title: The role of exogenous electron donors for accelerating 2,4,6-trichlorophenol biotransformation and mineralization.
abstract: 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.
authors.affiliation: Department of Environmental Science and Engineering, College of Life and Environmental Science, Shanghai Normal University, Shanghai, 200234, People's Republic of China.
authors.forename: Ning
authors.initials: N
authors.lastname: Yan
authors.affiliation: Department of Environmental Science and Engineering, College of Life and Environmental Science, Shanghai Normal University, Shanghai, 200234, People's Republic of China.
authors.forename: Rongjie
authors.initials: R
authors.lastname: Li
authors.affiliation: Department of Environmental Science and Engineering, College of Life and Environmental Science, Shanghai Normal University, Shanghai, 200234, People's Republic of China.
authors.forename: Hua
authors.initials: H
authors.lastname: Xu
authors.affiliation: Department of Environmental Science and Engineering, College of Life and Environmental Science, Shanghai Normal University, Shanghai, 200234, People's Republic of China.
authors.forename: Ling
authors.initials: L
authors.lastname: Li
authors.affiliation: Department of Environmental Science and Engineering, College of Life and Environmental Science, Shanghai Normal University, Shanghai, 200234, People's Republic of China.
authors.forename: Lihui
authors.initials: L
authors.lastname: Yang
authors.affiliation: Department of Environmental Science and Engineering, College of Life and Environmental Science, Shanghai Normal University, Shanghai, 200234, People's Republic of China. zhym@shnu.edu.cn.
authors.forename: Yongming
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: 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.
authors.forename: Rui
authors.initials: R
authors.lastname: Liu
authors.affiliation: Swette Center for Environmental Biotechnology, Biodesign Institute, Arizona State University, Tempe, AZ, 85287-5701, USA.
authors.forename: Bruce E
authors.initials: BE
authors.lastname: Rittmann
mesh_terms: D001673:Biodegradation, Environmental; D018441:Biofilms; D019149:Bioreactors; D001711:Biotransformation; D002733:Chlorophenols / Q000378:metabolism*; D004583:Electrons; D008903:Minerals / Q000378:metabolism*; D010636:Phenols / Q000378:metabolism
chemical_list: D002733:Chlorophenols; D008903:Minerals; D010636:Phenols; C024564:2,4,6-trichlorophenol
keywords: 2,4,6-Trichlorophenol; Biodegradation; Electron donors; Mono-oxygenation; Reductive dechlorination