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Phototransformation of 2,4,6-tribromophenol in aqueous solution: Kinetics and photolysis products
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.
Phototransformation of 2,4,6-tribromophenol in aqueous solution: Kinetics and photolysis products
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.
Phototransformation of 2,4,6-tribromophenol in aqueous solution: Kinetics and photolysis products
Zhao, Hong X. (author) / Jiang, Jing Q. (author) / Wang, Yan L. (author) / Xie, Qing (author) / Qu, Bao C. (author)
Journal of Environmental Science and Health, Part A ; 52 ; 45-54
2017-01-02
10 pages
Article (Journal)
Electronic Resource
English
Phototransformation of 2,4,6-tribromophenol in aqueous solution: Kinetics and photolysis products
| Online Contents | 2016
Phototransformation of 2,4,6-tribromophenol in aqueous solution: Kinetics and photolysis products
| Online Contents | 2017