Quantitative Evaluation of Real-time Measurements of Atmospheric Mercury in a Mercury- contaminated Area
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On-site real-time measurements may be one of the most useful methods to estimate Hg pollution levels at mercury-contaminated sites. However, there are very few reports that estimate the reliability of real-time mercury measurements across a wide concentration range. We performed real-time measurement of atmospheric mercury in a small-scale gold mining (SSGM) area contaminated with mercury and compared results with data obtained by conventional sampling methods.<br> On-site real-time atmospheric mercury analysis was conducted at 12 locations in the Cikaniki River Basin, West Java, Indonesia, in July 2011 and February 2012 using an EMP-2 Mercury Analyzer (NIC, Tokyo, Japan). Temporal variations in atmospheric elemental mercury (Hg<sup>0</sup>) concentrations were recorded at each location, and atmospheric Hg<sup>0</sup> was simultaneously collected by conventional methods using a mercury collector tube (Hg<sub>tube</sub>) and KMnO<sub>4</sub> solution (Hg<sub>Mn</sub>).<br> The concentrations of atmospheric mercury collected by the conventional methods ranged from 0.17 to 36 μg m<sup>−3</sup> (n=19), while that obtained by the real-time measurement (Hg<sub>real-time</sub>) ranged from <0.1 to 38 μg m (n=19). Although the concentration of atmospheric mercury at each location varied widely over time, the median Hg<sub>real-time</sub> values for a given sampling time were linearly related to Hg<sub>tube</sub> and Hg<sub>Mn</sub> (r<sup>2</sup> =0.95, n=19, p<0.01) with a slope value of 0.99. The analysis showed that atmospheric Hg<sup>0</sup> concentrations at SSGM sites contaminated with mercury can be quantitatively estimated by real-time measurements.
- Journal of Environment and Safety
Journal of Environment and Safety 4(2), 2_153-2_157, 2013
Academic Consociation of Environmental Safety and Waste Management, Japan