Anaerobic Degradation of Tetrachloroethylene Using Different Co-substrates as Electron Donors  

作　　者：QI YANG HAI-TAO SHANG XUE-LIAN WANG HUI-DI LI JIAN-LONG WANG 

机构地区：[1]School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China [2]Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, China

出　　处：《Biomedical and Environmental Sciences》2006年第1期73-76,共4页生物医学与环境科学（英文版）

基　　金：This work was supported by the National Science Foundation of China (Grant No. 40102027; 50325824; 50578151 and BeijingNatural Science Foundation 8052017).

摘　　要：Objective To investigate the biodegradation of tetrachloroethylene （PCE） by acclimated anaerobic sludge using different co-substrates, i.e., glucose, acetate, and lactate as electron donors. Methods HP-6890 gas chromatograph （GC） in combination with auto-sampler was used to analyze the concentration of PCE and its intermediates, Results PCE could be degraded by reductive dechlorlnation and the degradation reaction conformed to the first-order kinetic equation. The rate constants are klaetate〉kglucose〉kacetate. The PCE degradation rate was the highest in the presence of lactate as an electron donor. Conclusion Lactate is the most suitable electron donor for PCE degradation and the electron donors supplied by co-metabolic substrates are not the limiting factors for PCE degradation,Objective To investigate the biodegradation of tetrachloroethylene （PCE） by acclimated anaerobic sludge using different co-substrates, i.e., glucose, acetate, and lactate as electron donors. Methods HP-6890 gas chromatograph （GC） in combination with auto-sampler was used to analyze the concentration of PCE and its intermediates, Results PCE could be degraded by reductive dechlorlnation and the degradation reaction conformed to the first-order kinetic equation. The rate constants are klaetate〉kglucose〉kacetate. The PCE degradation rate was the highest in the presence of lactate as an electron donor. Conclusion Lactate is the most suitable electron donor for PCE degradation and the electron donors supplied by co-metabolic substrates are not the limiting factors for PCE degradation,

关 键 词：Tetrachloroethylene （PCE） Co-metabolic substrate BIODEGRADATION Electron donor 

分 类 号：Q14[生物学—生态学]