scholarly journals Solution Speciation Controls Mercury Isotope Fractionation of Hg(II) Sorption to Goethite

2012 ◽  
Vol 46 (12) ◽  
pp. 6654-6662 ◽  
Author(s):  
Martin Jiskra ◽  
Jan G. Wiederhold ◽  
Bernard Bourdon ◽  
Ruben Kretzschmar
Keyword(s):  
Isotope Fractionation ◽  
Mercury Isotope ◽  
Solution Speciation

Denitrification devices in urban boilers change mercury isotope fractionation signatures of coal combustion products

2021 ◽  
Vol 268 ◽  
pp. 115753
Author(s):  
Jingjing Yuan ◽  
Ruoyu Sun ◽  
Ruwei Wang ◽  
Biao Fu ◽  
Mei Meng ◽  
...  
Keyword(s):  
Coal Combustion ◽  
Isotope Fractionation ◽  
Combustion Products ◽  
Mercury Isotope ◽  
Coal Combustion Products

scholarly journals Mercury isotope signatures record photic zone euxinia in the Mesoproterozoic ocean

2018 ◽  
Vol 115 (42) ◽  
pp. 10594-10599 ◽  
Author(s):  
Wang Zheng ◽  
Geoffrey J. Gilleaudeau ◽  
Linda C. Kah ◽  
Ariel D. Anbar
Keyword(s):  
Isotope Fractionation ◽  
Sedimentary Rocks ◽  
Early Earth ◽  
Photic Zone ◽  
Mass Extinctions ◽  
Mercury Isotope ◽  
Independent Evidence ◽  
Surface Ocean ◽  
Negative Shift ◽  
Evolution Of Life

Photic zone euxinia (PZE) is a condition where anoxic, H2S-rich waters occur in the photic zone (PZ). PZE has been invoked as an impediment to the evolution of complex life on early Earth and as a kill mechanism for Phanerozoic mass extinctions. Here, we investigate the potential application of mercury (Hg) stable isotopes in marine sedimentary rocks as a proxy for PZE by measuring Hg isotope compositions in late Mesoproterozoic (∼1.1 Ga) shales that have independent evidence of PZE during discrete intervals. Strikingly, a significantly negative shift of Hg mass-independent isotope fractionation (MIF) was observed during euxinic intervals, suggesting changes in Hg sources or transformations in oceans coincident with the development of PZE. We propose that the negative shift of Hg MIF was most likely caused by (i) photoreduction of Hg(II) complexed by reduced sulfur ligands in a sulfide-rich PZ, and (ii) enhanced sequestration of atmospheric Hg(0) to the sediments by thiols and sulfide that were enriched in the surface ocean as a result of PZE. This study thus demonstrates that Hg isotope compositions in ancient marine sedimentary rocks can be a promising proxy for PZE and therefore may provide valuable insights into changes in ocean chemistry and its impact on the evolution of life.

Mercury isotope fractionation during liquid–vapor evaporation experiments

2009 ◽  
Vol 73 (10) ◽  
pp. 2693-2711 ◽  
Author(s):  
Nicolas Estrade ◽  
Jean Carignan ◽  
Jeroen E. Sonke ◽  
Olivier F.X. Donard
Keyword(s):  
Isotope Fractionation ◽  
Mercury Isotope ◽  
Liquid Vapor

scholarly journals Experimental determination of kinetic mercury isotope fractionation during reduction of Hg(II) by dissolved Fe(II) and Fe(II)-bearing minerals

2021 ◽  
Author(s):  
Lorenz Schwab ◽  
Niklas Gallati ◽  
David McLagan ◽  
Stephan Kraemer ◽  
Harald Biester ◽  
...  
Keyword(s):  
Experimental Determination ◽  
Isotope Fractionation ◽  
Mercury Isotope

Mercury Isotope Fractionation during Precipitation of Metacinnabar (β-HgS) and Montroydite (HgO)

2015 ◽  
Vol 49 (7) ◽  
pp. 4325-4334 ◽  
Author(s):  
Robin S. Smith ◽  
Jan G. Wiederhold ◽  
Ruben Kretzschmar
Keyword(s):  
Isotope Fractionation ◽  
Mercury Isotope

Equilibrium Mercury Isotope Fractionation between Dissolved Hg(II) Species and Thiol-Bound Hg

2010 ◽  
Vol 44 (11) ◽  
pp. 4191-4197 ◽  
Author(s):  
Jan G. Wiederhold ◽  
Christopher J. Cramer ◽  
Kelly Daniel ◽  
Ivan Infante ◽  
Bernard Bourdon ◽  
...  
Keyword(s):  
Isotope Fractionation ◽  
Mercury Isotope
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