The role of exogenous electron donors for accelerating 2,4,6-trichlorophenol biotransformation and mineralization

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• 作者：Ning Yan ; Rongjie Li ; Hua Xu ; Ling Li ; Lihui Yang ; Yongming Zhang…
• 刊名：Biodegradation
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：27
• 期：2-3
• 页码：145-154
• 全文大小：1,057 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Soil Science and Conservation
  Geochemistry
  Terrestrial Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Waste Management and Waste Technology
  
• 出版者：Springer Netherlands
• ISSN：1572-9729
• 卷排序：27

文摘

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.Keywords2,4,6-TrichlorophenolBiodegradationElectron donorsReductive dechlorinationMono-oxygenation