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Characteristics and distributions of atmospheric mercury emitted from anthropogenic sources in Guiyang, southwestern Chin

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Acta Geochimica 2016年第3期35卷 240-250页

作者： Xiaohang Xu Na Liu Matthew S.Landis Xinbin Feng Guangle Qiu State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081People's Republic of China University of Chinese Academy of Sciences Beijing 100049People's Republic of China US EPA Office of Research and DevelopmentResearchTriangle ParkDurhamNC 27709USA

Continuous measurements of speciated atmo- spheric mercury （Hg）, including gaseous elemental mer- cury （gem）, particulate mercury （phg）, and reactive gaseous mercury （RGM） were conducted in Guizhou Pro- vince, southwestern China. Guiyang Power Plant （GPP）, Guiyang Wujiang Cement Plant, Guizhou Aluminum Plant （GAP）, and Guiyang Forest Park （GFP） in Guiyang were selected as study sites. Automatic Atmospheric Mercury Speciation Analyzers （Tekran 2537A） were used for gem analysis. phg and RGM were simultaneously collected by a manual sampling system, including elutriator, coupler/ impactor, KCl-coated annular denuder, and a filter holder. Results show that different emission sources dominate different species of Hg. The highest average gem value was 22.2 ±28.3 ng·m-3 and the lowest 6.1 ± 3.9 ng·m-3, from samples collected at GPP and GAP, respectively. The maximum average phg was 1984.9 pg·m-3 and the mini- mum average 55.9 pg·m-3, also from GPP and GAP, respectively. Similarly, the highest average RGM of 68.8 pg·m-3 was measured at GPP, and the lowest level of 20.5 pg·m-3 was found at GAP. We conclude that coal combustion sources are still playing a key role in gem; traffic contributes significantly to phg; and domestic pol- lution dominates RGM.

关键词： Atmospheric mercury Speciation Anthropogenic sources gem - phg RGM

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