The characteristics of VOCs and ozone formation sensitivity in a typical industrial area in Shenzhen
YU Guang-he1, LIN Li-liang2, XIA Shi-yong3, ZHU Bo3, HUANG Xiao-feng3
1. Peking University-Hong Kong University of Science and Technology Shenzhen-Hong Kong Institution, Shenzhen 518057, China; 2. China Southern Grid Power Technology Co., Ltd., Guangzhou 510080, China; 3. Laboratory of Atmospheric Observation Supersite, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
Abstract:VOCs were sampled online in a typical industrial area in north of Shenzhen from September to October 2020 to analyze the VOCs polluted and used the Observation-Based-Model (OBM) to study the O3 formation sensitivity. During the sampling, the average mixing ratio of TVOCs was about 48.5×10-9, and alkane was the most abundant species, followed by oxygenated volatile organic compounds (OVOCs), halohydrocarbon, aromatic, alkene, acetylene and acetonitrile. The average ozone formation potential (OFP) of TVOCs was 320μg/m3, among which aromatic, OVOCs and alkane contributed most, and OFP contributed by these three categories exceeded 90%. The diurnal variation of ethene and benzene shown “two peaks and one valley” pattern, mainly contributed by vehicle exhaust. The result of relative incremental reactivity (RIR) analysis indicated that reducing anthropogenic VOCs was most effective method for local O3 formation, and aromatics should be controlled first; empirical kinetics modeling approach curve (EKMA) revealed that the local O3 formation was in the transition area. While carrying out VOCs regional joint control, it is also necessary to carry out strong local NOx control to strengthen the long-term controlling of O3 in this area.
于广河, 林理量, 夏士勇, 朱波, 黄晓锋. 深圳市工业区VOCs污染特征与臭氧生成敏感性[J]. 中国环境科学, 2022, 42(5): 1994-2001.
YU Guang-he, LIN Li-liang, XIA Shi-yong, ZHU Bo, HUANG Xiao-feng. The characteristics of VOCs and ozone formation sensitivity in a typical industrial area in Shenzhen. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(5): 1994-2001.
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