Mechanisms for rhamnolipids-mediated biodegradation of hydrophobic organic compounds
Mechanisms for rhamnolipids-mediated biodegradation of hydrophobic organic compounds
复制标题
鼠李糖脂介导的疏水性有机化合物生物降解机制
DOI：
10.1016/j.scitotenv.2018.03.349
复制
发表时间：
2018
影响因子：
9.8
通讯作者：
Qin Lei
中科院分区：
文献类型：
--
作者：
Zeng Zhuotong;Liu Yang;Zhong Hua;Xiao Rong;Zeng Guangming;Liu Zhifeng;Cheng Min;Lai Cui;Zhang Chen;Liu Guansheng;Qin Lei
土壤和水体中广泛存在的疏水性有机化合物（HOCs）对人类健康具有潜在的危害，如皮肤病、心脏病、致癌等。表面活性剂强化生物修复技术被认为是处理HOCs污染土壤和地下水最可行的技术之一。作为一种生物表面活性剂，鼠李糖脂已被广泛研究，已被证明可以促进HOCs在环境中的生物降解，但其潜在的机制尚未完全揭示。本文综述了鼠李糖脂的性质和生产方法。然后详细介绍了鼠李糖脂对HOCs生物降解的影响，包括增溶作用、改变细胞对HOCs的亲和力以及促进微生物对HOCs的吸收。特别注意的是如何鼠李糖脂改变HOCs的生物利用度，这是至关重要的了解机制的鼠李糖脂介导的生物降解。并对鼠李糖脂的生物降解性和毒性进行了讨论。最后，展望了未来的研究方向。本文综述了鼠李糖脂对生物降解的促进作用，为鼠李糖脂在生物修复中的应用提供参考。
The widespread existence of hydrophobic organic compounds (HOCs) in soil and water poses a potential health hazard to human, such as skin diseases, heart diseases, carcinogenesis, etc. Surfactant-enhanced bioremediation has been regarded as one of the most viable technologies to treat HOCs contaminated soil and groundwater. As a biosurfactant that has been intensively studied, rhamnolipids have shown to enhance biodegradation of HOCs in the environment, however, the underlying mechanisms are not fully disclosed. In this paper, properties and production of rhamnolipids are summarized. Then effects of rhamnolipids on the biodegradation of HOCs, including solubilization, altering cell affinity to HOCs, and facilitating microbial uptake are reviewed in detail. Special attention is paid to how rhamnolipids change the bioavailability of HOCs, which are crucial for understanding the mechanism of rhamnolipids-mediated biodegradation. The biodegradation and toxicity of rhamnolipids are also discussed. Finally, perspectives and future research directions are proposed. This review adds insight to rhamnolipids-enhanced biodegradation process, and helps in application of rhamnolipids in bioremediation.