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Isotopic Composition of Gaseous Elemental Mercury in the Boundary Layer Of East China Sea
Xuewu Fu;  Xu Yang;  Qingyou Tan;  Lili;   Ming;  Tian Lin;  Che-Jen Lin;  Xiangdong Li;  Xinbin
2018
发表期刊Journal of Geophysical Research: Atmospheres
卷号123期号:14页码:7656-7669
摘要

Characterizing the speciation and isotope signatures of atmospheric mercury (Hg) downwind of mainland China is critical to understanding the outflow of Hg emission and the contributing sources. In this study, we measured the concentrations of gaseous elemental mercury (GEM), particulate bound mercury, gaseous oxidized mercury, and the GEM isotopic composition in the marine boundary layer of East China Sea from October 2013 to January 2014. Mean (+/- 1 sigma) GEM, particulate bound mercury, and gaseous oxidized mercury concentrations were 2.25 +/- 1.03 ng/m(3), 26 +/- 38 pg/m(3), and 8 +/- 10 pg/m(3) respectively. Most events of elevated GEM are associated with the outflow of Hg emissions in mainland China. The 24- and 48-hr integrated GEM samples showed large variations in both delta Hg-202 (-1.63 parts per thousand to 0.34 parts per thousand) and Delta Hg-199 (-0.26 parts per thousand to -0.02 parts per thousand). GEM delta Hg-202 and Delta Hg-199 were negatively and positively correlated to its atmospheric concentrations, respectively, suggesting a binary physical mixing of regional background GEM and Hg emissions in mainland China. Using a binary mixing model, highly negative delta Hg-202 (-1.79 +/- 0.24 parts per thousand, 1 sigma) and near-zero Delta Hg-199 (0.02 +/- 0.04 parts per thousand,1 sigma) signatures for China GEM emissions are predicted. Such isotopic signatures are significantly different from those found in North America and Europe and the background global/regional atmospheric GEM pool. It is likely that emissions from industrial and residential coal combustion (lacking conventional air pollutant control devices), cement and mercury production, biomass burning, and soil emissions contributed significantly to the estimated isotope signatures of GEM emissions in China.

收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/8881
专题环境地球化学国家重点实验室
作者单位1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 99 Lincheng West Road, Guiyang, 550081, China
2.Observatoire Midi-Pyrénées, Laboratoire Géosciences Environnement Toulouse, CNRS/IRD/Université de Toulouse, 14, avenue Édouard Belin, 31400 Toulouse, France
3.Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, HungHom, Kowloon, Hong Kong
4.Center for Advances in Water & Air Quality, Lamar University, Beaumont, Texas 77710, United States
推荐引用方式
GB/T 7714
Xuewu Fu;Xu Yang;Qingyou Tan;Lili; Ming;Tian Lin;Che-Jen Lin;Xiangdong Li;Xinbin. Isotopic Composition of Gaseous Elemental Mercury in the Boundary Layer Of East China Sea[J]. Journal of Geophysical Research: Atmospheres,2018,123(14):7656-7669.
APA Xuewu Fu;Xu Yang;Qingyou Tan;Lili; Ming;Tian Lin;Che-Jen Lin;Xiangdong Li;Xinbin.(2018).Isotopic Composition of Gaseous Elemental Mercury in the Boundary Layer Of East China Sea.Journal of Geophysical Research: Atmospheres,123(14),7656-7669.
MLA Xuewu Fu;Xu Yang;Qingyou Tan;Lili; Ming;Tian Lin;Che-Jen Lin;Xiangdong Li;Xinbin."Isotopic Composition of Gaseous Elemental Mercury in the Boundary Layer Of East China Sea".Journal of Geophysical Research: Atmospheres 123.14(2018):7656-7669.
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