Atmospheric deposition of antimony in a typical mercury-antimony mining area, Shaanxi Province, Southwest China
文献类型： 外文期刊
作者： Ao, Ming 1 ; Qiu, Guangle 2 ; Zhang, Chao 2 ; Xu, Xiaohang 2 ; Zhao, Lei 2 ; Feng, Xinbin 2 ; Qin, Song 1 ; Meng, Bo 2 ;
作者机构： 1.Guizhou Acad Agr Sci, Inst Soil & Fertilizer, Guiyang 550006, Guizhou, Peoples R China
2.Chinese Acad Sci, State Key Lab Environm Geochem, Inst Geochem, Guiyang 550002, Guizhou, Peoples R China
关键词： Hg-Sb mining; Atmospheric deposition; Antimony; Wet and dry deposition
期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）
ISSN： 0269-7491
年卷期： 2019 年 245 卷
页码：
收录情况： SCI
摘要： Mercury-antimony (Hg-Sb) mining activities are important anthropogenic sources of Hg and Sb to the local environment. The Xunyang Hg-Sb mine situated in Shaanxi Province is an active Hg mine in China. To understand the emission, transportation, and deposition of Sb through Hg-Sb mining activities, current study systematically monitored the Sb concentration in precipitation in the Xunyang Hg-Sb mining district. Five groups of experimental pots were carefully designed to further investigate the influence of Hg-Sb mining activities on the Sb contamination in the local surface soil. Based on the overtime increasing of the Sb concentrations in soil from experimental pots, for. the first trial, we estimated the atmospheric deposition flux/mass of Sb in the Xunyang Hg-Sb mining district. Our results showed that the concentrations of Sb in precipitation in the Xunyang Hg-Sb mining district ranged from 0.71 mu g L-1 to 19 mu g L-1 (mean = 4.2 +/- 4.5 mu g L-1), which was orders of magnitude higher than that at the control site. As expected, the concentration of Sb in precipitation was highly elevated near of the Hg-Sb smelter and gradually decreased with distance from the smelter. After 12 months exposure, Sb concentrations in soil of experimental pots were increased by 1.2-8.5 times. The average atmospheric wet and dry deposition flux of Sb in the Xunyang Hg-Sb mining district were 7.2 +/- 6.9 mu g m(-2) day(-1) and 2.1 +/- 4.7 mg m(-2) day(-1), respectively; the annual wet and dry deposition mass of Sb through Hg-Sb mining activities were estimated to be 1.6 t y(-1) and 158 t y(-1), respectively, indicating that dry deposition was the dominant pathway (98 +/- 1.2%) for the removal of Sb from the atmosphere. Our results confirmed that the ongoing Hg-Sb mining activities resulted to serious Sb contamination to terrestrial ecosystems, posing a potential threat to local residents in the Xunyang Hg-Sb mining district. (C) 2018 Elsevier Ltd. All rights reserved.
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