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DOI | 10.1002/2016JD026246 |
Sources and formation processes of water-soluble dicarboxylic acids, -oxocarboxylic acids, -dicarbonyls, and major ions in summer aerosols from eastern central India | |
Deshmukh, Dhananjay K.1,2; Kawamura, Kimitaka1,2; Deb, Manas K.3; Boreddy, Suresh K. R.1 | |
2017-03-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; India |
英文摘要 | The sources and formation processes of dicarboxylic acids are still under investigation. Size-segregated aerosol (nine-size) samples collected in the urban site (Raipur: 21.2 degrees N and 82.3 degrees E) in eastern central India during summer of 2013 were measured for water-soluble diacids (C-2-C-12), omega-oxoacids (omega C-2-omega C-9), alpha-dicarbonyls (C-2-C-3), and inorganic ions to better understand their sources and formation processes. Diacids showed the predominance of oxalic acid (C-2), whereas omega-oxoacids showed the predominance of glyoxylic acid (omega C-2), and glyoxal (Gly) was a major alpha-dicarbonyl in all the sizes. Diacids, omega-oxoacids, and alpha-dicarbonyls as well as SO42-, NO3-, and NH4+ were enriched in coarse mode, where Ca2+ peaked, suggesting that they are preferentially produced in coarse mode via adsorption as well as heterogeneous and aqueous-phase oxidation reaction of precursors on the surface of water-soluble mineral dust particles having more alkaline species. Strong correlations of diacids and related compounds with NO3- (r=0.66-0.91) and aerosol water content (AWC) (r=0.63-0.93) further suggest the importance of heterogeneous and aqueous-phase production in coarse mode. We found strong correlations of C-2/(C-2-C-12), C-2/omega C-2, and C-2/Gly ratios with AWC in coarse mode (r=0.83, 0.86, and 0.85, respectively), indicating that enhanced AWC is favorable for the production of C-2 diacid through aqueous-phase oxidation of its higher homologous diacids, omega C-2, and Gly. These results demonstrates unique reactivity of water-soluble mineral dust particles for the enhanced production of diacids and related compounds in aqueous-phase, having implications on the aerosol-cloud interaction, solubility, and hygroscopicity of a dominant fraction of water-soluble organic aerosol mass. |
英文关键词 | size-segregated aerosols unimodal distribution bimodal distribution secondary organic aerosols inorganic ions aqueous-phase chemistry |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399655200026 |
WOS关键词 | SECONDARY ORGANIC AEROSOL ; FINE-PARTICLE EMISSIONS ; AIR-POLLUTION SOURCES ; ALPHA-DICARBONYLS ; KETOCARBOXYLIC ACIDS ; ATMOSPHERIC PARTICLES ; SIZE DISTRIBUTIONS ; URBAN ATMOSPHERE ; INORGANIC-IONS ; OXALIC-ACID |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34130 |
专题 | 气候变化 |
作者单位 | 1.Hokkaido Univ, Inst Low Temp Sci, Sapporo, Hokkaido, Japan; 2.Chubu Univ, Chubu Inst Adv Studies, Kasugai, Aichi, Japan; 3.Pt Ravishankar Shukla Univ, Sch Studies Chem, Raipur, Madhya Pradesh, India |
推荐引用方式 GB/T 7714 | Deshmukh, Dhananjay K.,Kawamura, Kimitaka,Deb, Manas K.,et al. Sources and formation processes of water-soluble dicarboxylic acids, -oxocarboxylic acids, -dicarbonyls, and major ions in summer aerosols from eastern central India[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(6). |
APA | Deshmukh, Dhananjay K.,Kawamura, Kimitaka,Deb, Manas K.,&Boreddy, Suresh K. R..(2017).Sources and formation processes of water-soluble dicarboxylic acids, -oxocarboxylic acids, -dicarbonyls, and major ions in summer aerosols from eastern central India.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(6). |
MLA | Deshmukh, Dhananjay K.,et al."Sources and formation processes of water-soluble dicarboxylic acids, -oxocarboxylic acids, -dicarbonyls, and major ions in summer aerosols from eastern central India".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.6(2017). |
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