| High contributions of fossil sources to more volatile organic aerosol | |
| Ni, Haiyan1,2,3,4; Huang, Ru-Jin2,3; Cao, Junji2,3; Dai, Wenting2,3; Zhou, Jiamao2,3; Deng, Haoyue1; Aerts-Bijma, Anita1; Meijer, Harro A. J.1; Dusek, Ulrike1 | |
| 通讯作者 | Huang, Ru-Jin(rujin.huang@ieecas.cn) |
| 2019-08-15 | |
| 发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
 |
| ISSN | 1680-7316 |
| 卷号 | 19期号:15页码:10405-10422 |
| 摘要 | Sources of particulate organic carbon (OC) with different volatility have rarely been investigated, despite the significant importance for better understanding of the atmospheric processes of organic aerosols. In this study we develop a radiocarbon-based (C-14) approach for source apportionment of more volatile OC (mvOC) and apply to ambient aerosol samples collected in winter in six Chinese megacities. mvOC is isolated by desorbing organic carbon from the filter samples in helium (He) at 200 degrees C in a custom-made aerosol combustion system for C-14 analysis. Evaluation of this new isolation method shows that the isolated mvOC amount agrees very well with the OC1 fraction (also desorbed at 200 degrees C in He) measured by a thermal-optical analyzer using the EUSAAR_2 protocol. The mvOC, OC and elemental carbon (EC) of 13 combined PM2.5 samples in six Chinese cities are analyzed for C-14 to investigate their sources and formation mechanisms. The relative contribution of fossil sources to mvOC is 59 +/- 11 %, consistently larger than the contribution to OC (48 +/- 16 %) and smaller than that to EC (73 +/- 9 %), despite large differences in fossil contributions in different cities. The average difference in the fossil fractions between mvOC and OC is 13% (range of 7 %-25 %), similar to that between mvOC and EC (13 %, with a range 4 %-25 %). Secondary OC (SOC) concentrations and sources are modeled based on the C-14-apportioned OC and EC and compared with concentrations and sources of mvOC. SOC concentrations (15.4 +/- 9.0 mu gm(-3)) are consistently higher than those of mvOC (3.3 +/- 2.2 mu gm(-3)), indicating that only a fraction of SOC is accounted for by the more volatile carbon fraction desorbed at 200 degrees C. The fossil fraction in SOC is 43% (10 %-70 %), lower than that in mvOC (59 %, with a range of 45 %-78 %). Correlation between mvOC and SOC from nonfossil sources (mvOC(nf) vs. SOCnf) and from fossil sources (mvOCfossil vs. SOCfossil) is examined to further explore sources and formation processes of mvOC and SOC. |
| DOI | 10.5194/acp-19-10405-2019 |
| 关键词[WOS] | SOURCE APPORTIONMENT ; SAMPLING ARTIFACTS ; CARBONACEOUS AEROSOLS ; PARTICULATE MATTER ; MASS-SPECTROMETER ; ELEMENTAL CARBON ; PHOTOCHEMICAL OXIDATION ; RADIOCARBON MEASUREMENT ; ATMOSPHERIC AEROSOLS ; CHEMICAL-COMPOSITION |
| 收录类别 | SCI ; SCI |
| 语种 | 英语 |
| 资助项目 | National Key Research and Development Program of China[2017YFC0212701] ; National Natural Science Foundation of China[91644219] ; National Natural Science Foundation of China[41877408] ; KNAW[530-5CDP30] |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| 项目资助者 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; KNAW |
| WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:000481727300004 |
| 出版者 | COPERNICUS GESELLSCHAFT MBH |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ieecas.cn/handle/361006/13605 |
| 专题 | 粉尘与环境研究室 第四纪科学与全球变化卓越创新中心 |
| 通讯作者 | Huang, Ru-Jin |
| 作者单位 | 1.Univ Groningen, Ctr Isotope Res, Energy & Sustainabil Res Inst Groningen, NL-9747 AG Groningen, Netherlands 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, Peoples R China 3.Chinese Acad Sci, CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ni, Haiyan,Huang, Ru-Jin,Cao, Junji,et al. High contributions of fossil sources to more volatile organic aerosol[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(15):10405-10422. |
| APA | Ni, Haiyan.,Huang, Ru-Jin.,Cao, Junji.,Dai, Wenting.,Zhou, Jiamao.,...&Dusek, Ulrike.(2019).High contributions of fossil sources to more volatile organic aerosol.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(15),10405-10422. |
| MLA | Ni, Haiyan,et al."High contributions of fossil sources to more volatile organic aerosol".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.15(2019):10405-10422. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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