title: Photochemical reaction between biphenyl and N(III) in the atmospheric aqueous phase.
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 H2ONO+(k1), HONO (k2) and NO2-(k3) were k1= (0.058 ± 0.005 L mol-1s-1), k2= (0.12 ± 0.06 L mol-1s-1) and k3= (0.0019 ± 0.0003 L mol-1s-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 × 109L mol-1s-1. The products analysis suggested that Bp-OH adduct could be nitrated by N (III) and NO2to generate nitro-compounds.
authors.affiliation: School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, PR China; Institute of Atmospheric Environment & Pollution Control, Hefei University of Technology, Hefei 230009, PR China.
authors.forename: Jianzhong
authors.initials: J
authors.lastname: Ma
authors.affiliation: School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, PR China; Institute of Atmospheric Environment & Pollution Control, Hefei University of Technology, Hefei 230009, PR China. Electronic address: czzhu@hfut.edu.cn.
authors.forename: Chengzhu
authors.initials: C
authors.lastname: Zhu
authors.affiliation: Center of Analysis & Measurement, Hefei University of Technology, Hefei 230009, PR China.
authors.forename: Jun
authors.initials: J
authors.lastname: Lu
authors.affiliation: School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, PR China; Institute of Atmospheric Environment & Pollution Control, Hefei University of Technology, Hefei 230009, PR China.
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.affiliation: School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, PR China.
authors.forename: Shuheng
authors.initials: S
authors.lastname: Hu
authors.affiliation: School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, PR China.
authors.forename: Tianhu
authors.initials: T
authors.lastname: Chen
mesh_terms: D000336:Aerosols; D000393:Air Pollutants / Q000737:chemistry* / Q000528:radiation effects; D001713:Biphenyl Compounds / Q000737:chemistry* / Q000528:radiation effects; D017665:Hydroxyl Radical / Q000737:chemistry; D007834:Lasers; D009608:Nitrous Acid / Q000737:chemistry* / Q000528:radiation effects; D010084:Oxidation-Reduction; D055668:Photochemical Processes; D010782:Photolysis; D014466:Ultraviolet Rays; D014867:Water / Q000737:chemistry*
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D001713:Biphenyl Compounds; D014867:Water; D017665:Hydroxyl Radical; D009608:Nitrous Acid
keywords: Atmospheric aqueous phase; Biphenyl; Hydroxyl radical; N(III); Photochemistry