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Huguangyan Maar Lake (SE China): A solid record of atmospheric mercury pollution history in a non-remote region
Yan Zeng;  Jingan Chen;  Yongqiong Yang;  Jianxu Wang;  Zhengjie Zhu;  Jian Li
2017
发表期刊Journal of Asian Earth Sciences
卷号147页码:1-8
摘要

Mercury is a highly toxic metal that can cause harm to environment and human health. As atmospheric deposition is the main source of total Hg input to aquatic system in remote and pristine regions, almost all the studies on atmospheric Hg pollution history concentrated in these areas, while the studies in non-remote areas are much limited, especially for the long history records. In this study, Huguangyan Maar Lake, an undisturbed lake system at low altitude in China, was selected to reconstruct the atmospheric mercury pollution history. Variation patterns of TOC, Hg and non-residual Sr in the sediment core indicated that, compared to the direct atmospheric Hg deposition, the effect of either Hg scavenging from water column by algae or the catchment inputs of previously deposited Hg on the Hg accumulation in the lake sediment was limited. The sediment Hg content in Huguangyan Lake was mainly controlled by the atmospheric Hg deposition, and thus accurately reflected the atmospheric Hg pollution history. The Hg-a (Hg content from atmospheric deposition) in Huguangyan Lake presented a comparable variation pattern to that in remote sites. It had the same variation trend as the global atmospheric Hg before 1950 CE, which could be attributed to the Industrial Revolution. After that, it was mainly controlled by Hg emissions from Asian countries. The variation of Hg-a also indicated that atmospheric Hg deposition accelerated significantly since 2000 CE. This study, along with other investigations in remote sites in China, showed that the sediment Hg in Huguangyan Lake responded to the atmospheric Hg pollution more sensitively than in the alpine regions. It should be noted that, the more intensive acceleration of Hg deposition in Huguangyan Lake may imply that the South of China suffered from much more serious atmospheric Hg pollution than previous studies revealed.

关键词Atmospheric Mercury Deposition Huguangyan Lake Sediment Pollution History
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/42920512-1/8029
专题环境地球化学国家重点实验室
作者单位1.Chinese Acad Sci, State Key Lab Environm Geochem, Inst Geochem, Guiyang 550081, Guizhou, Peoples R China
2.School of Geographic and Environmental Sciences, Guizhou Normal University, Guiyang 550001, China
推荐引用方式
GB/T 7714
Yan Zeng;Jingan Chen;Yongqiong Yang;Jianxu Wang;Zhengjie Zhu;Jian Li;. Huguangyan Maar Lake (SE China): A solid record of atmospheric mercury pollution history in a non-remote region[J]. Journal of Asian Earth Sciences,2017,147:1-8.
APA Yan Zeng;Jingan Chen;Yongqiong Yang;Jianxu Wang;Zhengjie Zhu;Jian Li;.(2017).Huguangyan Maar Lake (SE China): A solid record of atmospheric mercury pollution history in a non-remote region.Journal of Asian Earth Sciences,147,1-8.
MLA Yan Zeng;Jingan Chen;Yongqiong Yang;Jianxu Wang;Zhengjie Zhu;Jian Li;."Huguangyan Maar Lake (SE China): A solid record of atmospheric mercury pollution history in a non-remote region".Journal of Asian Earth Sciences 147(2017):1-8.
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