气候变化领域集成服务门户(CCPortal): Chemical characteristics and source apportionment of ambient PM1.0 and PM2.5 in a polluted city in North China plain

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DOI	10.1016/j.atmosenv.2020.117867
	Chemical characteristics and source apportionment of ambient PM1.0 and PM2.5 in a polluted city in North China plain
	Chen C.; Zhang H.; Li H.; Wu N.; Zhang Q.
发表日期	2020
ISSN	13522310
卷号	242
英文摘要	Handan is a heavily polluted city in the northern China. From 6 to December 31, 2015, PM1.0 and PM2.5 samples were synchronously collected for 23.5 h of each day at an urban site in Handan, to study the chemical composition and sources of aerosols present during wintertime in North China Plain (NCP). The average mass concentrations of PM1.0 and PM2.5 in Handan were as high as 189.2 μg/m3 and 252.4 μg/m3, while the average PM1.0/PM2.5 ratio was relatively low (74.6%) compared with the results in megacities. Overall, the chemical characteristics of PM1.0 and PM2.5 were quite similar during the campaign. During pollution episodes, SNA (sulphate, nitrate, and ammonium) ions were found dramatically increased, while the fraction of organic carbon (OC) and elemental carbon (EC) decreased in both PM1.0 and PM2.5. As a result of reduced photochemical reactions, the weights of secondary organic carbon (SOC) in PM1.0 and PM2.5 decreased during the pollution episode. Besides, liquid water content (LWC) were found effective for SNA formation. The positive matrix factorization (PMF) model identified similar sources distributions for PM1.0 and PM2.5, and the top three contributors were coal combustion, secondary inorganic aerosols, and industrial emissions. Moreover, the potential source contribution function (PSCF) demonstrated that regional sources in southern Handan might be crucial contributors to haze pollution in Handan. © 2020 Elsevier Ltd
英文关键词	Chemical characteristics; LWC; PM1.0/PM2.5; PMF; PSCF
语种	英语
scopus关键词	Aerosols; Coal combustion; Factorization; Industrial emissions; Organic carbon; Photochemical reactions; Sulfur compounds; Urban growth; Chemical characteristic; Chemical compositions; Liquid water content; Positive matrix factorization models; Potential source contribution function; Secondary inorganic aerosol; Secondary organic carbons (SOC); Source apportionment; Air pollution; ammonia; carbon; nitrate; organic carbon; sulfate; ambient air; atmospheric chemistry; atmospheric pollution; chemical composition; concentration (composition); elemental carbon; particulate matter; source apportionment; urban pollution; air pollution; air sampling; Article; chemical composition; China; city; combustion; comparative study; controlled study; haze; industrialization; molecular weight; particle size; particulate matter; photochemistry; priority journal; secondary organic aerosol; water content; China; Handan; Hebei; 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/144934
作者单位	Department of Earth System Science, Tsinghua University, Beijing, 100084, China; School of Environment, Tsinghua University, Beijing, 100084, China
推荐引用方式 GB/T 7714	Chen C.,Zhang H.,Li H.,et al. Chemical characteristics and source apportionment of ambient PM1.0 and PM2.5 in a polluted city in North China plain[J],2020,242.
APA	Chen C.,Zhang H.,Li H.,Wu N.,&Zhang Q..(2020).Chemical characteristics and source apportionment of ambient PM1.0 and PM2.5 in a polluted city in North China plain.Atmospheric Environment,242.
MLA	Chen C.,et al."Chemical characteristics and source apportionment of ambient PM1.0 and PM2.5 in a polluted city in North China plain".Atmospheric Environment 242(2020).