气候变化领域集成服务门户(CCPortal): The roles of aqueous-phase chemistry and photochemical oxidation in oxygenated organic aerosols formation

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DOI	10.1016/j.atmosenv.2021.118738
	The roles of aqueous-phase chemistry and photochemical oxidation in oxygenated organic aerosols formation
	Zhan B.; Zhong H.; Chen H.; Chen Y.; Li X.; Wang L.; Wang X.; Mu Y.; Huang R.-J.; George C.; Chen J.
发表日期	2021
ISSN	1352-2310
卷号	266
英文摘要	The formation mechanism and evolution process of secondary organic aerosol (SOA) remain poorly understood due to measurement uncertainties and chemical complexities. Here, we present the characterization of non-refractory fine particles (NR-PM2.5) analyzed by means of a time-of-flight ACSM (ToF-ACSM) at a rural site in the North China Plain during winter. Our results show that air quality in rural areas was heavily polluted by primary organic aerosols (POA), which accounted for 83% of total organic aerosol (OA). The oxygenated organic aerosols (OOA) were mainly generated from local emissions. As pieces of evidence, firstly, less-oxidized OOA (LO-OOA) had good correlations with primary species like biomass burning OA (BBOA) (R2 = 0.54), EC (R2 = 0.46), and chloride (R2 = 0.46), implying LO-OOA was formed with the POA emission processes; secondly, there was a significant increase in OOA concentration after sunrise, indicating a lot of local generation during the daytime; thirdly, the potential source region of OOA was restricted in that of POA, implying that OOAs were converted from where primary emission exists. The formation processes of LO-OOA and more-oxidized OOA (MO-OOA) are different. Aqueous-phase chemistry had a dominant effect on the formation of LO-OOA due to the better correlation between aerosol liquid water content (ALWC) with LO-OOA (R2 = 0.54) than MO-OOA (R2 = 0.15). In comparison, both aqueous-phase and photochemical processes acted on the MO-OOA formation, when odd oxygen (Ox = O3+NO2) was low (Ox < 35 ppb), MO-OOA concentration increased with the increment of ALWC. However, at high Ox level (Ox > 35 ppb), photochemical oxidation played an essential role in MO-OOA formation. © 2021 Elsevier Ltd
关键词	Chemical composition Fine particles Mass-spectrometry Organic aerosol Real-time measurements The north China Plain ToF-ACSM
语种	英语
scopus关键词	Aerosols; Air quality; Chlorine compounds; Mass spectrometry; Rural areas; Uncertainty analysis; Aqueous phasis; Chemical compositions; Fine-particles; Organic aerosol; Oxygenated organics; Real time measurements; The north china plain; Time-of flight; Time-of-flight ACSM; Oxidation; ammonia; chloride; nitrate; nitric oxide; oxygen; sulfate; aerosol; air quality; aqueous solution; concentration (composition); formation mechanism; oxidant; oxidation; photochemistry; aerosol; air pollution; air quality; Article; China; circadian rhythm; combustion; controlled study; environmental temperature; humidity; mass spectrometry; meteorology; oxygenation; particulate matter 2.5; photochemistry; photooxidation; rural area; solar radiation; summer; time of flight mass spectrometry; urban area; water content; wind speed; winter; China; North China Plain
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/248200
作者单位	Department of Atmospheric and Oceanic Sciences, Institute of Atmospheric Sciences, Fudan University, Shanghai, 200438, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science & Engineering, Fudan University, Shanghai, 200438, China; State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Center for Excellence in Quaternary Science and Global Change, and Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, Villeurbanne, F-69626, France; Institute of Eco-Environment, University of Chinese Academy of Sciences, Beijing, 100080, China; IRDR International Center of Excellence on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health, Institute of Atmospheric Sciences, Fudan University, Shanghai, 20...
推荐引用方式 GB/T 7714	Zhan B.,Zhong H.,Chen H.,et al. The roles of aqueous-phase chemistry and photochemical oxidation in oxygenated organic aerosols formation[J],2021,266.
APA	Zhan B..,Zhong H..,Chen H..,Chen Y..,Li X..,...&Chen J..(2021).The roles of aqueous-phase chemistry and photochemical oxidation in oxygenated organic aerosols formation.ATMOSPHERIC ENVIRONMENT,266.
MLA	Zhan B.,et al."The roles of aqueous-phase chemistry and photochemical oxidation in oxygenated organic aerosols formation".ATMOSPHERIC ENVIRONMENT 266(2021).