Journal ArticleDOI
Sampling and determination of gaseous and particulate mercury in the atmosphere using gold-coated denuders
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In this article, gold-coated denuders were used to separate gas phase and particulate phase Hg in air samples and the concentration of particulate Hg was found to be within the range of 0.11 to 0.57 ng m−3, which corresponds to 2.8 to 16.9% of the total airborne Hg.Abstract:
Gold-coated denuders have been used to separate gas phase and particulate phase Hg in air samples. The denuders were 65 cm long with a 0.4 cm i.d. and were capable of removing >99.9% of the vapor phase elemental Hg in an air stream at flow rates of about 1 L min−1. Data were obtained at different sampling locations around the city of Goteborg. The concentration of particulate Hg was found to be within the range of 0.11 to 0.57 ng m−3, which corresponds to 2.8 to 16.9% of the total airborne Hg. Positive correlations between the concentration of particulate Hg and that of soot and suspended particles as well as a negative correlation between the concentration of particulate Hg and relative humidity were observed.read more
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Mercury from combustion sources: A review of the chemical species emitted and their transport in the atmosphere
TL;DR: In this article, it was shown that emissions of coal combustion sources are approximately 20-50% elemental and 50-80% divalent mercury (HgCl2) and that the partitioning of mercury in flue gas between the elemental and divalent forms may depend on the concentration of particulate carbon, HCl and other pollutants in stack emissions.
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Regional trends in mercury distribution across the Great Lakes states, north central USA
Edward A. Nater,David F. Grigal +1 more
TL;DR: In this article, the authors report a significant gradient in concentrations and total amounts of mercury in organic litter and surface mineral soil along a transect of forested sites across the north central United States from northwestern Minnesota to eastern Michigan.
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Measuring and modeling mercury in the atmosphere: a critical review
TL;DR: In this paper, the authors present a review of current methods for measuring the forms of Hg in the atmosphere and models used to interpret these data, which has important implications for refining existing measurement methods and developing new ones.
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Modelling the atmospheric mercury cycle-chemistry in fog droplets
Karin Pleuel,John Munthe +1 more
TL;DR: In this article, a model was developed to describe the mass transport and chemistry of different forms of mercury in the atmosphere (the CAM model), and 48-hour simulations of an air parcel containing a fog were used to examine the influence of a number of chemical parameters on dissolved divalent mercury, Hg(II), in fog droplets.
References
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Journal ArticleDOI
Atmospheric mercury—a review*
Oliver Lindqvist,Henning Rodhe +1 more
TL;DR: In this paper, the authors assess present knowledge about atmospheric mercury: its occurrence in air and precipitation, chemical transformations taking place in the atmosphere, and mercury fluxes to and from the Earth's surface.
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Subnanogram determination of mercury by two-stage gold amalgamation and gas phase detection applied to atmospheric analysis
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Distribution, speciation, and budget of atmospheric mercury
TL;DR: In this paper, total gaseous mercury (TGM) concentrations over the Atlantic Ocean and over Central Europe were measured repeatedly in the years 1978-1981, and the tropospheric mercury burden was calculated to be 6×109g.
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Method for determination of atmospheric ammonia
TL;DR: In this article, the authors used the well-known fact that when ambient air passes through a tube, gas molecules diffuse much more quickly than particles to the tube wall to determine ammonia in air.
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Atmospheric oxidation of elemental mercury by ozone in the aqueous phase
Åke Iverfeldt,Oliver Lindqvist +1 more
TL;DR: In this paper, the aqueous phase oxidation of elemental mercury by ozone has been investigated in the laboratory using a quartz glass reactor with gas phase concentrations of 400-1800ng m−3 and 70-200 ppb for Hg(0) and O3, respectively.