Effect of Electron Acceptors on the Anaerobic Biodegradation of BTEX and MTBE at Contaminated Sites

전자 수용체가 BTEX, MTBE로 오염된 토양의 혐기성 자연정화에 미치는 영향

  • Kim, Won-Seok (Water Environment and Remediation Center, Korea Institute of Science and Technology) ;
  • Kim, Ji-Eun (Water Environment and Remediation Center, Korea Institute of Science and Technology) ;
  • Baek, Ji-Hye (College of Pharmacy, Sungkyunkwan University) ;
  • Sang, Byoung-In (Water Environment and Remediation Center, Korea Institute of Science and Technology)
  • 김원석 (한국과학기술연구원 수질환경 및 복원연구센터) ;
  • 김지은 (한국과학기술연구원 수질환경 및 복원연구센터) ;
  • 백지혜 (성균관대학교 약학과) ;
  • 상병인 (한국과학기술연구원 수질환경 및 복원연구센터)
  • Received : 2005.04.18
  • Accepted : 2005.05.30
  • Published : 2005.07.30

Abstract

Methyl tert-butyl ether (MTBE) contamination in groundwater often coexists with benzene, toluene, ethylbenzene, and xylene (BTEX) near the source of the plume. Then, groundwater contamination problems have been developed in areas where the chemical is used. Common sources of water contamination by BTEX and MTBE include leaking underground gasoline storage tanks and leaks and spills from above ground fuel storage tanks, etc. In oil-contaminated environments, anaerobic biodegradation of BTEX and MTBE depended on the concentration and distribution of terminal electron acceptor. In this study, effect of electron acceptor on the anaerobic biodegradation for BTEX and MTBE-contaminated soil was investigated. This study showed the anaerobic biodegradation of BTEX and MTBE in two different soils by using nitrate reduction, ferric iron reduction and sulfate reduction. The soil samples from the two fields were enriched for 65 days by providing BTEX and MTBE as a sole carbon source and nitrate, sulfate or iron as a terminal electron acceptor. This study clearly shows that degradation rate of BTEX and MTBE with electron acceptors is higher than that without electron acceptors. Degradation rate of Ethylbenzene and Xylene is higher than that of Benxene, Toluene, and MTBE. In case of Benzene, Ethylbenzene, and MTBE, nitrate has more activation. In case of Toluene and Xylene, sulfate has more activation.

Keywords

Acknowledgement

Grant : Geomicrobiology를 이용한 오염토양 및 지하수의 자연정화형 복원 및 평가기술

Supported by : 환경부

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