Gaseous mercury distribution in interstitial air of snow pack in Station Nord, Greenland. Evidence of permanent mercury depletion event in the air of snow during polar sunrise

2003 ◽  
Vol 107 ◽  
pp. 459-462 ◽  
Author(s):  
C. P. Ferrant ◽  
A. Dommergue ◽  
C. F. Boutron
Keyword(s):  
Snow Pack ◽  
Mercury Distribution ◽  
Gaseous Mercury ◽  
Interstitial Air

Dissolve gaseous mercury distribution in a wetland: Influence of macrophyte beds

2003 ◽  
Vol 107 ◽  
pp. 509-512 ◽  
Author(s):  
E. Garcia ◽  
J. Laroulandie ◽  
M. Amyot ◽  
X. R. Saint-Simon
Keyword(s):  
Mercury Distribution ◽  
Gaseous Mercury

Diurnal cycles of interstitial gaseous mercury inside a sub-arctic snow-pack prior to and during snowmelt events

2003 ◽  
Vol 107 ◽  
pp. 389-392
Author(s):  
A. Dommergue ◽  
C. P. Ferrari ◽  
P.-A. Gauchard ◽  
L. Poissant ◽  
C. F. Boutron
Keyword(s):  
Snow Pack ◽  
Diurnal Cycles ◽  
Gaseous Mercury

Nighttime production of elemental gaseous mercury in interstitial air of snow at Station Nord, Greenland

2004 ◽  
Vol 38 (17) ◽  
pp. 2727-2735 ◽  
Author(s):  
Christophe P. Ferrari ◽  
Aurélien Dommergue ◽  
Claude F. Boutron ◽  
Henrik Skov ◽  
Michael Goodsite ◽  
...  
Keyword(s):  
Gaseous Mercury ◽  
Interstitial Air

scholarly journals Formaldehyde (HCHO) in air, snow and interstitial air at Concordia (East Antarctic plateau) in summer

2014 ◽  
Vol 14 (23) ◽  
pp. 32027-32070 ◽  
Author(s):  
S. Preunkert ◽  
M. Legrand ◽  
M. Frey ◽  
A. Kukui ◽  
J. Savarino ◽  
...  
Keyword(s):  
Gas Phase ◽  
Ambient Air ◽  
Snow Surface ◽  
Snow Pack ◽  
Antarctic Plateau ◽  
Mixing Ratios ◽  
Emission Fluxes ◽  
Oxidation Chemistry ◽  
First Time ◽  
Interstitial Air

Abstract. During the 2011/12 and 2012/13 austral summers HCHO was investigated for the first time in ambient air, snow, and interstitial air at the Concordia site located near Dome C on the East Antarctic plateau by deploying an Aerolaser AL-4021 analyser. Snow emission fluxes were estimated from vertical gradients of mixing ratios observed between 1 cm and 1 m above the snow surface as well as between interstitial air a few cm below the surface and in air just above the snow-pack. Typical flux values range between 1 to 2 × 1012 molecules m−2 s−1 at night and 3 to 5 × 1012 molecules m−2 s−1 at noon. Shading experiments suggest that the photochemical HCHO production in the snowpack at Concordia remains negligible compared to temperature-driven air–snow exchanges. At 1 m above the snow surface, the observed mean mixing ratio of 130 pptv and its diurnal cycle characterized by a slight decrease around noon are quite well reproduced by 1-D simulations that include snow emissions and gas phase methane oxidation chemistry.

scholarly journals A Preliminary Study on Dependence of Mercury Distribution on the Degree of Coalification in Ningwu Coalfield, Shanxi, China

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3119
Author(s):  
Yinjiao Su ◽  
Xuan Liu ◽  
Yang Teng ◽  
Kai Zhang
Keyword(s):  
Linear Correlation ◽  
Bituminous Coal ◽  
Rank Correlation ◽  
Correlation Coefficients ◽  
Chemical Extraction ◽  
Mercury Distribution ◽  
Sequential Chemical Extraction ◽  
Average Proportion ◽  
Total Proportion ◽  
The Relationship

Mercury (Hg) is a toxic trace element emitted from coal conversion and utilization. Samples with different coal ranks and gangue from Ningwu Coalfield are selected and investigated in this study. For understanding dependence of mercury distribution characteristics on coalification degree, Pearson regression analysis coupled with Spearman rank correlation is employed to explore the relationship between mercury and sulfur, mercury and ash in coal, and sequential chemical extraction method is adopted to recognize the Hg speciation in the samples of coal and gangue. The measured results show that Hg is positively related to total sulfur content in coal and the affinity of Hg to different sulfur forms varies with the coalification degree. Organic sulfur has the biggest impact on Hg in peat, which becomes weak with increasing the coalification degree from lignite to bituminous coal. Sulfate sulfur is only related to Hg in peat or lignite as little content in coal. However, the Pearson linear correlation coefficients of Hg and pyritic sulfur are relatively high with 0.479 for lignite, 0.709 for sub-bituminous coal and 0.887 for bituminous coal. Hg is also related to ash content in coal, whose Pearson linear correlation coefficients are 0.504, 0.774 and 0.827 respectively, in lignite, sub-bituminous coal and bituminous coal. Furthermore, Hg distribution is directly depended on own speciation in coal. The total proportion of F2 + F3 + F4 is increased from 41.5% in peat to 87.4% in bituminous coal, but the average proportion of F5 is decreased from 56.8% in peat to 12.4% in bituminous coal. The above findings imply that both Hg and sulfur enrich in coal largely due to the migration from organic state to inorganic state with the increase of coalification degree in Ningwu Coalfield.

Mercury Distribution and Deposition in Glacier Snow over Western China

2012 ◽  
Vol 46 (10) ◽  
pp. 5404-5413 ◽  
Author(s):  
Qianggong Zhang ◽  
Jie Huang ◽  
Feiyue Wang ◽  
Loewen Mark ◽  
Jianzhong Xu ◽  
...  
Keyword(s):  
Western China ◽  
Mercury Distribution
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