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

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)
Publication Information
Journal of Korean Society on Water Environment / v.21, no.4, 2005 , pp. 403-409 More about this Journal
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
Methyl tert-butyl ether (MTBE); Benzene; toluene; ethylbenzene; and xylene (BTEX); Anaerobic biodegradation; Electron acceptor; Contaminated soil;
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