Atmospheric deposition of antimony in a typical mercury-antimony mining area, Shaanxi Province, Southwest China

文献类型： 外文期刊

第一作者： Ao, Ming

作者： Ao, Ming;Qin, Song;Ao, Ming;Qiu, Guangle;Zhang, Chao;Xu, Xiaohang;Zhao, Lei;Feng, Xinbin;Meng, Bo

作者机构：

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.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序