| Title: | Fate of Oxygenated Volatile Organic Compounds in the Yangtze River Delta Region: Source Contributions and Impacts on the Atmospheric Oxidation Capacity |
| Author(s): | Li J; Xie X; Li L; Wang X; Wang H; Jing S; Ying Q; Qin M; Hu J; |
| Address: | "Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing 210044, China. State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai 200233, China. Zachry Department of Civil and Environmental Engineering, Texas A&M University, College Station, Texas 77843-3136, United States" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "The Community Multiscale Air Quality model (CMAQv5.2) was implemented to investigate the sources and sinks of oxygenated volatile organic compounds (OVOCs) during a high O(3) and high PM(2.5) season in the Yangtze River Delta (YRD) region, based on constraints from observations. The model tends to overpredict non-oxygenated VOCs and underpredict OVOCs, which has been improved with adjusted emissions of all VOCs. The OVOCs in the YRD are dominated by ketones, aldehydes, and alcohols. Ketones and aldehydes mainly originate from direct emissions and secondary formation in the northern YRD, and primarily originate from secondary formation in the southern part influenced by biogenic emissions. The concentration of secondary organic aerosols (SOA) produced by OVOCs is 0.5-1.5 mug/m(3), with 40-80% originated from organic nitrates, 20-70% originated from dicarbonyls, and 0-20% originated from isoprene epoxydiols. The influences of OVOCs on the atmospheric oxidation capacity are dominated by the OH(*) pathway during the day ( approximately 350%) and by the NO(3)(*) pathway at night ( approximately 150%). Consequently, O(3) is enhanced by 30-70% in the YRD. Aerosols are also enhanced by 50-140%, 20-80%, and approximately 20% for SOA, nitrate, and sulfate, respectively" |
| Keywords: | Aerosols/analysis *Air Pollutants/analysis Aldehydes China Environmental Monitoring Ketones *Ozone/analysis *Volatile Organic Compounds atmospheric oxidation capacity fine particulate matter oxygenated volatile organic compounds ozone secondary organic ae; |
| Notes: | "MedlineLi, Jingyi Xie, Xiaodong Li, Lin Wang, Xueying Wang, Hongli Jing, Sheng'ao Ying, Qi Qin, Momei Hu, Jianlin eng Research Support, Non-U.S. Gov't 2022/08/05 Environ Sci Technol. 2022 Aug 16; 56(16):11212-11224. doi: 10.1021/acs.est.2c00038. Epub 2022 Aug 4" |
