Size distribution and chemical composition of secondary organic aerosol formed from C1-initiated oxidation of toluene.
Secondary organic aerosol (SOA) formed from C1-initiated oxidation of toluene was investigated in a home-made smog chamber. The size distribution and chemical composition of SOA particles were measured using aerodynamic particle sizer spectrometer and the aerosol laser time-of-flight mass spectrometer (ALTOFMS), respectively. According to a large number of single aerosol diameter and mass spectra, the size distribution and chemical composition of SOA were obtained statistically. Experimental results showed that SOA particles created by C1-initiated oxidation of toluene is predominantly in the form of fine particles, which have diameters less than 2.5 microm (i.e., PM2.5), and glyoxal, benzaldehyde, benzyl alcohol, benzoquinone, benzoic acid, benzyl hydroperoxide and benzyl methyl nitrate are the major products components in the SOA. The possible reaction mechanisms leading to these products are also proposed.
Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics & Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China. huangmingqiang@gmail.com
Mingqiang
M
Huang
Weijun
W
Zhang
Xuejun
X
Gu
Changjin
C
Hu
Weixiong
W
Zhao
Zhenya
Z
Wang
Li
L
Fang
D000336:Aerosols / Q000737:chemistry*; D002712:Chlorides / Q000737:chemistry*; D007834:Lasers; D008027:Light; D013058:Mass Spectrometry; D009930:Organic Chemicals / Q000737:chemistry*; D010084:Oxidation-Reduction / Q000528:radiation effects; D010316:Particle Size; D013997:Time Factors; D014050:Toluene / Q000737:chemistry*
D000336:Aerosols; D002712:Chlorides; D009930:Organic Chemicals; D014050:Toluene