DOI: 10.1029/2018JD028671
Scopus记录号: 2-s2.0-85050911117
论文题名: Isotopic Composition of Gaseous Elemental Mercury in the Marine Boundary Layer of East China Sea
作者: Fu X. ; Yang X. ; Tan Q. ; Ming L. ; Lin T. ; Lin C.-J. ; Li X. ; Feng X.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 14 起始页码: 7656
结束页码: 7669
语种: 英语
英文关键词: atmospheric mercury species
; marine boundary layer
; mercury isotope
英文摘要: 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 (±1σ) GEM, particulate bound mercury, and gaseous oxidized mercury concentrations were 2.25 ± 1.03 ng/m3, 26 ± 38 pg/m3, and 8 ± 10 pg/m3, 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 δ202Hg (−1.63‰ to 0.34‰) and Δ199Hg (−0.26‰ to −0.02‰). GEM δ202Hg and Δ199Hg 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 δ202Hg (−1.79 ± 0.24‰, 1σ) and near-zero Δ199Hg (0.02 ± 0.04‰, 1σ) 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. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113496
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China; Observatoire Midi-Pyrénées, Laboratoire Géosciences Environnement Toulouse, CNRS/IRD/Université de Toulouse, Toulouse, France; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong; Center for Advances in Water and Air Quality, Lamar University, Beaumont, TX, United States
Recommended Citation:
Fu X.,Yang X.,Tan Q.,et al. Isotopic Composition of Gaseous Elemental Mercury in the Marine Boundary Layer of East China Sea[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(14)