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Wet deposition flux and runoff output flux of mercury in a typical small agricultural watershed in Three Gorges Reservoir areas

文献类型： 外文期刊

作者： Zhao, Zheng 1 ; Wang, Dingyong 1 ; Wang, Ya 1 ; Mu, Zhijian 1 ; Zhu, Jinshan 3 ;

作者机构： 1.Southwest Univ, Coll Resources & Environm, Chongqing 400715, Peoples R China

2.Chongqing Key Lab Agr Resources & Environm, Chongqing 400716, Peoples R China

3.Chongqing Acad Agr Sci, Chongqing 401329, Peoples R China

关键词： Mercury;Input;Output;Agricultural watershed;Three Gorges Reservoir areas

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

ISSN：

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收录情况： SCI

摘要： In order to explore the contributions of wet deposition and runoff formed by rainfall events to the water body mercury burden in Three Gorges Reservoir (TGR), we conducted a 1-year successive study on the deposition fluxes and runoff output characteristics of total mercury (THg) and methylmercury (TMeHg) in a typical small agricultural watershed in TGR areas. The results showed that the annual volume-weighted concentration (VWC) of THg and TMeHg was 18 and 0.23 ng L-1, respectively. Particulate form was the main form of both THg and TMeHg, accounting for 61 % of THg and 59 % of TMeHg. The annual deposition fluxes of THg and TMeHg in rainfall were 13 +/- 2.4 mu g m(-2) year(-1) and 174 +/- 52 ng m(-2) year(-1), respectively. The VWCs of THg and TMeHg in runoff were 10 +/- 6.5 and 0.15 +/- 0.15 ng L-1. The annual output fluxes of THg and TMeHg to TGR from study area were 1.2 +/- 0.73 mu g m(-2) year(-1) and 17 +/- 16 ng m(-2) year(-1), respectively.

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