Mixtures by Natural Ores

자연광석을 이용한 염소계 지방족 탄화수소 혼합물 변환 특성

  • Son, Bong-han (Department of Environmental Health, Korea National Open University) ;
  • Kim, Nam-hee (Department of Environmental Engineering, Korea University) ;
  • Hong, Kwang-pyo (Department of Environmental Engineering, Korea University) ;
  • Yun, Jun-ki (Samsung Corporation Reserch Institute of Technology) ;
  • Lee, Chae-young (Department of Civil Engineering, Suwon University) ;
  • Kim, Young (Department of Environmental Engineering, Korea University) ;
  • Kwon, Soo-youl (Department of Environmental Health, Korea National Open University)
  • 손봉한 (한국방송통신대학교 환경보건학과) ;
  • 김남희 (고려대학교 환경시스템공학과) ;
  • 홍광표 (고려대학교 환경시스템공학과) ;
  • 윤준기 (삼성물산 기술연구소) ;
  • 이채영 (수원대학교 토목공학과) ;
  • 김영 (고려대학교 환경시스템공학과) ;
  • 권수열 (한국방송통신대학교 환경보건학과)
  • Received : 2007.08.23
  • Accepted : 2007.09.14
  • Published : 2007.09.30
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Abstract

This study screened three natural ores (iron, mangenase, and zinc), two types of slags, and two elemental metals (elemental iron and zinc) to evaluate transformation characteristics of CAH mixtures [e.g. Carbontetrachloride (CT), 1,1,1-Trichloroethane (1,1,1-TCA), and Perchloroethene (PCE)]. To select an effective metal medium to treat the CAH mixtures, we measured transformation capacities (CAH mass ultimately transformed/mass of metal added) and the degree of dechlorination. We also considered economical efficiency of the metal media by comparing the value, CAH mass ultimately transformed divided by the price of metal medium added. A simplified mathematical model adapting CAH transformation capacity, first-order transformation kinetics, and available mass of metal transforming CAH was developed and used for estimating CAH transformation rate coefficient and longevity of the metal medium. CAH transformation capacity for elemental iron and elemental zinc were 4258~7129 and $4215{\sim}6330{\mu}g\;CAH\;transformed/g$ metal added, respectively, which are a factor of 80~200 higher than slags and natural ores. They also showed a factor of 1.1 to 2.2 greater degree of dechlorination than the others. Among natural ores and slags, Zinc ore showed the highest transformation capacity, $47{\sim}53{\mu}g\;CAH\;transformed/g$ metal added. Although zinc ore have smaller transformation capacity than elemental metals, economical efficiency of zinc ore is a factor of 10~20 greater than elemental metals tested. Consequently, zinc ore would be more economical medium than the others tested in this study. We estimated the pseudo first-order transformation rate of zinc ore was in the order of CT > 1,1,1-TCA > PCE.

Keywords

References

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