地下水三氯乙烯原位生物修复及其影响因素综述  

Influencing factors of in-situ bioremediation of TCE-contaminated groundwater

作　　者：程莉蓉[1,2] 刘奕慧[1,2] 丁爱中[1,2] 崔双超[1,2] 陈海英[3] 

机构地区：[1]北京师范大学水科学研究院,北京100875 [2]地下水污染控制与修复教育部工程研究中心,北京100875 [3]环境保护部核与辐射安全中心,北京100082

出　　处：《安全与环境学报》2012年第4期88-95,共8页Journal of Safety and Environment

基　　金：国家自然科学基金项目(40873076);北京市自然科学基金项目(8112014)

摘　　要：对地下水三氯乙烯(TCE)原位生物修复技术的研究现状进行了综述,阐述了三氯乙烯(TCE)好氧共代谢和厌氧还原脱氯的降解过程,将地下水TCE原位生物修复的影响因素归结为生物因素和工程因素。其中生物因素是指与TCE生物降解机理相关的因素,工程因素是指与场地修复工程的设计和运行有关的因素。结果表明,目前生物因素研究较为成熟;工程因素的影响更为普遍,建立正确的场地概念模型对其修复的成败有重要作用。因此,TCE原位生物修复设计前应更注重对污染场地的水文地质条件和水化学条件的调查,并结合数值模拟方法对污染场地进行更准确的概化。In-situ bioremediation of trichloroethylene （TCE） contaminated aquifer is a promising and widely used technology. However, incomplete degradation of TCE to harmless end products and clogging are common problems associated with the technique. This paper reviewed in detail the biodegradation processes, i. e., aerobic eometabolic degradation and anaerobic reductive deehlorination, and catagorized the influencing factors of the success of the technique into two types： the biological factors and engineering factors. The biological category refers to the factors influencing the process of trichloroethylene biodegradation, such as the types of microorganisms, nutrient and environmental factors affecting the microbial activity; the engineering category refers to the engineering design and operation of the facility, such as the delivery of microbe and nutrient, the investigation of hydrogeology and groundwater geochemistry of the site. Since the biodegradation ability of TCE is proven in lab experiments prior to field application in most cases, the biological factors are more mature and the final success of field applications thus replies on engineering design for the most part. As a result, it is important to find proper engineering design for the special site. Building a correct conceptual model of the site is a crucial first step for successful in-situ bioremediation. A well calibrated high resolution flow model is a useful and important tool to characterize the flow field which is vital to engineering design. In addition to that, a thorough investigation and study of groundwater geochemistry is also needed to help guide the selection and delivery of various chemical agents in the field. So com- bining investigation results of hydrology and groundwater biochemistry with numerical model is a good method to help build a correct model of the site. And engineering design on the basis of sufficient correct information probably produce a successful in-situ bioremediation avoiding some common problems such as incomplete

关 键 词：环境工程学 三氯乙烯 原位生物修复 生物因素 工程因素 模型 

分 类 号：X523[环境科学与工程—环境工程]