气候变化领域集成服务门户(CCPortal): Nationwide increase of polycyclic aromatic hydrocarbons in ultrafine particles during winter over China revealed by size-segregated measurements

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DOI	10.5194/acp-20-14581-2020
	Nationwide increase of polycyclic aromatic hydrocarbons in ultrafine particles during winter over China revealed by size-segregated measurements
	Yu Q.; Ding X.; He Q.; Yang W.; Zhu M.; Li S.; Zhang R.; Shen R.; Zhang Y.; Bi X.; Wang Y.; Peng P.; Wang X.
发表日期	2020
ISSN	1680-7316
起始页码	14581
结束页码	14595
卷号	20 期号:23
英文摘要	Polycyclic aromatic hydrocarbons (PAHs) are toxic compounds in the atmosphere and have adverse effects on public health, especially through the inhalation of particulate matter (PM). At present, there is limited understanding of the size distribution of particulate-bound PAHs and their health risks on a continental scale. In this study, we carried out a PM campaign from October 2012 to September 2013 at 12 sampling sites simultaneously, including urban, suburban and remote sites in different regions of China. Size-segregated PAHs and typical tracers of coal combustion (picene), biomass burning (levoglucosan) and vehicle exhaust (hopanes) were measured. The annual averages of the 24 total measured PAHs (∑24PAHs) and benzo[a]pyrene (BaP) carcinogenic equivalent concentration (BaPeq/ ranged from 7.56 to 205 ng/m3 with a mean of 53.5 ng/m3 and from 0.21 to 22.2 ng/m3 with a mean of 5.02 ng/m3, respectively. At all the sites, ∑24PAHs and BaPeq were dominant in the ultrafine particles with aerodynamic diameter >1.1 um, followed by those in the size ranges of 1.1-3.3 um and <3.3 um. Compared with southern China, northern China witnessed much higher ∑24PAHs (87.36 vs. 17.56 ng/m3/, BaPeq (8.48 vs. 1.34 ng/m3/ and PAHs' inhalation cancer risk (7.410-4 vs. 1.210-4/. Nationwide increases in both PAH levels and inhalation cancer risk occurred in winter. The unfavorable meteorological conditions and enhanced emissions of coal combustion and biomass burning together led to severe PAHs' pollution and high cancer risk in the atmosphere of northern China, especially during winter. Coal combustion is the major source of BaPeq in all size particles at most sampling sites. Our results suggested that the reduction of coal and biofuel consumption in the residential sector could be crucial and effective in lowering PAH concentrations and their inhalation cancer risk in China. © Author(s) 2020.
英文关键词	cancer; coal combustion; concentration (composition); health risk; measurement method; PAH; particulate matter; size distribution; winter; China
语种	英语
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/168934
作者单位	State Key Laboratory of Organic Geochemistry and Guangdong, Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou, 510640, China; Guangdong Provincial Academy of Environmental Science, Guangzhou, 510045, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
推荐引用方式 GB/T 7714	Yu Q.,Ding X.,He Q.,et al. Nationwide increase of polycyclic aromatic hydrocarbons in ultrafine particles during winter over China revealed by size-segregated measurements[J],2020,20(23).
APA	Yu Q..,Ding X..,He Q..,Yang W..,Zhu M..,...&Wang X..(2020).Nationwide increase of polycyclic aromatic hydrocarbons in ultrafine particles during winter over China revealed by size-segregated measurements.Atmospheric Chemistry and Physics,20(23).
MLA	Yu Q.,et al."Nationwide increase of polycyclic aromatic hydrocarbons in ultrafine particles during winter over China revealed by size-segregated measurements".Atmospheric Chemistry and Physics 20.23(2020).