外源电子供体在加速2,4,6-三氯苯酚生物转化和矿化中的作用。
The role of exogenous electron donors for accelerating 2,4,6-trichlorophenol biotransformation and mineralization.
作者信息
Yan Ning, Li Rongjie, Xu Hua, Li Ling, Yang Lihui, Zhang Yongming, Liu Rui, Rittmann Bruce E
机构信息
Department of Environmental Science and Engineering, College of Life and Environmental Science, Shanghai Normal University, Shanghai, 200234, People's Republic of China.
Zhejiang Provincial Key Laboratory of Water Science and Technology, Department of Environmental Technology and Ecology, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, Zhejiang, 314006, People's Republic of China.
出版信息
Biodegradation. 2016 Jun;27(2-3):145-54. doi: 10.1007/s10532-016-9762-9. Epub 2016 Apr 15.
2,4,6-Trichlorophenol (TCP) is a biologically recalcitrant compound, but its biodegradation via reductive dechlorination can be accelerated by adding an exogenous electron donor. In this work, acetate and formate were evaluated for their ability to accelerate TCP reductive dechlorination, as well to accelerate mono-oxygenation of TCP's reduction product, phenol. Acetate and formate accelerated TCP reductive dechlorination, and the impact was proportional to the number of electron equivalents released by oxidation of the donor: 8 e(-) equivalents per mol for acetate, compared to 2 e(-) eq per mol for formate. The acceleration phenomenon was similar for phenol mono-oxygenation, and this increased the rate of TCP mineralization. Compared to endogenous electron equivalents generated by phenol mineralization, the impact of exogenous electron donor was stronger on a per-equivalent basis.
2,4,6-三氯苯酚（TCP）是一种生物难降解化合物，但通过添加外源电子供体可加速其通过还原脱氯的生物降解过程。在本研究中，评估了乙酸盐和甲酸盐加速TCP还原脱氯的能力，以及加速TCP还原产物苯酚单加氧作用的能力。乙酸盐和甲酸盐加速了TCP的还原脱氯，其影响与供体氧化释放的电子当量数成正比：乙酸盐每摩尔释放8个电子当量，而甲酸盐每摩尔释放2个电子当量。苯酚单加氧作用的加速现象类似，这提高了TCP矿化的速率。与苯酚矿化产生的内源电子当量相比，外源电子供体在每当量基础上的影响更强。
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