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Isotopic Composition of Gaseous Elemental Mercury in the Marine Boundary Layer of East China Sea
Xuewu Fu;  Xu Yang;  Qingyou Tan;  Lili Ming;  Tian Lin;  Che‐Jen Lin;  Xiangdong Li;  Xinbin Feng
2018
Source PublicationJournal of Geophysical Research: Atmospheres
Pages7656-7669
Abstract

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.

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/10114
Collection环境地球化学国家重点实验室
Affiliation1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China
2.Observatoire Midi-Pyrénées, Laboratoire Géosciences Environnement Toulouse, CNRS/IRD/Université de Toulouse, Toulouse, France
3.Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong
4.Center for Advances in Water and Air Quality, Lamar University, Beaumont, TX, USA
Recommended Citation
GB/T 7714
Xuewu Fu;Xu Yang;Qingyou Tan;Lili Ming;Tian Lin;Che‐Jen Lin;Xiangdong Li;Xinbin Feng. Isotopic Composition of Gaseous Elemental Mercury in the Marine Boundary Layer of East China Sea[J]. Journal of Geophysical Research: Atmospheres,2018:7656-7669.
APA Xuewu Fu;Xu Yang;Qingyou Tan;Lili Ming;Tian Lin;Che‐Jen Lin;Xiangdong Li;Xinbin Feng.(2018).Isotopic Composition of Gaseous Elemental Mercury in the Marine Boundary Layer of East China Sea.Journal of Geophysical Research: Atmospheres,7656-7669.
MLA Xuewu Fu;Xu Yang;Qingyou Tan;Lili Ming;Tian Lin;Che‐Jen Lin;Xiangdong Li;Xinbin Feng."Isotopic Composition of Gaseous Elemental Mercury in the Marine Boundary Layer of East China Sea".Journal of Geophysical Research: Atmospheres (2018):7656-7669.
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