甲苯 C1 引发氧化生成二次有机气溶胶的粒径分布和化学成分。
Size distribution and chemical composition of secondary organic aerosol formed from C1-initiated oxidation of toluene.
机构信息
Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics & Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China.
出版信息
J Environ Sci (China). 2012;24(5):860-4. doi: 10.1016/s1001-0742(11)60840-1.
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.
甲苯的 C1 引发氧化生成的二次有机气溶胶（SOA）在自制的烟雾箱中进行了研究。气溶胶激光飞行时间质谱仪（ALTOFMS）分别采用空气动力学粒径谱仪和气溶胶激光飞行时间质谱仪（ALTOFMS）测量 SOA 粒子的粒径分布和化学成分。根据大量的单颗粒直径和质谱，从统计学上得到了 SOA 的粒径分布和化学成分。实验结果表明，甲苯的 C1 引发氧化生成的 SOA 粒子主要以细颗粒的形式存在，其直径小于 2.5 微米（即 PM2.5），并且乙二醛、苯甲醛、苯甲醇、苯醌、苯甲酸、苯甲基过氧化物和苯甲基硝酸酯是 SOA 中的主要产物成分。还提出了导致这些产物的可能反应机制。
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