| Measurement of the Vertical Distribution of Gaseous Elemental Mercury Concentration in Soil Pore Air of Subtropical and Temperate Forests | |
| Zhou, Jun; Wang, Zhangwei; Zhang, Xiaoshan; Driscoll, Charles T. | |
| 2021-02-02 | |
| Source Publication | ENVIRONMENTAL SCIENCE & TECHNOLOGY
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| ISSN | 0013-936X |
| Volume | 55Issue:3Pages:2132-2142 |
| Abstract | Solid-gas-water phase partitioning of mercury (Hg) and the processes governing its diffusivity within soils are poorly studied. In this study, landscape and forest species dependences of gaseous elemental Hg (Hg(0)) in soil profiles (0-50 cm) were investigated over four seasons in eight subtropical (130 days) and temperate (96 days) forest plots. The vertical soil pore Hg(0) concentrations differed between subtropical (Masson pine, broad-leaved forest, and open field) and temperate (Chinese pine, larch, mixed broad-leaf forests, and open field) catchments, with annual averages ranging from 6.73 to 15.8 and 0.95 to 2.08 ng m(-3), respectively. The highest Hg(0) concentrations in soil gas consistently occurred in the upper mineral or organic horizons, indicating immobilization of Hg(0) in mineral soils. A strongly positive relationship between pore Hg(0) concentrations and ratios of Hg to organic matter (SOM) in soils suggests that the vertical distribution of Hg(0) is related to soil Hg(0) formation by Hg(II) reduction and sorption to SOM. Temperature was also an important driver of Hg(0) production in soil pores. Based on measurements of soil-air Hg(0) exchange, diffusion coefficients (D-s) of Hg(0) between soil and atmosphere were calculated for field sites, providing a foundation for future development and validation of terrestrial Hg models. |
| Department | 城市与区域生态国家重点实验室 |
| WOS Research Area | Engineering, Environmental ; Environmental Sciences |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/45510 |
| Collection | 城市与区域生态国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Univ Massachusetts, Dept Environm Earth & Atmospher Sci, Lowell, MA 01854 USA 5.Syracuse Univ, Dept Civil & Environm Engn, Syracuse, NY 13244 USA |
| Recommended Citation GB/T 7714 | Zhou, Jun,Wang, Zhangwei,Zhang, Xiaoshan,et al. Measurement of the Vertical Distribution of Gaseous Elemental Mercury Concentration in Soil Pore Air of Subtropical and Temperate Forests[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2021,55(3):2132-2142. |
| APA | Zhou, Jun,Wang, Zhangwei,Zhang, Xiaoshan,&Driscoll, Charles T..(2021).Measurement of the Vertical Distribution of Gaseous Elemental Mercury Concentration in Soil Pore Air of Subtropical and Temperate Forests.ENVIRONMENTAL SCIENCE & TECHNOLOGY,55(3),2132-2142. |
| MLA | Zhou, Jun,et al."Measurement of the Vertical Distribution of Gaseous Elemental Mercury Concentration in Soil Pore Air of Subtropical and Temperate Forests".ENVIRONMENTAL SCIENCE & TECHNOLOGY 55.3(2021):2132-2142. |
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