Photochemical reaction between biphenyl and N(III) in the atmospheric aqueous phase. (January 2017)

• Record Type: Journal Article
• Authors: Ma, Jianzhong; Zhu, Chengzhu; Lu, Jun; Wang, Tao; Hu, Shuheng; Chen, Tianhu
• Is Part Of: Chemosphere. Volume 167(2017)
• Page Start: 462
• Page End: 468
• Publication Date: 2017-01
• Subjects: Biphenyl -- Hydroxyl radical -- Photochemistry -- N(III) -- Atmospheric aqueous phase; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2016.10.010
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: The photochemical reaction between biphenyl (Bp) and N(III) under irradiation at 365 nm UV light was investigated. The results showed that Bp conversion efficiency was strongly influenced by N (III) concentration, Bp initial concentration and pH. Species-specific rate constants determined by reaction of Bp with H2 ONO + ( k 1 ), HONO ( k 2 ) and NO2 − ( k 3 ) were k 1 = (0.058 ± 0.005 L mol −1 s −1 ), k 2 = (0.12 ± 0.06 L mol −1 s −1 ) and k 3 = (0.0019 ± 0.0003 L mol −1 s −1 ), respectively. Laser flash photolysis studies confirmed that OH radical deriving from the photolysis of N(III) attacked aromatic ring to form Bp-OH adduct with a rate constant of 9.4 × 10 9 L mol −1 s −1 . The products analysis suggested that Bp-OH adduct could be nitrated by N (III) and NO2 to generate nitro-compounds. Graphical abstract: Image 1 Highlights: The rate constants of biphenyl with H2 ONO +, HONO and NO2 − were determined. OH reacts with biphenyl with a rate constant of 9.4 × 10 9 L mol −1 s −1 . Nitro-compounds was generated from the reaction between biphenyl with N(III).