针对自然水体中三氯生（TCS）易吸附于底泥而不易被厌氧微生物降解的问题，提出采用鼠李糖脂同系物调控TCS在水/底泥中的分配，使TCS从底泥向水相定向迁移，从而强化其在自然水体中的好氧微生物降解。本研究从鼠李糖脂同系物表面活性差异性出发，建立完全混合体系和易置换模拟底泥柱体系，采用吸附/脱附和土著微生物降解实验，重点研究不同环境介质及条件下，各鼠李糖脂同系物与TCS的相互作用机制，各鼠李糖脂同系物对TCS在水/底泥中的分配与迁移影响效应；探明各鼠李糖脂同系物作用下，水/底泥中好氧土著微生物降解TCS途径与效率，解释鼠李糖脂对TCS生物有效性的影响效应；在此基础上，揭示鼠李糖脂作用下TCS在水/底泥中的迁移转化规律，进而提出特定鼠李糖脂同系物作用下TCS在水/底泥中受控定向迁移与强化生物降解的调控策略，推动受PPCPs污染水体的生物表面活性剂强化原位生态修复基础理论及技术的发展。

Rhamnolipids are one of the best known biosurfactants and are usually produced as multicomponent mixtures of homologues. Be aimed at the problem that triclosan (TCS) is so easily adsorbed onto sediments and is hardly degraded by anaerobic microbe in natural water bodies, rhamnolipidic homologues are applied to promote the migration of TCS toward aqueous phase and enhance its aerobic microbial biodegradation in natural water bodies. In this study, several rhamnolipidic homologues are firstly separated and their molecular structures and micellization properties are characterized.A simulated completely mixed system and a mixable displacement sediment column system are developed to investigate the interaction between the TCS and rhamnolipidic homologues under different environmental conditions,including the micellar solubilization, sorption/desorption behaviour of TCS between water and sediment , efficiency and pathway of the enhanced native microbial biodegradation of TCS in water/sediment system. In additon,the factors that affect the TCS bioavailability by the rhamnolipidic homologue are also studied. Based on these, the enhanced migration and degradation characteristic of the TCS in water/sediment system by the rhamnolipidic homologues can be clarified and the regulation strategy can be obtained. This work will provide useful information for biosurfactants enhanced bioremediation of PPCPs. It also enriches the research content of in situ bioremediation theory and technology involving using biosurfactants for restoration of polluted water bodies .