Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Preliminary Experiments for the Remediation of Trichloroethene-Contaminated Groundwater Using Direct-Current and Zero-Valent Iron

0가 철과 직류전원을 이용한 TCE 오염 지하수의 정화기법 예비조사

  • Moon, Ji-Won (Department of Earth System Sciences, Yonsei University) ;
  • Moon, Hi-Soo (Department of Earth System Sciences, Yonsei University) ;
  • Roh, Yul (Environmental Sciences Division, Oak Ridge National Laboratory) ;
  • Lee, Suk-Young (Department of Earth System Sciences, Yonsei University) ;
  • Song, Yun-Goo (Department of Earth System Sciences, Yonsei University)
  • 문지원 (연세대학교 지구시스템과학과) ;
  • 문희수 (연세대학교 지구시스템과학과) ;
  • 노열 (오크릿지 국립연구소) ;
  • 이석영 (연세대학교 지구시스템과학과) ;
  • 송윤구 (연세대학교 지구시스템과학과)
  • Published : 2001.06.01
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Abstract

Reactive medium including zero-valent metals such as zero-valent iron ($Fe^0$) degrades chlorinated solvents as a contaminant plume flows through the treatment medium. Although the Feo based reactive barrier has been demonstnlted to be a cost effective for trichloroethenc (TCE)-contaminaled plume remediation, current approach is limited by low process eftlciency and uncertain, effective life of the medium. The objective of this study is to develop an enhanced treatment method of TeE-contaminated groundwater using Feo and direct current. The bench-scale test using flow-through $Fe^0$ reactor column confirmed that the application of direct current with $Fe^0$ is highly effective in enhancing the rate of TeE dechlorination. The dechlorination mechanism appears to be reductive, with the electrons supplied by the iron oxidation and external power supply serving as the additional source of electrons.

$Fe^0$ 등의 0가 금속을 포함하는 반응재들은 오염운이 반응벽을 통과하는 동안 염소계 용매들을 분해시킨다. Fe$^{0}$ 를 이용한 투수성 반응벽은 특히 trichloroethene(TCE)이 주된 오염원인 경우 처리비용이 적다는 장점이 있는 반면, 반응속도가 느리고, 반응벽의 운영기간이 제한된다는 단점이 있다. 본 연구는 기존의 Fe$^{0}$ 를 이용한 반응벽에 직류전원을 걸어주는 향상된 처리기술 개발은 예비연구이다. $Fe^0$ 반응컬럼을 이용한 bench-scale의 실험을 통해 $Fe^0$ 반응재와 직류전원의 조합은 TCE의 탈염소화를 촉진하는 것으로 나타났다. 탈염소화의 반응기작은 철의 산화와 부가적인 전자의 공급원인 외부전원에 의한 환원에 기인한다.

Keywords

References

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