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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 PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume55Issue:3Pages:2132-2142
AbstractSolid-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 AreaEngineering, Environmental ; Environmental Sciences
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/45510
Collection城市与区域生态国家重点实验室
Affiliation1.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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