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Abstract：
This study concerns the concentrations of gaseous and particle-bound mercury present in ambient air of two Polish sites, differing in terms of emission structure, and the estimation of inhalation risks related to those Hg species. The measurements of total gaseous mercury (TGM) and PM2.5-bound mercury (PBM) were performed at an urban station in Zabrze and a rural station in Złoty Potok, in 2014-2015. Both sites are located in Silesia, considered one of the European air pollution hot-spots. TGM was measured on-line (Tekran 2537). PM2.5 samples were taken with the use of low volume samplers. Hg contents in PM were determined by the CVAAS method following thermal decomposition. The median concentrations of TGM and PBM in Zabrze were 2.48 ng m-3 and 37.87 pg m-3, respectively; meanwhile in Zloty Potok, these were 1.69 ng m-3 and 27.82 pg m-3, respectively. Clearly, seasonal variability of TGM and PBM concentrations were observed, reflecting the importance of Hg and PM emissions from coal combustion for power and heating purposes. Health risk assessment was performed using a deterministic approach by the most conservative exposure scenario. The obtained HQ ratios and the cumulative HI indexes were below the limit value (<1). This means an unlikely health hazard due mercury inhalation.
摘要：
这项研究涉及两个波兰地点的环境空气中存在的气态和颗粒结合汞的浓度，在排放结构方面不同，以及与这些汞物种相关的吸入风险估计。总气态汞（TGM）和PM2.5结合汞（PBM）的测量是在Zabrze的城市站和ZswotyPotok的农村站进行的，2014-2015年。这两个地点都位于西里西亚，被认为是欧洲空气污染热点之一。TGM在线测量(Tekran2537)。PM2.5样品是使用低容量采样器采集的。热分解后，通过CVAAS法测定PM中的Hg含量。Zabrze中TGM和PBM的中值浓度分别为2.48ngm-3和37.87pgm-3；同时在兹罗提波托克，分别为1.69ngm-3和27.82pgm-3。显然,观察到TGM和PBM浓度的季节性变化，反映了煤炭燃烧对电力和供暖用途的汞和PM排放的重要性。在最保守的暴露情况下，使用确定性方法进行健康风险评估。获得的HQ比率和累积HI指数低于极限值(<1)。这意味着吸入汞不太可能对健康造成危害。
