Atmospheric concentrations and deposition of Hg to A deciduous forest atwalker branch watershed, Tennessee, USA

Lindberg, S. E.; Turner, Robert; Meyers, Tilden P.; Taylor, George; Schroeder, W. H.

doi:10.1007/bf00342301

Cited by 103 publications

(38 citation statements)

References 22 publications

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“…Slemr and Scheel, 1998;Ebinghaus et al, 2002;Kellerhals et al, 2003), although maxima in summer and minima in winter have also been observed at a few sites (e.g. Lindberg et al, 1991). The seasonal variation Fig.…”

Section: North-south Distributionmentioning

confidence: 85%

Gaseous mercury distribution in the upper troposphere and lower stratosphere observed onboard the CARIBIC passenger aircraft

Šlemr¹,

Ebinghaus²,

Brenninkmeijer³

et al. 2009

Atmos. Chem. Phys.

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Abstract. Total gaseous mercury (TGM) was measured onboard a passenger aircraft during monthly CARIBIC flights (Civil Aircraft for Regular Investigation of the Atmosphere Based on an Instrumented Container) made between May 2005 and March 2007 on the routes Frankfurt-São PauloSantiago de Chile and back and Frankfurt-GuangzhouManila and back. The data provide for the first time an insight into the seasonal distributions of TGM in the upper troposphere and lower stratosphere (UT/LS) of both hemispheres and demonstrate the importance of mercury emissions from biomass burning in the Southern Hemisphere. Numerous plumes were observed in the upper troposphere, the larger of which could be characterized in terms of Hg/CO emission ratios and their probable origins. During the flights to China TGM correlated with CO in the upper troposphere with a seasonally dependent slope reflecting the longer lifetime of elemental mercury when compared to that of CO. A pronounced depletion of TGM was always observed in the extratropical lowermost stratosphere. TGM concentrations there were found to decrease with the increasing concentrations of particles. Combined with the large concentrations of particle bond mercury in the stratosphere observed by others, this finding suggests either a direct conversion of TGM to particle bound mercury or an indirect conversion via Correspondence to: F. Slemr (slemr@mpch-mainz.mpg.de) a semivolatile bivalent mercury compound. Based on concurrent measurements of SF 6 during two flights, the rate of this conversion is estimated to 0.4 ng m −3 yr −1 . A zero TGM concentration was not observed during some 200 flight hours in the lowermost stratosphere suggesting an equilibrium between the gaseous and particulate mercury.

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Section: North-south Distributionmentioning

confidence: 85%

Gaseous mercury distribution in the upper troposphere and lower stratosphere observed onboard the CARIBIC passenger aircraft

Šlemr¹,

Ebinghaus²,

Brenninkmeijer³

et al. 2009

Atmos. Chem. Phys.

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“…This may be due to direct foliage adsorption of mercury vapor from air by plants. Direct foliage absorption of mercury vapor from the air was observed in trees and mosses (Lindberg et al 1991). Direct uptake of elemental Hg via stomata is controlled by stomatal and mesophyll resistances (Lindberg et al 1991).…”

Section: Bioavailability Of Hg In Hgs-contaminated Soilsmentioning

confidence: 96%

Extractability and Bioavailability of Mercury from a Mercury Sulfide Contaminated Soil in Oak Ridge, Tennessee, USA

Han

Shiyab

Chen

et al. 2008

Water Air Soil Pollut

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“…Elemental mercury vapor primarily affects the kidney (Houeto et al, 1994;Marek et al, 1994) but, particularly at high concentration, it is also neurotoxic (Ratcliffe and Swanson, 1996;Rennie et al, 1999;Wide, 1986). The levels of mercury vapor in the atmosphere are usually low -from 1 to 6 ng/m 3 (Brosset and Lord, 1991;Ahmet et al, 1987;Linberg et al, 1991), from 10 to 50 ng/m 3 in industrialized areas -and not harmful to humans. Higher levels are observed near mercury point emission sources.…”

Section: Introductionmentioning

confidence: 95%

Mercury Vapor Determination in Hospitals

Prokopowicz

Mniszek

2005

Environ Monit Assess

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The measurements of metallic mercury vapor were carried out in seven local hospitals, where mercury-containing products are widely used, as well as in one residence to check effectiveness of decontamination after mercury spillage. Hopcalite as a solid sorbent was used in active and passive sampling methods, and mercury was analyzed by CV-AAS technique. Good agreement was found between results of mercury measurements using active samplers (pumped hopcalite adsorption tubes) and passive (diffusion) monitors applied in indoor atmosphere. The results indicated the presence of metallic mercury vaporization sources in the assessed hospital rooms but in the majority of cases mercury levels did not exceed 1 microg/m3 i.e. Polish permissible concentration for residence. However, in some of the hospital rooms, elevated concentrations of mercury vapor were found and airborne levels of up to 13.9 microg/m3 were recorded. Higher concentrations of mercury vapor were observed in autumn season when compared to summer.

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Atmospheric concentrations and deposition of Hg to A deciduous forest atwalker branch watershed, Tennessee, USA

Cited by 103 publications

References 22 publications

Gaseous mercury distribution in the upper troposphere and lower stratosphere observed onboard the CARIBIC passenger aircraft

Gaseous mercury distribution in the upper troposphere and lower stratosphere observed onboard the CARIBIC passenger aircraft

Extractability and Bioavailability of Mercury from a Mercury Sulfide Contaminated Soil in Oak Ridge, Tennessee, USA

Mercury Vapor Determination in Hospitals

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