气候变化领域集成服务门户(CCPortal): Evolution of source contributions during heavy fine particulate matter (PM2.5) pollution episodes in eastern China through online measurements

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DOI	10.1016/j.atmosenv.2020.117569
	Evolution of source contributions during heavy fine particulate matter (PM2.5) pollution episodes in eastern China through online measurements
	Shen J.; Zhao Q.; Cheng Z.; Huo J.; Zhu W.; Zhang Y.; Duan Y.; Wang X.; Antony Chen L.-W.; Fu Q.
发表日期	2020
ISSN	1352-2310
卷号	232
英文摘要	Ambient heavy fine particulate matter (PM2.5) pollution events occur frequently during winter seasons in eastern China. Investigating the evolution of source contributions during heavy pollution episodes is critical for strategies of pollution relief. In this study, a two-month field campaign was conducted in the winters of 2015 and 2016 at a regional supersite in eastern China and over one thousand hourly online measurements for twenty PM2.5 species were obtained. Hourly source apportionment for the total mass of PM2.5, and its major species (primary organic carbon, elemental carbon, nitrate, sulfate and ammonium), were then performed by Positive Matrix Factorization (PMF) and Multilinear Engine-2 (ME2) models. Three PM2.5 heavy pollution episodes including ten high concentration peaks were identified for further analysis. Results showed that ME2 performed better than PMF by fixing source profiles of secondary nitrate, secondary sulfate and sea salt, although they have dominant consistencies. Two types of pollution sources were identified from high PM2.5 mass peaks: coal combustion-oriented responsible for four peaks and secondary inorganic aerosol-oriented responsible for the remaining six peaks. Low wind speed and planetary boundary layer favorited the coal combustion-oriented peaks, but also weakened the secondary inorganic formation due to low temperature and accumulated nitric oxide. Primary emissions from coal combustion can contribute 18% to ammonium in addition to 72% from secondary inorganic aerosol. Secondary organic aerosol would contribute 20% of PM2.5 mass during the heaviest episodes. Findings in this study provide insights into the causes of heavy pollution episodes and support implementing effective control strategies to mitigate heavy pollution events in eastern China. © 2020 Elsevier Ltd
关键词	Chemical components Fine particulate matter (PM2.5)Heavy pollution events Receptor model Source apportionment
语种	英语
scopus关键词	Aerosols; Boundary layers; Coal; Coal combustion; Factorization; Nitrates; Nitric oxide; Organic carbon; Pollution control; Sulfur compounds; Temperature; Wind; Fine particulate matter (PM2.5); Planetary boundary layers; Positive Matrix Factorization; Primary organic carbons; Secondary inorganic aerosol; Secondary organic aerosols; Source apportionment; Source contributions; Particles (particulate matter); ammonia; barium ion; calcium ion; carbon; carbon monoxide; chromium; coal; iron; lead; manganese; nickel; nitrate; nitric oxide; nitrogen oxide; organic carbon; selenium; sodium chloride; sulfate; sulfur dioxide; zinc ion; atmospheric pollution; coal combustion; episodic event; measurement method; particulate matter; source apportionment; strategic approach; aerosol; air pollution; Article; blind source separation; boundary layer; China; combustion; concentration process; control strategy; environmental monitoring; exhaust gas; low temperature; meteorological phenomena; molecular evolution; multilinear engine 2; online analysis; particulate matter; positive matrix factorization; priority journal; seasonal variation; secondary organic aerosol; wind speed; winter; China
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/249129
作者单位	School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Shanghai Environmental Monitoring Center, Shanghai, 200235, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China; Division of Atmospheric Sciences, Desert Research Institute, 2215 Raggio Parkway, Reno, NV 89512, United States; Department of Environmental and Occupational Health, School of Public Health, University of Nevada, Las Vegas, NV 89154, United States
推荐引用方式 GB/T 7714	Shen J.,Zhao Q.,Cheng Z.,et al. Evolution of source contributions during heavy fine particulate matter (PM2.5) pollution episodes in eastern China through online measurements[J],2020,232.
APA	Shen J..,Zhao Q..,Cheng Z..,Huo J..,Zhu W..,...&Fu Q..(2020).Evolution of source contributions during heavy fine particulate matter (PM2.5) pollution episodes in eastern China through online measurements.ATMOSPHERIC ENVIRONMENT,232.
MLA	Shen J.,et al."Evolution of source contributions during heavy fine particulate matter (PM2.5) pollution episodes in eastern China through online measurements".ATMOSPHERIC ENVIRONMENT 232(2020).