Characteristics, Sources, and Contributions to Ozone Formation of Ambient Volatile Organic Compounds in Huanggang, China

被引：0
|
作者：
Lian S.-Z. [1 ]
Deng M.-J. [1 ]
Chen N. [2 ]
Wang Y.-Y. [1 ]
Tao H.-T. [1 ]
Cheng H.-R. [1 ]
机构：
[1] School of Resource and Environment Science, Wuhan University, Wuhan
[2] Eco-Environment Monitoring Centre of Hubei Province, Wuhan
来源：
Huanjing Kexue/Environmental Science | 2023年 / 44卷 / 10期
关键词：
EKMA curve; ozone formation sensitivities; PMF model; relative incremental reactivity (RIR); volatile organic compounds (VOCs);
D O I：
10.13227/j.hjkx.202211001
中图分类号：
学科分类号：
摘要：
Based on the offline sampling data of volatile organic compounds (VOCs) and the simultaneous online measurements of conventional gaseous air pollutants and meteorological parameters in urban Huanggang, the volume fractions and component characteristics of VOCs were analyzed. The sources and ozone (O3 ) formation sensitivity of VOCs during severe ozone pollution episodes were analyzed using the positive matrix factorization (PMF) model and the photochemical box model coupled with master chemical mechanism (PBM-MCM), respectively. The results revealed that the average volume fractions of total volatile organic compounds were (21. 57 ± 3. 13) × 10 - 9 , with higher volume fractions in winter and spring compared to those in summer and autumn. Among these, alkanes (49. 9%) and alkenes (16. 4%) accounted for the highest proportion. The PMF analysis results showed that fuel combustion (27. 8%), vehicle emission (19. 9%), solvent use (15. 7%), industrial halogenated hydrocarbon emission (12. 1%), chemical enterprise emission (10. 5%), natural sources (7. 8%), and diesel vehicle emission (6. 2%) were the main sources of VOC emissions. Anthropogenic VOCs emitted by solvent use, fuel combustion, and chemical enterprises contributed significantly (60. 9% in total) to generating O3 , which indicates that these three types of anthropogenic sources should be controlled first when it comes to preventing and controlling ozone pollution. Further, the relative incremental reactivity (RIR) and empirical kinetic method approach (EKMA) revealed that O3 formation was in a VOCs-limited regime during the observation period in Huanggang, China. Furthermore, O3 formation was more sensitive to m-xylene, p-xylene, ethylene, 1-butene, and toluene; therefore, reducing these VOCs should be prioritized. © 2023 Science Press. All rights reserved.
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页码：5410 / 5417
页数：7
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