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DOI	10.5194/acp-19-8741-2019
	Variability of polycyclic aromatic hydrocarbons and their oxidative derivatives in wintertime Beijing; China
	Elzein A.; Dunmore R.E.; Ward M.W.; Hamilton J.F.; Lewis A.C.
发表日期	2019
ISSN	16807316
起始页码	8741
结束页码	8758
卷号	19 期号:13
英文摘要	Ambient particulate matter (PM) can contain a mix of different toxic species derived from a wide variety of sources. This study quantifies the diurnal variation and nocturnal abundance of 16 polycyclic aromatic hydrocarbons (PAHs), 10 oxygenated PAHs (OPAHs) and 9 nitrated PAHs (NPAHs) in ambient PM in central Beijing during winter. Target compounds were identified and quantified using gas chromatography-time-of-flight mass spectrometry (GC-Q-ToF-MS). The total concentration of PAHs varied between 18 and 297 ngm-3 over 3 h daytime filter samples and from 23 to 165 ngm-3 in 15 h night-time samples. The total concentrations of PAHs over 24 h varied between 37 and 180 ngm-3 (mean: 97±43 ngm-3). The total daytime concentrations during high particulate loading conditions for PAHs, OPAHs and NPAHs were 224, 54 and 2.3 ngm-3, respectively. The most abundant PAHs were fluoranthene (33 ngm-3), chrysene (27 ngm-3), pyrene (27 ngm-3), benzo[a]pyrene (27 ngm-3), benzo[b]fluoranthene (25 ngm-3), benzo[a]anthracene (20 ngm-3) and phenanthrene (18 ngm-3). The most abundant OPAHs were 9,10-anthraquinone (18 ngm-3), 1,8-naphthalic anhydride (14 ngm-3) and 9-fluorenone (12 ngm-3), and the three most abundant NPAHs were 9-nitroanthracene (0.84 ngm-3), 3-nitrofluoranthene (0.78 ngm-3) and 3-nitrodibenzofuran (0.45 ngm-3). Σ PAHs and Σ OPAHs showed a strong positive correlation with the gas-phase abundance of NO, CO, SO2 and HONO, indicating that PAHs and OPAHs can be associated with both local and regional emissions. Diagnostic ratios suggested emissions from traffic road and coal combustion were the predominant sources of PAHs in Beijing and also revealed the main source of NPAHs to be secondary photochemical formation rather than primary emissions. PM2.5 and NPAHs showed a strong correlation with gas-phase HONO. 9- Nitroanthracene appeared to undergo a photodegradation during the daytime and showed a strong positive correlation with ambient HONO (R D 0:90, P <0:001). The lifetime excess lung cancer risk for those species that have available toxicological data (16 PAHs, 1 OPAH and 6 NPAHs) was calculated to be in the range 10-5 to 10-3 (risk per million people ranges from 26 to 2053 cases per year). © 2019 Author(s). This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	air quality; anthropogenic source; atmospheric pollution; carbon emission; concentration (composition); health risk; PAH; particulate matter; pollution exposure; public health; traffic emission; winter; Beijing [China]; China; Lamprididae
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/144294
作者单位	Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, YO10 5DD, United Kingdom; National Centre for Atmospheric Science, University of York, York, YO10 5DD, United Kingdom
推荐引用方式 GB/T 7714	Elzein A.,Dunmore R.E.,Ward M.W.,et al. Variability of polycyclic aromatic hydrocarbons and their oxidative derivatives in wintertime Beijing; China[J],2019,19(13).
APA	Elzein A.,Dunmore R.E.,Ward M.W.,Hamilton J.F.,&Lewis A.C..(2019).Variability of polycyclic aromatic hydrocarbons and their oxidative derivatives in wintertime Beijing; China.Atmospheric Chemistry and Physics,19(13).
MLA	Elzein A.,et al."Variability of polycyclic aromatic hydrocarbons and their oxidative derivatives in wintertime Beijing; China".Atmospheric Chemistry and Physics 19.13(2019).