Atmospheric environment

Effect of illumination intensity and light application time on secondary organicaerosol formation from the photooxidation of -pinene

LIU Xianyun , ZHANG Weijun , HUANG Mingqiang , WANG Zhenya , HAO Liqing , ZHAO Wenwu


Received May 13, 2008,Revised July 08, 2008, Accepted , Available online

Volume 21,2009,Pages 447-451

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Secondary organic aerosol (SOA) formation from hydroxyl radical (OH.) initiated photooxidation of -pinene was investigated in a home-made smog chamber. The size distribution of SOA particles was measured using aerodynamic particle sizer spectrometer. The e ects of illumination intensity and light application time on SOA formation for -pinene were evaluated. Experimental results show that the concentration of SOA particles increased significantly with an increasing of illumination intensity, and the light application time, the concentration, and the size of SOA particles were also increased. In addition, the factors influencing the formation of SOA were discussed. In addition, this article compared the e ect of -pinene with that of toluene, and discussed the contribution of -pinene to SOA formation.

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