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Mercury stable isotope compositions of Chinese urban fine particulates in winter haze days: Implications for Hg sources and transformations

文献类型：期刊论文

作者Xu, H. M.1,5,7; Sun, R. Y.6; Cao, J. J.1; Huang, Ru-Jin1; Guinot, B.5; Shen, Z. X.7; Jiskra, M.4; Li, C. X.3,4; Du, B. Y.2; He, C.7
刊名CHEMICAL GEOLOGY
出版日期2019-01-20
卷号504页码:267-275
ISSN号0009-2541
关键词PM2.5 Mercury isotope Chinese cities Hg source Photoreduction
DOI10.1016/j.chemgeo.2018.11.018
通讯作者Sun, R. Y.(ruoyu.sun@tju.edu.cn) ; Cao, J. J.(cao@loess.llqg.ac.cn)
英文摘要Atmospheric pollution by fine particulates and mercury (Hg) in emerging economies is a serious environmental concern. Here, we present Hg concentrations and isotope compositions of 24-hour integrated fine particulate matter (PM2.5) samples collected during January 2014 at four large Chinese cities (three inland cities: Beijing, Changchun and Chengdu; one coastal city: Hong Kong), with an aim of identifying the potential Hg sources and transformation processes. Mean concentrations of PM2.5 (171 +/- 62 mu g m(-3)) and PM2.5-bound Hg (1.3 +/- 1.1 ng m(-3)) in Chengdu were the highest. Overall, PM2.5 samples in Chinese inland cities were characterized by moderately negative delta Hg-202 (-1.08 +/- 0.64 parts per thousand, 1 sigma), slightly negative Delta Hg-199 (- 0.13 +/- 0.28 parts per thousand, 1 sigma) and insignificant Delta Hg-200 (0.03 +/- 0.05 parts per thousand, 1 sigma). On average, delta Hg-202 of PM2.5 was the highest in Chengdu (- 0.74 +/- 0.67 parts per thousand, 1 sigma), followed by Beijing (- 1.11 +/- 0.26 parts per thousand, 1 sigma) and Changchun (- 1.60 +/- 0.45 parts per thousand, 1 sigma). PM2.5 from Beijing showed the most negative Delta Hg-199 (- 0.31 +/- 0.40 parts per thousand, 1 sigma) that was significantly lower than Changchun (- 0.12 +/- 0.21 parts per thousand, 1 sigma) and Chengdu (- 0.02 +/- 0.15 parts per thousand, 1 sigma). Coal combustion and cement production were identified to be the dominant sources of PM2.5-bound Hg in these cities, with additional Hg sources from non-ferrous metal smelting in Chengdu. Besides, Hg emissions from biomass burning were evident in specific days for each city. We found that source materials and isotope fractionation during emission processes could not fully explain the observed Hg isotope compositions in PM2.5, especially the large negative Delta Hg-199 values ( < -0.3 parts per thousand) in Beijing. The near-unity slope of Delta Hg-199 vs. Delta Hg-201 in PM2.5 samples from each studied city indicates that Hg n in the fine aerosols was likely photo-reduced to different degrees in the atmosphere following emission from sources.
WOS关键词MASS-INDEPENDENT FRACTIONATION ; GREAT-LAKES PRECIPITATION ; GASEOUS ELEMENTAL MERCURY ; FIRED POWER-PLANTS ; ATMOSPHERIC MERCURY ; SOURCE IDENTIFICATION ; ANTHROPOGENIC SOURCES ; TRACE-ELEMENTS ; COAL DEPOSITS ; POLLUTION
资助项目National Natural Science Foundation of China[41503096] ; National Natural Science Foundation of China[41773104] ; National Key Research and Development Plan[2016YFC0201600] ; National Key Research and Development Plan[2017YFC0212700] ; Chinese Government Scholarship (CSC)[201506285035] ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, China[SKLLQG1722]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000454620400020
资助机构National Natural Science Foundation of China ; National Key Research and Development Plan ; Chinese Government Scholarship (CSC) ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, China
源URL[http://ir.ieecas.cn/handle/361006/14455]  
专题地球环境研究所_粉尘与环境研究室
通讯作者Sun, R. Y.; Cao, J. J.
作者单位1.Chinese Acad Sci, Key Lab Aerosol Chem & Phys, Inst Earth Environm, SKLLQG, Xian, Shaanxi, Peoples R China
2.Chinese Acad Sci, State Key Lab Environm Geochem, Inst Geochem, Guiyang, Guizhou, Peoples R China
3.Univ Toulouse, INPT, CNRS, EcoLab,UPS, Castanet Tolosan, France
4.Univ Toulouse, Observ Midi Pyrenees, Lab Geosci Environm Toulouse, CNRS,IRD, Toulouse, France
5.Univ Toulouse, Lab Aerol, CNRS, UPS, Toulouse, France
6.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin, Peoples R China
7.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 Xu, H. M.,Sun, R. Y.,Cao, J. J.,et al. Mercury stable isotope compositions of Chinese urban fine particulates in winter haze days: Implications for Hg sources and transformations[J]. CHEMICAL GEOLOGY,2019,504:267-275.
APA Xu, H. M..,Sun, R. Y..,Cao, J. J..,Huang, Ru-Jin.,Guinot, B..,...&Sonke, J. E..(2019).Mercury stable isotope compositions of Chinese urban fine particulates in winter haze days: Implications for Hg sources and transformations.CHEMICAL GEOLOGY,504,267-275.
MLA Xu, H. M.,et al."Mercury stable isotope compositions of Chinese urban fine particulates in winter haze days: Implications for Hg sources and transformations".CHEMICAL GEOLOGY 504(2019):267-275.

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来源：地球环境研究所

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