title: Phototransformation of 2,4,6-tribromophenol in aqueous solution: Kinetics and photolysis products.
abstract: In this research, we studied the phototransformation of 2,4,6-tribromophenol (TBP) by UV irradiation in aqueous solution. Effects of typical environmental factors (i.e., pH and the initial concentration of TBP, Fe3+and NO2-) were also investigated. Results showed that the transformation process followed pseudo-first-order kinetics. The transformation rate constant of TBP decreased with increasing initial concentration and increased with increasing Fe3+and NO2-concentrations as well as increasing pH. Ten photoproducts were tentatively identified after irradiation of TBP, according to HPLC-LTQ-Orbitrap MS and GC/MS analysis. Among them, two dihydroxylated dibromobenzene compounds (di-OH-DBB) were found to be predominant over the reaction time, indicating that hydrodebromination of TBP could be the main phototransformation mechanism. In addition, the identification of eight OH-PBDEs and di-OH-PBBs suggested that photodimerization might also be a reaction pathway for TBP photochemical reactions.
authors.affiliation: a Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education) , School of Environmental Science and Technology, Dalian University of Technology , Dalian , China.
authors.forename: Hong X
authors.initials: HX
authors.lastname: Zhao
authors.affiliation: a Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education) , School of Environmental Science and Technology, Dalian University of Technology , Dalian , China.
authors.forename: Jing Q
authors.initials: JQ
authors.lastname: Jiang
authors.affiliation: a Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education) , School of Environmental Science and Technology, Dalian University of Technology , Dalian , China.
authors.forename: Yan L
authors.initials: YL
authors.lastname: Wang
authors.affiliation: a Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education) , School of Environmental Science and Technology, Dalian University of Technology , Dalian , China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Xie
authors.affiliation: b Dalian Institute of Food Inspection , Dalian , China.
authors.forename: Bao C
authors.initials: BC
authors.lastname: Qu
mesh_terms: D002851:Chromatography, High Pressure Liquid; D055768:Halogenated Diphenyl Ethers / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D007700:Kinetics; D013058:Mass Spectrometry / Q000379:methods; D010636:Phenols / Q000737:chemistry / Q000528:radiation effects*; D010782:Photolysis; D011075:Polybrominated Biphenyls / Q000737:chemistry; D012996:Solutions; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000528:radiation effects*
chemical_list: D055768:Halogenated Diphenyl Ethers; D010636:Phenols; D011075:Polybrominated Biphenyls; D012996:Solutions; D014874:Water Pollutants, Chemical; C086401:pentabromodiphenyl ether; D007501:Iron; C004554:2,4,6-tribromophenol
keywords: 2,4,6-Tribromophenol (TBP); UV irradiation; aqueous factor; phototransformation