Biodegradation of Tetrachlorothylene Using Methanol as Co-metabolic Substrate

QI YANG; HAI-TAO SHANG; HUI-DI LI; HONG-BO XI; JIAN-LONG WANG

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Volume 21 Issue 2

Apr. 2008

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Article Navigation > Biomedical and Environmental Sciences > 2008 > 21(2): 98-102

QI YANG, HAI-TAO SHANG, HUI-DI LI, HONG-BO XI, JIAN-LONG WANG. Biodegradation of Tetrachlorothylene Using Methanol as Co-metabolic Substrate[J]. Biomedical and Environmental Sciences, 2008, 21(2): 98-102.

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QI YANG, HAI-TAO SHANG, HUI-DI LI, HONG-BO XI, JIAN-LONG WANG. Biodegradation of Tetrachlorothylene Using Methanol as Co-metabolic Substrate[J]. Biomedical and Environmental Sciences, 2008, 21(2): 98-102.

Biodegradation of Tetrachlorothylene Using Methanol as Co-metabolic Substrate

School of Water Resources and Environment,China University of Geoscience,Beijing 100083,China;Laboratory of Geomicrobiology,China University of Geoscience,Beijing 100083,China
School of Water Resources and Environment,China University of Geoscience,Beijing 100083,China
Laboratory of Environmental Technology,INET,Tsinghua University,Beifing 10008

Funds: 国家自然科学基金(40102027%50578151)%北京市自然科学基金(8052017)%The School-enterprise cooperation project of Beijing Municipal Education Commission(5190065005)

Abstract

Objective To investigate the biodegradation of tetrachloroethylene(PCE using methanol as electron donor by acclimated anaerobic sludge.Methods HP-6890 gas chromatograph(GC),together with HP-7694 autosampler,was used to analyze the concentration of PCE and intermediates. Results PCE could be decholrinated reductively to DCE via TCE,and probably further to VC and ethylene.The degradation of PCE and TCE conformed to first-order reaction kinetics.The reaction rate constants were 0.8991 d-1and 0.068 d-1,respectively,and the corresponding half-life were 0.77d and 10.19 d,respectively.TCE production rate constant was 0.1333 d-1.showing that PCE was degraded more rapidly than TCE. Conclusion Methanol is an electron donor suitable for PCE degradation and the cometabolic electron donors are not limiting factors for PCE degradation.
- Tetrachloroethylene,
- Anaerobic cometabolism,
- Biodegradation
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Biodegradation of Tetrachlorothylene Using Methanol as Co-metabolic Substrate

School of Water Resources and Environment,China University of Geoscience,Beijing 100083,China;Laboratory of Geomicrobiology,China University of Geoscience,Beijing 100083,China

School of Water Resources and Environment,China University of Geoscience,Beijing 100083,China

Laboratory of Environmental Technology,INET,Tsinghua University,Beifing 10008

Funds: 国家自然科学基金(40102027%50578151)%北京市自然科学基金(8052017)%The School-enterprise cooperation project of Beijing Municipal Education Commission(5190065005)

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Abstract: Objective To investigate the biodegradation of tetrachloroethylene(PCE using methanol as electron donor by acclimated anaerobic sludge.Methods HP-6890 gas chromatograph(GC),together with HP-7694 autosampler,was used to analyze the concentration of PCE and intermediates. Results PCE could be decholrinated reductively to DCE via TCE,and probably further to VC and ethylene.The degradation of PCE and TCE conformed to first-order reaction kinetics.The reaction rate constants were 0.8991 d-1and 0.068 d-1,respectively,and the corresponding half-life were 0.77d and 10.19 d,respectively.TCE production rate constant was 0.1333 d-1.showing that PCE was degraded more rapidly than TCE. Conclusion Methanol is an electron donor suitable for PCE degradation and the cometabolic electron donors are not limiting factors for PCE degradation.

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