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- Title
Characteristics and Causes of a Typical Ozone Pollution Process in Ezhou.
- Authors
YANG Nuo; XU Yong; ZHANG Huili; YE Xinsheng; JI Xiang; PAN Guosheng
- Abstract
To investigate the characteristics and causes of ozone pollution in Ezhou from September 1 to 14, 2022, variety of monitoring data and analysis methods were applied, including routine monitoring of ambient air quality, online monitoring of volatile organic compounds (VOCs), OBM model, PMF model, cluster analysis of air mass backward trajectory, maximum incremental reactivity method (MIR). The results showed that this was a regional ozone pollution process, and the pollution degree was mainly light pollution. O3 hourly concentration showed a typical single-peak curve, and 13-00-16-00 is the peak time of ozone concentration. During the study period, the average concentration of VOCs was 19.15x10-9, and the concentration of VOCs in the pollution stage was significantly higher than that in the stages of accumulation and contamination. The main components of VOCs were alkanes, OVOCs, and halohydrocarbons. The OFPs of VOCs components in the stages of accumulation-pollution and contamination were 48.63, 89.07, and 45.43 μg/m3, respectively, and ethylene was the species that contributes the most to OFP. The downdraft around the typhoon and the high temperature, low humidity, and static and stable meteorological conditions were important external factors for the generation and transformation of O3. The ozone pollution was mainly caused by the local generation, and at the same time affected by the transmission in the north. The main source of VOCs in the pollution stage was industrial emission sources (36.8%), motor vehicle exhaust emission sources (18.3%), fossil fuel combustion sources (14.9%), solvent use sources (12.9%) and gasoline volatilization sources (9.8%), natural sources (7.3%), the source of solvent usage contributed the most to OFP.
- Subjects
AIR quality monitoring; OZONE; EMISSIONS (Air pollution); GASOLINE; POLLUTION; LIGHT pollution; TROPOSPHERIC ozone; OZONE generators; AIR quality standards
- Publication
Environmental Science & Technology (10036504), 2023, Vol 46, Issue 6, p136
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.2642.22.338