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Hokkaido University Collection of Scholarly and Academic Papers >
Institute of Low Temperature Science >
Peer-reviewed Journal Articles, etc >
High abundances of dicarboxylic acids, oxocarboxylic acids, and alpha-dicarbonyls in fine aerosols (PM2.5) in Chengdu, China during wintertime haze pollution
| Title: | High abundances of dicarboxylic acids, oxocarboxylic acids, and alpha-dicarbonyls in fine aerosols (PM2.5) in Chengdu, China during wintertime haze pollution |
| Authors: | Li, Xiao-dong Browse this author | | Yang, Zhou Browse this author | | Fu, Pingqing Browse this author | | Yu, Jing Browse this author | | Lang, Yun-chao Browse this author | | Liu, Di Browse this author | | Ono, Kaori Browse this author | | Kawamura, Kimitaka Browse this author →KAKEN DB |
| Keywords: | Dicarboxylic acids | | Oxocarboxylic acids | | alpha-dicarbonyls | | Urban aerosols | | Sichuan Basin |
| Issue Date: | 28-Apr-2015 |
| Publisher: | Springer |
| Journal Title: | Environmental science and pollution research |
| Volume: | 22 |
| Issue: | 17 |
| Start Page: | 12902 |
| End Page: | 12918 |
| Publisher DOI: | 10.1007/s11356-015-4548-x |
| Abstract: | 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. |
| Rights: | The final publication is available at Springer via http://dx.doi.org/10.1007/s11356-015-4548-x . |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/61420 |
| Appears in Collections: | 低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 河村 公隆
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