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Stable mercury isotopes stored in Masson Pinus tree rings as atmospheric mercury archives
Xun Wang;  Wei Yuan;  Che-Jen Lin;  Fei Wu;  Xinbin Feng
2021
发表期刊Journal of Hazardous Materials
卷号415页码:125678
摘要

The accuracy of mercury (Hg) dendrochemistry has been questioned because significant knowledge gaps exist in understanding the Hg translocation and mobility in tree-ring. In this study, we evaluated Hg concentrations and isotopic profiles in the tree-ring at a Hg artisanal mining site and a control site with the documented local Hg production inventory. Results show that the Hg concentration accumulated in tree-ring fails to reconstruct the temporal trend of Hg production due to confounded tree physiological and environmental factors, specifically, the radial translocation and tree age effects occurring during the fast-growing period. The temporal profiles of δ202Hg exhibit pronounced tree-specific variabilities due to the complexity of Hg isotopic mass dependent fractionation during atmospheric Hg uptake and translocation in vegetation. The Hg odd-MIF (mass independent fractionation) profiles in tree-ring can reconstruct a decadal-scale temporal trend of the atmospheric Hg0 pollution level, and also be used as a tracer to distinguish the emission source shifts of atmospheric Hg0. However, the radial translocation would result in uncertainties at the higher resolution because of the mixing of odd-MIF signatures with active rings. Caution should be taken and additional supporting evidence collected from independent methods should be used for verifying the tree-ring records.

关键词Mercury Isotopes tree Rings radial translocation Mercury Pollution
DOI10.1016/j.jhazmat.2021.125678
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语种英语
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被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/11213
专题环境地球化学国家重点实验室
通讯作者Xun Wang;  Wei Yuan;  Che-Jen Lin;  Fei Wu;  Xinbin Feng
作者单位1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2.College of Resources and Environment, Southwest University, Chongqing 400715, China
3.Center for Advances in Water and Air Quality, Lamar University, Beaumont 77710, USA
4.Department of Civil and Environmental Engineering, Lamar University, Beaumont 77710, USA
5.Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China
6.Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xian 710061, China
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Xun Wang;Wei Yuan;Che-Jen Lin;Fei Wu;Xinbin Feng. Stable mercury isotopes stored in Masson Pinus tree rings as atmospheric mercury archives[J]. Journal of Hazardous Materials,2021,415:125678.
APA Xun Wang;Wei Yuan;Che-Jen Lin;Fei Wu;Xinbin Feng.(2021).Stable mercury isotopes stored in Masson Pinus tree rings as atmospheric mercury archives.Journal of Hazardous Materials,415,125678.
MLA Xun Wang;Wei Yuan;Che-Jen Lin;Fei Wu;Xinbin Feng."Stable mercury isotopes stored in Masson Pinus tree rings as atmospheric mercury archives".Journal of Hazardous Materials 415(2021):125678.
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