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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, Fe 3+ and NO 2 − ) 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 Fe 3+ and NO 2 − 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, Fe 3+ and NO 2 − ) 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 Fe 3+ and NO 2 − 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 / Wang, Yan L / Xie, Qing / Qu, Bao C
2017
Article (Journal)
English
USA , Recht , Zeitschrift , Datenverarbeitung
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
| Taylor & Francis Verlag | 2017