High abundances of dicarboxylic acids, oxocarboxylic acids, and alpha-dicarbonyls in fine aerosols (PM2.5) in Chengdu, China during wintertime haze pollution

Li, Xiao-dong; Yang, Zhou; Fu, Pingqing; Yu, Jing; Lang, Yun-chao; Liu, Di; Ono, Kaori; Kawamura, Kimitaka

High abundances of dicarboxylic acids, oxocarboxylic acids, and alpha-dicarbonyls in fine aerosols (PM2.5) in Chengdu, China during wintertime haze pollution

Li, Xiao-dong; Yang, Zhou; Fu, Pingqing et al.

Environmental science and pollution research, 2015, 22(17), 12902-12918

Permalink : https://hdl.handle.net/2115/61420

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アクセス権	open access
URI	https://hdl.handle.net/2115/61420
タイトル	High abundances of dicarboxylic acids, oxocarboxylic acids, and alpha-dicarbonyls in fine aerosols (PM2.5) in Chengdu, China during wintertime haze pollution
著者	Li, Xiao-dong ; Yang, Zhou ; Fu, Pingqing ; Yu, Jing ; Lang, Yun-chao ; Liu, Di ; Ono, Kaori ; Kawamura, Kimitaka
著者名 Li, Xiao-dong
著者名 Yang, Zhou
著者名 Fu, Pingqing
著者名 Yu, Jing
著者名 Lang, Yun-chao
著者名 Liu, Di
著者名 Ono, Kaori
e-Rad_Researcher 70201449 著者名 Kawamura, Kimitaka
言語	英語
キーワード	Dicarboxylic acids
	Oxocarboxylic acids
	alpha-dicarbonyls
	Urban aerosols
	Sichuan Basin
発行日	2015-04-28
出版者	Springer
収録物名	Environmental science and pollution research
巻(号)	22(17)
ページ	12902-12918
抄録	Daytime and nighttime fine aerosol (PM2.5) samples were collected during a haze episode in January 2013 within the urban area of Chengdu, southwest China. Aerosol samples were analyzed for low-molecular-weight homologous dicarboxylic acids, oxocarboxylic acids and alpha-dicarbonyls, as well as organic carbon and elemental carbon. Concentration ranges of diacids, oxoacids, and alpha-dicarbonyls were 1,400-5,250, 272-1,380, and 88-220 ng m(-3), respectively. Molecular distributions of diacids (mean 3,388 +/- 943 ng m(-3)) were characterized by a predominance of oxalic acid (C-2; 1,373 +/- 427 ng m(-3)), followed by succinic (C-4), terephthalic (tPh), and phthalic (Ph) acids. Such high levels of tPh and Ph were different from those in other Asian cities where malonic acid (C-3) is the second or third highest species, mostly owing to significant emissions from coal combustion and uncontrolled waste incineration. High contents of diacids, oxoacids, and alpha-dicarbonyls were detected on hazy days, suggesting an enhanced emission and/or formation of these organics during such a weather condition. Concentrations of unsaturated aliphatic diacids (e.g., maleic acid) and phthalic acids were higher in nighttime than in daytime. Good positive correlations of C-2 with C-3, C-4, ketomalonic (kC(3)), pyruvic (Pyr), and glyoxylic (E center dot C-2) acids in daytime suggest secondary production of C-2 via the photooxidation of longer chain diacids and E center dot C-2. This study demonstrated that both primary emissions and secondary production are important sources of dicarboxylic acids and related compounds in atmospheric aerosols in the Sichuan Basin.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	The final publication is available at Springer via http://dx.doi.org/10.1007/s11356-015-4548-x .
PISSN	0944-1344
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1007/s11356-015-4548-x