DOI: 10.1016/j.atmosenv.2017.03.011
Scopus记录号: 2-s2.0-85015356980
论文题名: Photochemical reaction between triclosan and nitrous acid in the atmospheric aqueous environment
作者: Ma J ; , Zhu C ; , Lu J ; , Lei Y ; , Wang J ; , Chen T
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 157 起始页码: 38
结束页码: 48
语种: 英语
英文关键词: Atmospheric aqueous-phase
; Laser flash photolysis
; Nitrous acid
; Transient absorption
; Triclosan
Scopus关键词: Atmospheric chemistry
; Atmospheric humidity
; Chromatography
; Ethers
; Gas chromatography
; Mass spectrometry
; Nitration
; Photochemical reactions
; Photodissociation
; Photolysis
; Rate constants
; Solutions
; Spectrometry
; Aqueous phase
; Laser flash photolysis
; Nitrous acid
; Transient absorption
; Triclosan
; Inorganic acids
; aromatic compound
; benzene
; ether
; nitro derivative
; nitrous acid
; triclosan
; water
; absorption
; atmospheric chemistry
; atmospheric gas
; chemical bonding
; chemical pollutant
; hydrocarbon
; hydroxyl radical
; nitrite
; photochemistry
; photolysis
; troposphere
; aqueous solution
; Article
; atmosphere
; chemical reaction
; chemical structure
; humidity
; laser flash photolysis spectrometry
; mass fragmentography
; photochemistry
; photolysis
; photoreactivity
; priority journal
; rate constant
; reaction analysis
; spectrometry
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Nitrous acid (HONO) is an important tropospheric pollutant and a major source of hydroxyl radical in the atmospheric gas phase. However, studies on the role of HONO in atmospheric aqueous phase chemistry processes are relatively few. The present work investigated the photochemical reaction of HONO with triclosan (TCS), which is an emerging contaminant, using a combination of laser flash photolysis spectrometry and gas chromatography mass spectrometry. With these techniques, the reaction pathway of HONO with TCS was proposed by directly monitoring the transient species and detecting the stable products. ·OH was generated from the photodissociation of the HONO aqueous solution and attacked TCS molecules on different sites to produce the TCS-OH adducts with a second-order rate constant of 1.11 × 109 L mol−1 s−1. The ·OH added a C atom adjacent to the ether bond in the aromatic ring of TCS and self-decayed when the ether bond broke. The intermediates generated from the addition of ·OH to the benzene ring of the TCS molecular structure were immediately nitrated by HONO, which played a key role in the formation process of nitrocompounds. An atmospheric model suggests that the aqueous oxidation of TCS by ·OH is a major reaction at high liquid water concentrations, and the photolysis of TCS dominates under low-humidity conditions. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82321
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: School of Resource and Environmental Engineering, Hefei University of Technology, Hefei, China; Institute of Atmospheric Environment & Pollution Control, Hefei University of Technology, Hefei, China; Center of Analysis & Measurement, Hefei University of Technology, Hefei, China
Recommended Citation:
Ma J,, Zhu C,, Lu J,et al. Photochemical reaction between triclosan and nitrous acid in the atmospheric aqueous environment[J]. Atmospheric Environment,2017-01-01,157