气候变化领域集成服务门户(CCPortal): Spatial distribution and source apportionment of peroxyacetyl nitrate (PAN) in a coastal region in southern China

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DOI	10.1016/j.atmosenv.2021.118553
	Spatial distribution and source apportionment of peroxyacetyl nitrate (PAN) in a coastal region in southern China
	Xia S.-Y.; Zhu B.; Wang S.-X.; Huang X.-F.; He L.-Y.
发表日期	2021
ISSN	1352-2310
卷号	260
英文摘要	Peroxyacetyl nitrate (PAN) is a typical secondary product of photochemical pollution and has attracted considerable attention because of its important role in atmospheric photochemical reactions and biotoxicity. Although existing studies have determined the dominant species of volatile organic compounds (VOCs) that can generate PAN, there are few studies including quantitative source analysis of PAN and precursor VOCs. In this study, PAN and precursor VOCs were measured at three sites in Shenzhen, a megacity on the southeast coast of China. The mean daytime (8:00–18:00) concentrations of PAN at the three sites during the sampling period were 0.70 ppbv (YMK, rural), 1.31 ppbv (DXC, residential) and 1.52 ppbv (FC, industrial), which had a different spatial distribution pattern compared to those of O3 and better reflect the degree of local anthropogenic emissions. Based on the steady-state model, the calculated PA radical formation rates cumulative contribution by six major carbonyl compounds at YMK and DXC were 4.4 × 106 moleculescm−3s−1 and 6.8 × 106 moleculescm−3s−1, respectively, and acetaldehyde contributed the highest percentage (44.4–54.3%) followed by acetone (15.1–25.6%), diacetyl (10.0–10.9%) and methylglyoxal (12.2–13.4%). Using an improved photochemical age-based parameterization method to analyze the daytime sources of PA radicals, the results show that biogenic sources were the most important source of PA radicals, accounting for 27.1% and 29.8% at YMK and DXC, respectively, and the contribution of anthropogenic secondary sources at DXC (25.8%) was significantly higher than at YMK (17.0%). The contribution of biomass burning at YMK reached 24.2%, emphasizing a critical role of biomass burning in atmospheric photochemical pollution in rural areas. © 2021 Elsevier Ltd
关键词	Peroxyacetyl nitrate (PAN)Photochemical pollution Precursors Spatial distribution
语种	英语
scopus关键词	Acetone; Air pollution; Formaldehyde; Industrial emissions; Molecules; Nitrates; Peroxides; Photochemical reactions; Rural areas; Volatile organic compounds; Biomass-burning; Coastal regions; Peroxyacetyl nitrate; Peroxyacetyl nitrates; Photochemical pollution; Photochemicals; Precursor; Source apportionment; Southern China; Volatile organics; Spatial distribution; 2,3 butanedione; acetaldehyde; acetone; carbonyl derivative; methylglyoxal; peroxyacetylnitrate; radical; volatile organic compound; acetaldehyde; anthropogenic effect; atmospheric pollution; coastal zone; peroxyacetyl nitrate; spatial distribution; volatile organic compound; air pollution; Article; biomass; China; combustion; industrial area; photochemistry; proton transfer reaction mass spectrometry; quantitative analysis; residential area; rural area; seashore; steady state; time series analysis; urban area; China; Guangdong; Shenzhen
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/248341
作者单位	Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Lishui Road, Nanshan District, Shenzhen, 518055, China; Chinese Society for Environmental Sciences, Beijing, 100082, China
推荐引用方式 GB/T 7714	Xia S.-Y.,Zhu B.,Wang S.-X.,et al. Spatial distribution and source apportionment of peroxyacetyl nitrate (PAN) in a coastal region in southern China[J],2021,260.
APA	Xia S.-Y.,Zhu B.,Wang S.-X.,Huang X.-F.,&He L.-Y..(2021).Spatial distribution and source apportionment of peroxyacetyl nitrate (PAN) in a coastal region in southern China.ATMOSPHERIC ENVIRONMENT,260.
MLA	Xia S.-Y.,et al."Spatial distribution and source apportionment of peroxyacetyl nitrate (PAN) in a coastal region in southern China".ATMOSPHERIC ENVIRONMENT 260(2021).