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

doi:10.1016/j.chemgeo.2018.11.018

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 粉尘与环境研究室

	Mercury stable isotope compositions of Chinese urban fine particulates in winter haze days: Implications for Hg sources and transformations
	Xu, H. M.1,2,6; Sun, R. Y.7; Cao, J. J.1; Huang, Ru-Jin 1; Guinot, B.2; Shen, Z. X.6; Jiskra, M.3; Li, C. X.3,4; Du, B. Y.5; He, C.6
刊名	CHEMICAL GEOLOGY
	2019-01-20
卷号	504 页码:267-275
关键词	PM2.5 Mercury isotope Chinese cities Hg source Photoreduction
ISSN号	0009-2541
DOI	10.1016/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.
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
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
内容类型	期刊论文
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.Univ Toulouse, Lab Aerol, CNRS, UPS, Toulouse, France 3.Univ Toulouse, Observ Midi Pyrenees, Lab Geosci Environm Toulouse, CNRS,IRD, Toulouse, France 4.Univ Toulouse, INPT, CNRS, EcoLab,UPS, Castanet Tolosan, France 5.Chinese Acad Sci, State Key Lab Environm Geochem, Inst Geochem, Guiyang, Guizhou, Peoples R China 6.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian, Shaanxi, Peoples R China 7.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin, 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.