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中文摘要：
研究鼠李糖脂对苏云金芽孢杆菌J-1降解/吸附水体中BDE-209/Pb的影响及机理。研究结果表明：一定质量浓度范围的鼠李糖脂（20-100 mg/L）能促进BDE-209/Pb复合污染体系中菌J-1对BDE-209的降解和对Pb的吸附;50 mg/L的鼠李糖脂可将菌J-1对BDE-209（1mg/L）的降解率提高38.37%,对Pb（1 mg/L）的吸附率提高16.46%;鼠李糖脂能以单分子或胶束形式与Pb结合,从而缓解菌J-1在降解BDE-209的过程中Pb对菌体的毒性,促进BDE-209的生物降解。高浓度鼠李糖脂对菌J-1降解BDE-209和吸附Pb有抑制作用;当鼠李糖脂质量浓度大于200 mg/L时会造成菌体萎缩死亡。
英文摘要：
The effect and mechanism of rhamnolipid on Bacillus thuringiensis J-1 degrading/adsorbing BDE-209/Pb in water body were studied. The results show that rhanmolipid of certain mass concentration range （20-100 mg/L） can enhance the degradation of BDE-209 and the adsorption of Pb by J-1 in BDE-209/Pb combined pollution system. The degradation efficiency of BDE-209 （1 mg/L） and the adsorption capability of Pb （1 mg/L） increase by 38.37% and 16.46%, respectively, when the concentration of rhamnolipid is 50 mg/L. Rhamnolipid combines with Pb in the form of single molecule or micelle, alleviating the toxicity of Pb to J-1 and enhancing BDE-209 biodegradation. High concentration of rhamnolipid can inhibit J-1 ＇s ability to degrade BDE-209 and adsorb Pb. The high level rhamnolipid （〉 200 mg/L） can cause J-1 to shrivel and die.
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