scholarly journals Measurement of Gaseous Elemental Mercury Concentration by Passive Sampler

2017 ◽  
Vol 46 (4) ◽  
pp. 208-214
Author(s):  
Toshihiko MATSUI ◽  
Nobuaki HARAI ◽  
Katsumi SAITOH ◽  
Koyomi NAKAZAWA ◽  
Osamu NAGAFUCHI
Keyword(s):  
Mercury Concentration ◽  
Elemental Mercury ◽  
Passive Sampler ◽  
Gaseous Elemental Mercury

Dynamics of gaseous elemental mercury during polar spring and winter

2020 ◽  
Author(s):  
Fidel Pankratov ◽  
Alexander Mahura ◽  
Valentin Popov ◽  
Vladimir Masloboev
Keyword(s):  
Surface Layer ◽  
Solar Activity ◽  
Solar Radiation ◽  
Solar Energy ◽  
Mercury Concentration ◽  
Elemental Mercury ◽  
Ice Cover ◽  
Photochemical Reactions ◽  
High Solar Activity ◽  
Gaseous Elemental Mercury

<p><strong>Dynamics of gaseous elemental mercury during polar spring and winter</strong></p><p>Since June 2001 the long-term monitoring of the gaseous elemental mercury (thereafter, mercury) in the surface layer of the atmospheric has been conducted near the Amderma settlement (69,72<sup>о</sup>N; 61,62<sup>o</sup>E; Yugor Peninsula, Russia).</p><p>During this monitoring, variations of the lowered mercury concentrations (<1.0 ng m<sup>-3</sup>) were observed for spring (March–May) period in 2005 and 2011. For spring 2005, the intensity of the solar radiation did not affect the number of low values of mercury concentrations. With an increase of solar activity during the day there was a reverse effect: i.e. from 9 until 15 h the number of lowered values of concentration decreased. For the evening hours, the highest number of lowered concentrations and atmospheric mercury depletion events, AMDEs (12 events) were observed. For 2005, upon reaching a daily high solar activity the processes of mercury depletion were not observed. It could be because lacking of a large number of marine aerosols in the atmospheric surface layer, although the processes of photochemical reactions did not stop. For spring 2011, during increased solar activity the number of AMDEs increased to 62 events. However, there was no ice cover observed in the coastal area, and consequently, large amounts of sea aerosol could be presented in the surface layer of the atmosphere.</p><p>For the winter (December-January) period, the maximum number (in total, 495) of lowered values of mercury concentration and AMDEs (32 events) were recorded in 2010–2011. Such situation was previously observed only in winter of 2006–2007 (13 events). As there is no direct sunlight in mentioned period, the removal of mercury from the atmosphere may be caused by combination of physical and chemical processes that are not related to photochemistry. Starting mid-January, although duration of the day increases, but solar energy is not enough to activate photochemical reactions and predominant type of solar radiation is diffuse rather than direct one. However, AMDEs were still reported at that time (18 events were registered in January 2011).</p><p>After mid-March, the angle of sun’s declination increases and the incoming solar energy is sufficient to activate photochemistry. However, during March–May there was no linear relationship identified for AMDEs. The maximum number (300) of lowered values of mercury concentration and AMDEs (21 events, with duration up to 66 hours) were registered in April. Such AMDEs are connected with presence of elevated concentrations of aerosols in the absence of ice cover in the marine coastal zone. Not excluded a possibility of contribution of anthropogenic aerosols (from burning of fossil fuels) in the process of mercury deposition from the atmosphere on the underlying surface.</p>

scholarly journals Application of the Passive Sampler Developed for Atmospheric Mercury and Its Limitation

Atmosphere ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 678 ◽  
Author(s):  
Ji-Won Jeon ◽  
Young-Ji Han ◽  
Seung-Hwan Cha ◽  
Pyung-Rae Kim ◽  
Young-Hee Kim ◽  
...  
Keyword(s):  
Molecular Diffusion ◽  
Sampling Rate ◽  
Elemental Mercury ◽  
Field Monitoring ◽  
Atmospheric Mercury ◽  
Passive Sampler ◽  
Future Research ◽  
Model Parameters ◽  
Gaseous Elemental Mercury ◽  
Deployment Time

In this study, a passive sampler for gaseous elemental mercury (GEM) was developed and applied to field monitoring. Three Radiello® diffusive bodies with gold-coated beads as Hg adsorbent were installed in an acrylic external shield. Hg uptake mass linearly increased as the deployment time increased until 8 weeks with an average gaseous Hg concentration of 2 ng m−3. The average of the experimental sampling rate (SR) was 0.083 m3 day−1 and showed a good correlation with theoretical SRs, indicating that a major adsorption mechanism was molecular diffusion. Nonetheless, the experimental SR was approximately 33% lower than the modeled SR, which could be associated with inefficient uptake of GEM in the sampler or uncertainty in constraining model parameters. It was shown that the experimental SR was statistically affected by temperature and wind speed but the calibration equation for the SR by meteorological variables should be obtained with a wider range of variables in further investigation. When the uptake rates were compared to the active Hg measurements, the correlation was not significant because the passive sampler was not sufficiently adept at detecting a small difference in the GEM concentration of from 1.8 to 2.0 ng m−3. However, the results for spatial Hg concentrations measured near cement plants in Korea suggest a possible application in field monitoring. Future research is needed to fully employ the developed passive sampler in quantitative assessment of Hg concentrations.

scholarly journals Gaseous elemental mercury concentration in atmosphere at urban and remote sites in China

2007 ◽  
Vol 19 (2) ◽  
pp. 176-180 ◽  
Author(s):  
Zhang-wei WANG ◽  
Zuo-shuai CHEN ◽  
Ning DUAN ◽  
Xiao-shan ZHANG
Keyword(s):  
Mercury Concentration ◽  
Elemental Mercury ◽  
Gaseous Elemental Mercury ◽  
Remote Sites

Oxidation Removal of Elemental Mercury from Flue Gas by K2S2O8

2012 ◽  
Vol 209-211 ◽  
pp. 1549-1552
Author(s):  
Sheng Yu Liu ◽  
Ping Liu ◽  
Li Chao Nengzi ◽  
Wei Qiu ◽  
Cheng Wei Lu
Keyword(s):  
Mercury Concentration ◽  
Flue Gas ◽  
Removal Rate ◽  
Elemental Mercury ◽  
Chemical Form ◽  
Water Soluble ◽  
Mercury Removal ◽  
Reaction Velocity ◽  
Gaseous Elemental Mercury ◽  
Wet Scrubber

The important step for increasing gaseous elemental mercury (Hg0) removal in wet scrubber systems is altering the chemical form of the Hg0to a water-soluble oxidized species. This work focuses on the removal of elemental mercury from simulated flue gas by aqueous K2S2O8in a bubble reactor. In the system of K2S2O8oxidize Hg0, the reaction velocity of K2S2O8and Hg0is soon. Reached a higher removal rate after 10min. Increase the concentration of K2S2O8can remarkably improve the removal rate of Hg0to 85% With the rise of import mercury concentration has increased mercury removal rate to 89.5%.

scholarly journals Development, characterization, and testing of a personal passive sampler for measuring inhalation exposure to gaseous elemental mercury

2021 ◽  
Vol 146 ◽  
pp. 106264
Author(s):  
Melanie A. Snow ◽  
Michelle Feigis ◽  
Ying Duan Lei ◽  
Carl P.J. Mitchell ◽  
Frank Wania
Keyword(s):  
Inhalation Exposure ◽  
Elemental Mercury ◽  
Passive Sampler ◽  
Gaseous Elemental Mercury

scholarly journals Proof of concept for a passive sampler for monitoring of gaseous elemental mercury in artisanal gold mining

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Elias de Barros Santos ◽  
Paleah Moher ◽  
Stacy Ferlin ◽  
Anne Hélène Fostier ◽  
Italo Odone Mazali ◽  
...  
Keyword(s):  
Gold Mining ◽  
Elemental Mercury ◽  
Passive Sampler ◽  
Proof Of Concept ◽  
Gaseous Elemental Mercury ◽  
Artisanal Gold Mining

scholarly journals Air Concentrations of Gaseous Elemental Mercury and Vegetation–Air Fluxes within Saltmarshes of the Tagus Estuary, Portugal

Atmosphere ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 228
Author(s):  
Rute Cesário ◽  
Nelson J. O’Driscoll ◽  
Sara Justino ◽  
Claire E. Wilson ◽  
Carlos E. Monteiro ◽  
...  
Keyword(s):  
Leaf Area ◽  
Elemental Mercury ◽  
Ambient Air ◽  
Tagus Estuary ◽  
Contaminated Site ◽  
Gaseous Elemental Mercury ◽  
Mercury Flux ◽  
Sarcocornia Fruticosa ◽  
Air Concentrations

In situ air concentrations of gaseous elemental mercury (Hg(0)) and vegetation–atmosphere fluxes were quantified in both high (Cala Norte, CN) and low-to-moderate (Alcochete, ALC) Hg-contaminated saltmarsh areas of the Tagus estuary colonized by plant species Halimione portulacoides (Hp) and Sarcocornia fruticosa (Sf). Atmospheric Hg(0) ranged between 1.08–18.15 ng m−3 in CN and 1.18–3.53 ng m−3 in ALC. In CN, most of the high Hg(0) levels occurred during nighttime, while the opposite was observed at ALC, suggesting that photoreduction was not driving the air Hg(0) concentrations at the contaminated site. Vegetation–air Hg(0) fluxes were low in ALC and ranged from −0.76 to 1.52 ng m−2 (leaf area) h−1 for Hp and from −0.40 to 1.28 ng m−2 (leaf area) h−1 for Sf. In CN, higher Hg fluxes were observed for both plants, ranging from −9.90 to 15.45 ng m−2 (leaf area) h−1 for Hp and from −8.93 to 12.58 ng m−2 (leaf area) h−1 for Sf. Mercury flux results at CN were considered less reliable due to large and fast variations in the ambient air concentrations of Hg(0), which may have been influenced by emissions from the nearby chlor-alkali plant, or historical contamination. Improved experimental setup, the influence of high local Hg concentrations and the seasonal activity of the plants must be considered when assessing vegetation–air Hg(0) fluxes in Hg-contaminated areas.

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