Biodegradation of tetrachlorothylene using methanol as co-metabolic substrate.
Biodegradation of tetrachlorothylene using methanol as co-metabolic substrate.
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DOI：
10.1016/s0895-3988(08)60013-6
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发表时间：
2008-02
期刊：
影响因子：
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通讯作者：
Qi Yang;Haitao Shang;Hui-di Li;H. Xi;Jian-long Wang
中科院分区：
文献类型：
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作者：
Qi Yang;Haitao Shang;Hui-di Li;H. Xi;Jian-long Wang
目的研究驯化的厌氧污泥对以甲醇为电子供体的四氯乙烯（PCE）的生物降解。方法采用HP-6890型气相色谱仪和HP-7694型自动进样器对PCE及其中间产物进行分析。结果PCE经TCE还原脱氯为DCE，并可能进一步脱氯为VC和乙烯。PCE和TCE的降解符合一级反应动力学。反应速率常数分别为0.8991 d-1和0.068 d-1，相应的半衰期分别为0.77 d和10.19 d。TCE的生成速率常数为0.1333 d-1，表明PCE的降解速度比TCE快。结论甲醇是适合PCE降解的给电子体，共代谢给电子体不是PCE降解的限制因素。
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-1 and 0.068 d-1, respectively, and the corresponding half-life were 0.77 d 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.