4.7 Article

Speciation and transport of newly deposited mercury in a boreal forest wetland: A stable mercury isotope approach

期刊

WATER RESOURCES RESEARCH
卷 41, 期 6, 页码 -

出版社

AMER GEOPHYSICAL UNION
DOI: 10.1029/2004WR003219

关键词

-

向作者/读者索取更多资源

[ 1] As part of the Mercury Experiment to Assess Atmospheric Loadings in Canada and the United States ( METAALICUS) the fate and transport of contemporary mercury ( Hg) deposition in a boreal wetland was investigated using an experimentally applied stable mercury isotope. We applied high purity ( 99.2% +/- 0.1) (202) Hg( II) to a wetland plot to determine if ( 1) the Hg-202 was detectable above the pool of native Hg, ( 2) the Hg-202 migrated vertically and/or horizontally in peat and pore waters, and ( 3) the (202) Hg was converted to methylmercury ( MeHg) in situ. The Hg-202 was easily detected by ICP/MS in both solid peat and pore waters. Over 3 months, the Hg-202 migrated vertically downward in excess of 15 cm below the water table and traveled several meters horizontally beyond the experimental plot to the lake margin along the dominant vector of groundwater flow. Importantly, at one location, 6% of aqueous Hg-202 was detected as Me Hg-202 after only 1 day. These results indicate that new inorganic Hg in atmospheric deposition can be readily methylated and transported lakeward by shallow groundwater flow, confirming the important role of wetlands as contributors of Hg to aquatic ecosystems.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据