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High contributions of fossil sources to more volatile organic aerosol

文献类型：期刊论文

作者Ni, Haiyan1,2,3,4; Huang, Ru-Jin1,4; Cao, Junji1,4; Dai, Wenting1,4; Zhou, Jiamao1,4; Deng, Haoyue3; Aerts-Bijma, Anita3; Meijer, Harro A. J.3; Dusek, Ulrike3
刊名ATMOSPHERIC CHEMISTRY AND PHYSICS
出版日期2019-08-15
卷号19期号:15页码:10405-10422
ISSN号1680-7316
DOI10.5194/acp-19-10405-2019
通讯作者Huang, Ru-Jin(rujin.huang@ieecas.cn)
英文摘要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.
WOS关键词SOURCE APPORTIONMENT ; SAMPLING ARTIFACTS ; CARBONACEOUS AEROSOLS ; PARTICULATE MATTER ; MASS-SPECTROMETER ; ELEMENTAL CARBON ; PHOTOCHEMICAL OXIDATION ; RADIOCARBON MEASUREMENT ; ATMOSPHERIC AEROSOLS ; CHEMICAL-COMPOSITION
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
语种英语
WOS记录号WOS:000481727300004
出版者COPERNICUS GESELLSCHAFT MBH
资助机构National Key Research and Development Program of China ; National Natural Science Foundation of China ; KNAW
源URL[http://ir.ieecas.cn/handle/361006/13604]  
专题地球环境研究所_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.Chinese Acad Sci, CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Groningen, Ctr Isotope Res, Energy & Sustainabil Res Inst Groningen, NL-9747 AG Groningen, Netherlands
4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, 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.

入库方式： OAI收割

来源：地球环境研究所

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