中文摘要：

采用吸附/脱附平衡实验考察了温度对鼠李糖脂作用下三氯生（TCS）在底泥/水中分配的影响,以及鼠李糖脂浓度、泥水比、反应时间、TCS初始浓度对鼠李糖脂脱附底泥中TCS的影响;并通过Box-Behnken响应曲面法（RSM）确定了鼠李糖脂强化脱附底泥中TCS的影响因素排序、最佳脱附条件和调控策略。结果表明,在283~323 K的温度范围内,温度越高,TCS越容易向水相迁移;鼠李糖脂浓度越大、泥水比越低、时间越长、TCS初始浓度越低,越有利于鼠李糖脂脱附TCS。各影响因素作用排序为：泥水比〉鼠李糖脂浓度〉pH〉时间;最佳脱附条件：鼠李糖脂浓度2 996.96 mg·L^-1、泥水比10 g·L^-1、反应时间30 h及pH 7.9。此时,鼠李糖脂对底泥中TCS的最大脱附率可达90.70%。可为鼠李糖脂生物表面活性剂强化受TCS污染水体的原位修复的可行性提供判据。

英文摘要：

The effect of temperature on the distribution of TCS in a sediment-water-rhamnolipid system;and the effects of rhamnolipid concentration,ratio of sediment to water,time,and the initial TCS concentration on desorption of TCS from sediment by rhamnolipid were investigated by sorption/desorption equilibrium experiments. The order of the degree of factor influence,optimum desorption conditions,and control strategy were obtained using a response surface orthogonal test（ RSM）. Results showed that with increased temperature（ 293 to323 K）,TCS more easily shifted to aqueous phase. The higher the rhamnolipid concentration was,the lower the ratio of sediment to water and the greater the time. The lower the initial TCS concentration was,the more TCS molecules desorbed. The degree of influence of the factors studied was the ratio of sediment to water rhamnolipid concentration pH time. The optimum desorption conditions for rhamnolipid concentration,the ratio of sediment to water,time,and pH were found to be 2 996. 96 mg·L~（-1）,10 g·L~（-1）,30 h,and 7. 95,respectively. An optimum value of TCS desorption percent from sediment（ about 90. 70%） was obtained under this condition. These findings provide a theoretical basis for application of rhamnolipid biosurfactant in improving in situ ecological restoration of water polluted by TCS.