三氯乙烯好氧生物降解的初步研究  

Biodegradation of trichloroethylene (TCE) under aerobic conditions

作　　者：陈翠柏[1] 杨琦[1] 尚海涛[1] 沈照理[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》2004年第11期35-37,47,共4页Techniques and Equipment for Environmental Pollution Control

基　　金：国家自然科学基金资助项目 (4 0 10 2 0 2 7)

摘　　要：工业溶剂三氯乙烯 (TCE)是地下水污染物中发现的最普遍的氯代化合物。本研究的目的是评价以葡萄糖为初始基质时好氧条件下TCE生物降解的可行性 ,以及以TCE为单一基质时的生物降解情况。微生物培养是在好氧条件下以驯化好的活性污泥作为接种体。实验结果表明 ,在 2 5℃时 ,葡萄糖可以在好氧条件下作为共代谢基质使TCE发生生物降解 ,其一级反应速率常数为 0 32 12d-1,半衰期为 2 16d ;TCE可以作为单一基质发生好氧生物转化 ,其一级反应速率常数为 0 2 6 2 4d-1,半衰期为 2 6 4d ;降解过程中无二氯乙烯 (DCE)和氯乙烯 (VC)等中间产物的形成 ;表明葡萄糖共代谢降解TCE的速率大于TCE作为单一基质的降解速率。The industrial solvent trichloroethylene (TCE) is among the most ubiquitous chlorinated compounds found in groundwater contamination. The objective of this study was to examine the feasibilities of TCE biodegradation using glucose as the primary substrate and using TCE as the only substrate under aerobic condition. Microcosms inoculated with acclimated activated sludge were constructed. Results indicate that glucose can serve as a primary substrate and enhance TCE biodegradation under aerobic cometabolism; the TCE first order biodegradation rate at 25℃ was 0.3212 day -1 . Also, results indicate that TCE can serve as the only substrate and be biodegraded under aerobic condition; the TCE first order degradation rate at 25℃ was determined to be 0.2624 day -1 . No intermediate products such as DCE and VC were detected during reaction.

关 键 词：好氧条件 好氧生物降解 TCE 共代谢基质 活性污泥 地下水污染 一级反应 三氯乙烯 葡萄糖 初步研究 

分 类 号：X703[环境科学与工程—环境工程] X523