气候变化领域集成服务门户(CCPortal): Insights into the formation and properties of secondary organic aerosol at a background site in Yangtze River Delta region of China: Aqueous-phase processing vs. photochemical oxidation

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DOI	10.1016/j.atmosenv.2020.117716
	Insights into the formation and properties of secondary organic aerosol at a background site in Yangtze River Delta region of China: Aqueous-phase processing vs. photochemical oxidation
	Huang D.D.; Kong L.; Gao J.; Lou S.; Qiao L.; Zhou M.; Ma Y.; Zhu S.; Wang H.; Chen S.; Zeng L.; Huang C.
发表日期	2020
ISSN	13522310
卷号	239
英文摘要	Physicochemical processes leading to secondary organic aerosol (SOA) formation in rural Yangtze River Delta (YRD) are poorly constrained. We present observation results on chemical characteristics, sources and contributions from different formation routes of organic aerosol (OA) at a background site of YRD region in summer. High-resolution aerosol mass spectrometric analysis revealed that SOA dominated the total OA in rural YRD with a mass fraction of higher than 70%, emphasizing more significant impacts of secondary formation than primary emission on air quality in summer. Positive matrix factorization identified two SOA types that respectively associated with aqueous-phase processing (aqueous OOA) and photochemical oxidation (photochemical OOA). One foggy period with strong biomass burning influence (BB) and one clean period (Clean) with strong local influence were chosen for detailed analysis. Aqueous OOA and photochemical OOA had average mass ratios of 1.5:1 and 0.18:1 respectively for foggy-BB and Clean, suggesting the relative importance of different atmospheric processes on SOA formation under different environmental conditions. High OA concentrations (>15 μg/m3) were also associated with high fractional contributions from aqueous-phase processing in BB (40%) and photochemical processes in Clean (>60%). Furthermore, while aqueous-phase processing might promote the accumulation of OA, a better correlation between oxygenation levels of bulk OA with OX (O3+NO2) concentrations than that with aerosol liquid water content suggests that photochemical gas-phase oxidation imposed larger impacts on the degree of oxygenation of bulk OA. Our results highlight the combined effects of different chemical transformation pathways on local air quality and aerosol properties. © 2020 Elsevier Ltd
英文关键词	Aqueous-phase processing; Biomass burning; Photochemical oxidation; Secondary organic aerosol (SOA); Yangtze River Delta (YRD)
语种	英语
scopus关键词	Air quality; Factorization; Mass spectrometry; Oxidation; Oxygenation; Quality control; Rural areas; Aqueous-phase processing; Chemical characteristic; Chemical transformations; Environmental conditions; Photochemical oxidation; Physicochemical process; Positive Matrix Factorization; Secondary organic aerosols; Aerosols; aerosol; air quality; aqueous solution; biomass burning; concentration (composition); correlation; oxidation; physicochemical property; water content; air quality; Article; biomass; China; combustion; concentration (parameter); environmental impact; gas; liquid; mass spectrometry; oxygenation; photooxidation; physical chemistry; priority journal; river; rural area; secondary organic aerosol; summer; water content; China; Yangtze River
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144998
作者单位	State Environmental Protection Key Laboratory of Formation and Prevention of the Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai, 200233, China; School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China; School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China; State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
推荐引用方式 GB/T 7714	Huang D.D.,Kong L.,Gao J.,et al. Insights into the formation and properties of secondary organic aerosol at a background site in Yangtze River Delta region of China: Aqueous-phase processing vs. photochemical oxidation[J],2020,239.
APA	Huang D.D..,Kong L..,Gao J..,Lou S..,Qiao L..,...&Huang C..(2020).Insights into the formation and properties of secondary organic aerosol at a background site in Yangtze River Delta region of China: Aqueous-phase processing vs. photochemical oxidation.Atmospheric Environment,239.
MLA	Huang D.D.,et al."Insights into the formation and properties of secondary organic aerosol at a background site in Yangtze River Delta region of China: Aqueous-phase processing vs. photochemical oxidation".Atmospheric Environment 239(2020).