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Environ Pollut

Title:		"Summer O(3) pollution cycle characteristics and VOCs sources in a central city of Beijing-Tianjin-Hebei area, China"
Author(s):		Guan Y; Liu X; Zheng Z; Dai Y; Du G; Han J; Hou L; Duan E;
Address:		"School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China; National Joint Local Engineering Research Center for Volatile Organic Compounds and Odorous Pollution Control, Shijiazhuang, 050018, China. School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China. Baiyangdian River Basin Ecological Environment Guarantee Center, Shijiazhuang, 050018, China. Hebei Province Ecological Environment Monitoring Center, Shijiazhuang, 050018, China. Hebei Province Ecological Environment Emergency and Heavy Pollution Weather Forewarning Center, Shijiazhuang, 050018, China. School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China; National Joint Local Engineering Research Center for Volatile Organic Compounds and Odorous Pollution Control, Shijiazhuang, 050018, China. Electronic address: hgxhjj@163.com. 96911 Unit, Beijing, 100011, China"
Journal Title:		Environ Pollut
Year:		2023
Volume:		20230215
Issue:
Page Number:		121293 -
DOI:		10.1016/j.envpol.2023.121293
ISSN/ISBN:		1873-6424 (Electronic) 0269-7491 (Linking)
Abstract:		"One of the major pollutants influencing urban air quality in China is O(3). O(3) is the second most important pollutant affecting air quality in Shijiazhuang, which is the third largest city in the Beijing-Tianjin-Hebei area and the provincial capital of Hebei province. To fully understand the characteristics of O(3) and volatile organic compounds (VOCs), which are O(3) precursors, and the role of VOCs to ozone formation, we measured the hourly concentrations of O(3) and 85 VOCs in Shijiazhuang continuously from January to November 2020, and the concentration characteristics of both together with the chemical reactivity and sources of VOCs were analyzed from a seasonal perspective. The O(3) concentration in Shijiazhuang showed a phenomenon of high summer and low winter, and the VOCs showed a phenomenon of high winter and low spring. In the summer when the O(3) exceedance rate is the highest, the time-domain variation characteristics of O(3) were analyzed by wavelet analysis model, and the main periods controlling the O(3) concentration variation in Shijiazhuang in summer 2020 were 52 days, 32 days, 19 days and 12 days. The maximum incremental reactivity (MIR) and propylene equivalence method indicated ethene, propylene and 1-pentene were common substances in the top five species of each season. The T/B, Iso-p/N-p, Iso-p/E, N-p/E, and positive matrix factorization (PMF) model showed that industrial source (18.62%-22.03%) and vehicle emission (13.20%-17.69%) were the major VOCs sources in Shijiazhuang. Therefore, to control the O(3) concentration in Shijiazhuang, it is necessary to decrease alkenes emissions as well as VOCs from industrial source and vehicle emission"
Keywords:		Beijing Vehicle Emissions/analysis *Air Pollutants/analysis *Volatile Organic Compounds/analysis Seasons Urbanization China *Ozone/analysis Environmental Monitoring Ozone pollution periodization Positive matrix factorization Source apportionment VOCs;
Notes:		"MedlineGuan, Yanan Liu, Xuejiao Zheng, Zhiyang Dai, Yanwei Du, Guimin Han, Jing Hou, Li'an Duan, Erhong eng England 2023/02/23 Environ Pollut. 2023 Apr 15; 323:121293. doi: 10.1016/j.envpol.2023.121293. Epub 2023 Feb 15"