Effect of Illumination on Secondary Organic Aerosol Formation from Ozonolysis of Limonene

Abstract

Abstract:

As an important biogenic volatile organic compound, ozonolysis of limonene is a significant source of atmospheric secondary organic aerosol (SOA). Quantitative research on ozonolysis of limonene was reported under both dark and UV-illuminated conditions in the self-made smog chamber. The time evolutions of limonene precursor, SOA mass concentration as well as SOA particle size distributions were investigated continuously, and the yield of SOA was analyzed according to the gas/particle partitioning theory. It is shown that exposure to UV light reduces SOA yield by 10%~16% under corresponding conditions, and it is proposed that gas-phase photolysis of some intermediate or final products may play a key role in the decline of yields in the presence of UV light.

Key words: illumination, limonene, ozonolysis, secondary organic aerosol, smog chamber

CLC Number:

X513

LIU Zhi, HU Chang-Jin, CHENG Yue, PAN Gang, ZHENG Xiao-Hong, GU Xue-Jun, ZHAO Wei-Xiong, ZHANG Wei-Jun. Effect of Illumination on Secondary Organic Aerosol Formation from Ozonolysis of Limonene[J]. Journal of Atmospheric and Environmental Optics, 2012, (5): 348-357.

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