The estimation of mercury exposure to workers through air deposition in the workshop of artisanal and small-scale gold mining
The estimation of mercury exposure to workers through air deposition in the workshop of artisanal and small-scale gold mining
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手工和小规模金矿开采车间空气沉积工人汞暴露估算
DOI：
10.11162/daikankyo.e19rp0302
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Takashi Tomiyasu
中科院分区：
文献类型：
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作者：
Yuriko Kono Hamada;Takashi Tomiyasu
研究的ASGM车间大气Hg （II）和Hg(0)浓度分别为0.0004 ~ 177 μg/m3（平均30.1 μg/m3）和5.53 ~ 4190 μg/m3（平均853 μg/m3）。汞合金燃烧时，汞（II）和汞(0)浓度均达到最高。汞合金燃烧过程中，车间汞（II）浓度与大气总汞的比值也有所升高。此外，作为对照，即使在不燃烧汞合金的情况下，车间内的汞（II）浓度也高于家中的汞（II）浓度，这表明汞合金燃烧产生的汞（II）在环境中是持久性的。放置在车间的PP塑料杯中收集的饮用水中汞的浓度在24 h内有所增加，汞（II）的比例从燃烧汞齐前的0.5%上升到燃烧汞齐操作后的31%。这一观察结果表明，氧化的汞Hg （II）很容易溶解于水相中；因此，即使是气态汞（II）的产生也会严重影响健康。
Atmospheric Hg (II) and Hg (0) concentrations in the studied ASGM workshops were between 0.0004 and 177 μg/m3 (average 30.1 μg/m3) and 5.53 and 4,190 μg/m3 (average 853 μg/m3), respectively. Hg (II) and Hg (0) both reached their highest concentrations when the amalgam was burned. The ratios of Hg (II) concentration to total atmospheric Hg in the workshop was also elevated during the amalgam burning process. Furthermore, Hg (II) concentrations in the workshop were higher than that in a house, which served as a control, even when amalgam was not burned, indicating that the amalgam combustion-generated Hg (II) is persistent in the environment. Hg concentration in drinking water, which was collected in plastic (PP) cup put in the workshop, increased over a period of 24 h, with the proportion of Hg (II) rising from 0.5% before amalgam burning to 31% after the amalgam burning operation. This observation suggests that oxidized Hg, Hg (II), is easily dissolved in the aqueous phase; therefore, even the generation of gaseous Hg (II) can impact the health seriously.