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Molecular characteristics and stable carbon isotope compositions of dicarboxylic acids and related compounds in the urban atmosphere of the North China Plain: Implications for aqueous phase formation of SOA during the haze periods
Meng, Jingjing1,2; Liu, Xiaodi1; Hou, Zhanfang1,2; Yi, Yanan1; Yan, Li3; Li, Zheng1; Cao, Junji2; Li, Jianjun2; Wang, Gehui2,4
Corresponding AuthorWang, Gehui(wanggh@ieecas.cn)
2020-02-25
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume705Pages:13
AbstractIn the past five years, Chinese government has promulgated stringent measures to mitigate air pollution. However, PM2.5 levels in the China North Plain (NCP), which is one of the regions with the heaviest air pollution in the world, are still far beyond the World Health Organization (WHO) standard. To improve our understanding on the sources and formation mechanisms of haze in the NCP, PM2.5 samples were collected during the winter of 2017 on a day/night basis at the urban site of Liaocheng, which is one of the most polluted cities in the NCP. The samples were determined for molecular distributions and stable carbon isotope compositions of dicarboxylic acids and their precursors (ketocarboxylic acids and alpha-dicarbonyls), levoglucosan, elemental carbon (EC), organic carbon (OC) and water-soluble organic carbon (WSOC). Our results showed that oxalic acid (C-2) is the dominant dicarboxylic acid, followed by succinic acid (C-4) and malonic acid (C-3), and glyoxylic acid (omega C-2) is the most abundant ketocarboxylic acids. Concentrations of C2, glyoxal (Gly) and methylglyoxal (mGly) presented robust correlations with levoglucosan, suggesting that biomass burning is a significant source of PM2.5 in the NCP. Moreover, C-2 and Gly and mGly linearly correlated with SO42-, relative humidity (RH), aerosol liquid water content (LWC) as well as particle in-situ pH (pH(is)), indicating that aqueous-phase oxidation is the major formation pathway of these SOA, and is driven by acid-catalyzed oxidation. Concentrations and relative abundances of secondary species including SNA (SO42, NO3 and NH4+), dicarboxylic acids, and aerosol LWC in PM2.3 are much higher in the haze periods than in the clean periods, suggesting that aqueous reaction is a vital role in the haze formation. In comparison with those in the clean periods, stable carbon isotopic compositions (delta C-13) of major dicarboxylic acids and related SOA and the mass ratios of C-2/cliacids, C-2/Gly and C-2/mGly are higher in the haze periods, indicating that haze particles were more aged and enriched in secondary species. (C) 2019 The Author(s). Published by Elsevier B.V.
KeywordBiomass burning Aqueous phase oxidation Aerosol liquid water content Aerosol acidity Secondary organic aerosol formation
DOI10.1016/j.scitotenv.2019.135256
WOS KeywordSECONDARY ORGANIC AEROSOL ; LONG-RANGE TRANSPORT ; SIZE DISTRIBUTION CHARACTERISTICS ; OMEGA-OXOCARBOXYLIC ACIDS ; DAY-NIGHT VARIABILITY ; ALPHA-DICARBONYLS ; OXALIC-ACID ; KETOCARBOXYLIC ACIDS ; INORGANIC-IONS ; ELEMENTAL CARBON
Indexed BySCI ; SCI
Language英语
Funding ProjectChina National Science Funds[41505112] ; China National Science Funds[41702373] ; Natural Science Foundation of Shandong Province[BS2015HZ002] ; China National Natural Science Funds for Distinguished Young Scholars[41325014] ; Open Funds of State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences[SKLLQG1509] ; Open Funds of State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences[SKLLQG1504]
WOS Research AreaEnvironmental Sciences & Ecology
Funding OrganizationChina National Science Funds ; Natural Science Foundation of Shandong Province ; China National Natural Science Funds for Distinguished Young Scholars ; Open Funds of State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences
WOS SubjectEnvironmental Sciences
WOS IDWOS:000508129700011
PublisherELSEVIER
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/13129
Collection粉尘与环境研究室
黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorWang, Gehui
Affiliation1.Liaocheng Univ, Sch Environm & Planning, Liaocheng 252000, Shandong, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
3.Chinese Acad Environm Planning, Beijing 100012, Peoples R China
4.East China Normal Univ, Sch Geog Sci, Key Lab Geog Informat Sci, Minist Educ, Shanghai 200062, Peoples R China
Recommended Citation
GB/T 7714
Meng, Jingjing,Liu, Xiaodi,Hou, Zhanfang,et al. Molecular characteristics and stable carbon isotope compositions of dicarboxylic acids and related compounds in the urban atmosphere of the North China Plain: Implications for aqueous phase formation of SOA during the haze periods[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,705:13.
APA Meng, Jingjing.,Liu, Xiaodi.,Hou, Zhanfang.,Yi, Yanan.,Yan, Li.,...&Wang, Gehui.(2020).Molecular characteristics and stable carbon isotope compositions of dicarboxylic acids and related compounds in the urban atmosphere of the North China Plain: Implications for aqueous phase formation of SOA during the haze periods.SCIENCE OF THE TOTAL ENVIRONMENT,705,13.
MLA Meng, Jingjing,et al."Molecular characteristics and stable carbon isotope compositions of dicarboxylic acids and related compounds in the urban atmosphere of the North China Plain: Implications for aqueous phase formation of SOA during the haze periods".SCIENCE OF THE TOTAL ENVIRONMENT 705(2020):13.
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