不同基质作为电子供体时四氯乙烯的降解研究  

Study on Biodegradation of Tetrachloroethylene with Various Substrates as Electron Donors

作　　者：李惠娣[1] 杨琦[2] 尚海涛[2] 

机构地区：[1]中国地质科学院地质力学研究所,北京100081 [2]中国地质大学水资源与环境学院,北京100083

出　　处：《安全与环境工程》2006年第4期45-49,共5页Safety and Environmental Engineering

基　　金：国家自然科学基金项目(No.40102027)资助

摘　　要：将取回的厌氧污泥进行培养、驯化,并用驯化好的厌氧污泥进行PCE的厌氧生物降解研究。实验选用甲醇、乳酸盐和醋酸盐作为电子供体,对PCE的降解进行研究。实验结果表明:PCE通过还原脱氯实现其降解,在本实验条件下PCE的降解均符合一级反应动力学。通过对反应速率常数(k)的比较发现,乳酸盐是最有效的电子供体。Anaerobic sludge obtained was cultivated and acclimated, and PCE biodegradation was studied by acclimated sludge. PCE degradation was carried out when methanol, lactate, and acetate were used as electron donors. Results show that PCE was degraded by reductive dechlorination. Results also indicate that PCE degradation met first-order kinetics during these experiments. Comparison results of reaction rate constants show that lactate was the most effective electron donor.

关 键 词：四氯乙烯(PCE) 电子供体 生物降解 动力学 反应速率常数 

分 类 号：X13[环境科学与工程—环境科学]