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Characteristics of Atmospheric Speciated Gaseous Mercury in Chuncheon, Korea  

Gan, Sun-Yeong (Department of Environmental Science, Kangwon National University)
Yi, Seung-Muk (Department of Environment and Public Health, School of Public Health, Seoul National University)
Han, Young-Ji (Department of Environmental Science, Kangwon National University)
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Abstract
Atmospheric speciated mercury concentrations including total gaseous mercury (TGM) and reactive gaseous mercury (RGM) were measured in Chuncheon from March 2006 to November 2008. Average concentrations were 2.10 ${\pm}$ 1.50 ng/$m^3$ and 3.00 ${\pm}$ 3.14 pg/$m^3$ for TGM and RGM, respectively. RGM concentrations were higher during daytime than nighttime probably because of high photochemical activities. We found that RGM concentration considerably increased as ozone increased when fog occurred, indicating that ozone was the important oxidant for $Hg^0$ in aqueous phase. TGM concentration showed positive correlations with CO and $PM_{10}$ which can transport in long-range, but there was no correlation with $NO_2$. Considering that major source of mercury is combustion process, this result showed that local sources did not significantly impact on TGM concentration in Chuncheon. Five-day backward trajectories were calculated for the samples representing high and low concentrations of TGM, and determined that industrialized area of China including Shenyang and Beijing influenced TGM concentrations in Chuncheon.
Keywords
TGM; RGM; Backward Trajectory; Fog; $PM_{10}$;
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