不同共代谢基质对四氯乙烯的厌氧生物降解研究  

Study on anaerobic biodegradation of tetrachloroethylen by different cometabolic substrates as electron donors

作　　者：杨琦[1] 尚海涛[1] 李惠娣[1] 

机构地区：[1]中国地质大学水资源与环境学院,北京100083

出　　处：《环境污染治理技术与设备》2005年第9期16-19,共4页Techniques and Equipment for Environmental Pollution Control

基　　金：国家自然科学基金资助项目(40102027);北京市自然科学基金资助项目(8052017)

摘　　要：用驯化好的厌氧污泥对葡萄糖、乳酸盐和醋酸盐作为电子供体时四氯乙烯(PCE)的降解进行研究。实验结果表明,PCE是通过还原脱氯发生生物降解的。实验的回归结果表明,反应均符合一级动力学反应速率,常数的大小依次为k乳酸>k葡萄糖>k醋酸。表明乳酸盐作为电子供体时PCE的降解速率较快,说明在实验条件下乳酸盐是最合适的电子供体。并且在整个实验过程中由共代谢基质提供的电子供体不是PCE降解的限制因素。We studied PCE degradation by acclimated anaerobic sludge,glucose, acetate and lactate as cometabolic substrates. Results show that PCE is degraded by reduetive deehlorination. Regression results show that the reaction meets 1 order kinetics, and reaction rate constants are k lactate〉 k glucose 〉 k acetate . It shows that lactate as electron donor PCE degradation rate is rapid, and lactate is suitable electron donor in our experiment. Electrons provided by eometabolie substrates are not limited factors of PCE degradation through all experiments.

关 键 词：四氯乙烯(PCE) 共代谢基质 生物降解 电子供体 

分 类 号：X783[环境科学与工程—环境工程]