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DOI	10.1016/j.atmosres.2020.105374
	Insights into the characteristics of aerosols using an integrated single particle–bulk chemical approach
	Zhang J.; Huang X.; Yu Y.; Liu Q.; Zhang J.; Song H.; Wang Y.
发表日期	2020
ISSN	0169-8095
英文摘要	Single particle analysis and bulk chemical analysis are two complementary approaches used to study aerosols from different perspectives. Most previously published studies have been based on only one of these two approaches, which has limited our understanding of particle pollution. We therefore integrated the single particle (single particle aerosol mass spectrometer) and bulk chemical (filter sampling) approaches to sample and analyze PM2.5 pollution in Chengdu, a megacity in Southwest China, during the autumn season. Our results showed that there was a strong correlation between the results obtained by the two approaches. Seven major particle types (vehicular emissions, biomass burning, coal combustion, K with sulfate, K with nitrate, K with secondary inorganic species and dust particles) were resolved, corresponding to the different chemical components measured by filter sampling. Two different pollution episodes were identified. Pollution episode 1 was caused by combustion sources (coal and biomass), whereas pollution episode 2 was caused by a combination of local vehicular emissions and regional transport from regions to the east and south of Chengdu. Integrated single particle and bulk chemical analysis can determine the sources and formation mechanisms of pollution more efficiently than either one of these methods used alone. Bivariate polar plots showed that in addition to SO2, local emissions were the dominant source of all species. Regional transport was usually from areas located to the southwest or northeast of Chengdu. Six sources of PM2.5 were apportioned based on positive matrix factorization: Combustion (16.1%), vehicular emissions (26.5%), soil dust (4.5%), industrial processes (12.2%), secondary nitrate (18.6%) and secondary sulfate (22.1%) © 2020 Elsevier B.V.
英文关键词	Formation mechanisms; PM2.5; Pollution episodes; Source apportionment; SPAMS
语种	英语
scopus关键词	Aerosols; Chemical analysis; Coal combustion; Coal dust; Factorization; Industrial emissions; Nitrates; Sulfur dioxide; Aerosol mass spectrometers; Bulk chemical analysis; Formation mechanism; Industrial processs; Positive Matrix Factorization; Regional transport; Single-particle analysis; Vehicular emission; Air pollution
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162327
作者单位	Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China; Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, 610225, China; Shandong Academy for Environmental Planning, Jinan, 250101, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
推荐引用方式 GB/T 7714	Zhang J.,Huang X.,Yu Y.,等. Insights into the characteristics of aerosols using an integrated single particle–bulk chemical approach[J],2020.
APA	Zhang J..,Huang X..,Yu Y..,Liu Q..,Zhang J..,...&Wang Y..(2020).Insights into the characteristics of aerosols using an integrated single particle–bulk chemical approach.Atmospheric Research.
MLA	Zhang J.,et al."Insights into the characteristics of aerosols using an integrated single particle–bulk chemical approach".Atmospheric Research (2020).