- 作者: 黃明強,張為俊,郝立慶,王振亞,周留柱,顧學軍,方黎
- 作者服務機構: Laboratory of Environment Spectroscopy, Anhui Institute of Optics & Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, P. R. China
- 中文摘要: A laboratory study was carried out to investigate the secondary organic aerosol (SOA) products from photooxidation of the aromatic hydrocarbon toluene. The experiments were conducted by irradiating toluene/CH3ONO/NO/air mixtures in a home-made smog chamber. The aerosol time-of-flight mass spectrometer (ATOFMS) was used to measure the size and the chemical composition of individual secondary organic aerosol particles in real-time. According to a large number of single aerosol diameters and mass spectra, we obtained the size distribution and chemical composition of SOA statistically. Expeperimental results showed that aerosol created by toluene photooxidation is predominantly in the form of fine particles, which have diameters less than 2.5 mm (i.e. PM2.5), and the predominant components of aerosol are furane, methyl glyoxylic acid, phenol, benzaldehyde, benzyl alcohol, cresol, 3-hydroxy-2,4-dioxo-pentanal, methyl nitrophenol, and 5-hydroxy-4,6-dioxo-2-heptenal. The possible reaction mechanisms leading to these products were also discussed.
- 英文摘要: --
- 中文關鍵字: Toluene; Secondary organic aerosol; Smog chamber; Laser desorption/ionization; Reaction mechanisms.
- 英文關鍵字: --