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Characterization of particulate-bound polycyclic aromatic compounds (PACs) and their oxidations in heavy polluted atmosphere: A case study in urban Beijing, China during haze events
Li, LJ (Li, Li Juan)1,2,3; Ho, SSH (Ho, Steven Sai Hang)1,2,4; Feng, BH (Feng, Baihuan)5,6; Xu, HB (Xu, Hongbing)5,6; Wang, T (Wang, Tong)5,6; Wu, RS (Wu, Rongshan)5,6; Huang, W (Huang, Wei)5,6; Qu, LL (Qu, Linli)7; Wang, QY (Wang, Qiyuan)1,2; Cao, JJ (Cao, Junji)1,2
2019-04-10
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
Volume660Pages:1392-1402
Contribution Rank1
AbstractCharacterizations on polycyclic aromatic compounds (PACs) during frequent haze periods have been conducted in an urban site of Beijing, China. Particulate polycyclic aromatic hydrocarbons (PAHs) and oxygenated-PAHs (OPAHs) and other carbonaceous matters were quantified. The average PM2.5 during haze events (256.3 +/- 103.7 mu g/m(3)) were one magnitude over than that of clear periods (CRs, 24.7 +/- 27.7 mu g/m(3)). The average total quantified PAHs (Sigma PAHs) and OPAHs (Sigma OPAHs) during haze events were 423.9 +/- 178.4 ng/m(3) and 581.4 +/- 299.8 ng/m(3), respectively, which were approximately 10 times higher than those of 40.3 +/- 68.2 ng/m(3) and 54.4 +/- 82.4 ng/m(3) in clear days. Four-rings PAHs had the highest compositions. 1,8-Naphthalic anhydride (1,8-NA) is the most abundant OPAHs, accounted for 49.8% of Sigma OPAHs, followed by 9,10-anthraquinone (9,10-AQ) (13.8%) and benzo(a)anthracene-7,12-dione (BaAQ) (8.31%). In haze events, the contents of 5- to 7-rings PAHs decreased by 2.32% compared with those of clear days, while lower molecular weight fractions of 3- and 4-rings PAHs increased. The relationships between PAHs, OPAHs and relative humidity (RH) were found to be exponential. High oxygenation rate (R-0) ratios of OPAH/PAH represents higher rates in secondary formation or degradation and gas-particle conversion for each PAH or OPAH during the wintertime. Significant positive correlation between BeP and OPAHs (r = 0.97), combined with the results of photochemical aging and negatively correlationwith O-3, suggest that secondary atmospheric reactions of PAHs played an important role in the burden of OPAHs.
KeywordPM2.5 PAHs Oxygenated PAHs Secondary organic formation
Indexed BySCI ; SCIE
Language英语
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10932
Collection粉尘与环境研究室
Corresponding AuthorHo, SSH (Ho, Steven Sai Hang); Cao, JJ (Cao, Junji)
Affiliation1.Chinese Acad Sci, Key Lab Aerosol Chem & Phys, Inst Earth Environm, Xian, Shaanxi, Peoples R China;
2.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian, Shaanxi, Peoples R China;
3.Univ Chinese Acad Sci, Beijing, Peoples R China;
4.Desert Res Inst, Div Atmospher Sci, Reno, NV USA;
5.Peking Univ, Sch Publ Hlth, Dept Occupat & Environm Hlth, Beijing, Peoples R China;
6.Peking Univ, Key Lab Mol Cardiovasc Sci, Minist Educ, Beijing, Peoples R China;
7.Hong Kong Special Adm Reg, Hong Kong Premium Serv & Res Lab, Lai Chi Kok, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Li, LJ ,Ho, SSH ,Feng, BH ,et al. Characterization of particulate-bound polycyclic aromatic compounds (PACs) and their oxidations in heavy polluted atmosphere: A case study in urban Beijing, China during haze events[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,660:1392-1402.
APA Li, LJ .,Ho, SSH .,Feng, BH .,Xu, HB .,Wang, T .,...&Cao, JJ .(2019).Characterization of particulate-bound polycyclic aromatic compounds (PACs) and their oxidations in heavy polluted atmosphere: A case study in urban Beijing, China during haze events.SCIENCE OF THE TOTAL ENVIRONMENT,660,1392-1402.
MLA Li, LJ ,et al."Characterization of particulate-bound polycyclic aromatic compounds (PACs) and their oxidations in heavy polluted atmosphere: A case study in urban Beijing, China during haze events".SCIENCE OF THE TOTAL ENVIRONMENT 660(2019):1392-1402.
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