Photoreduction of gaseous oxidized mercury changes global atmospheric mercury speciation, transport and deposition

Autor: Alfonso Saiz-Lopez, Sebastian P. Sitkiewicz, Daniel Roca-Sanjuán, Josep M. Oliva-Enrich, Juan Z. Dávalos, Rafael Notario, Martin Jiskra, Yang Xu, Feiyue Wang, Colin P. Thackray, Elsie M. Sunderland, Daniel J. Jacob, Oleg Travnikov, Carlos A. Cuevas, A. Ulises Acuña, Daniel Rivero, John M. C. Plane, Douglas E. Kinnison, Jeroen E. Sonke

Publikováno v: Nature Communications, Vol 9, Iss 1, Pp 1-9 (2018)

Reduction of gaseous Hg(II) compounds drives atmospheric mercury wet and dry deposition to Earth surface ecosystems. Global Hg models assume this reduction takes place in clouds. Here the authors report a new gas-phase Hg photochemical mechanism that

Externí odkaz: https://doaj.org/article/eae85893d2da4cf39b5be44bd3083594

Reply to the ‘Comment on 'Theoretical study of the NO3 radical reaction with CH2ClBr, CH2ICl, CH2BrI, CHCl2Br, and CHClBr2'’ by C. J. Nielsen and Y. Tang, Phys. Chem. Chem. Phys., 2022, 24, DOI: 10.1039/D2CP03013F

Autor: Ibon Alkorta, John M. C. Plane, José Elguero, Juan Z. Dávalos, A. Ulises Acuña, Alfonso Saiz-Lopez

Publikováno v: Physical Chemistry Chemical Physics. 25:4357-4358

49 DFT functionals have been used to check NO3 radical and reactions involving it. The recalculate barriers of the reaction of NO3 with CH2ClBr, CH2ICl, CH2BrI, CHCl2Br, and CHClBr2 show differences of 10.5 kJ mol−1 to those obtained with M08HX.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5b89a23842bf943922170b6a11d0a5e7
https://doi.org/10.1039/d2cp04659h

Photochemistry of oxidized Hg(I) and Hg(II) species suggests missing mercury oxidation in the troposphere

Autor: Alfonso Saiz-Lopez, Martin Jiskra, Joseph S. Francisco, Daniel Roca-Sanjuán, John M. C. Plane, Daniel J. Jacob, Jeroen E. Sonke, Johannes Bieser, Feiyue Wang, Antonio Francés-Monerris, Colin P. Thackray, Javier Carmona-García, Juan Z. Dávalos, A. Ulises Acuña, Carlos A. Cuevas, Oleg Travnikov

Publikováno v: Proc Natl Acad Sci U S A
Proceedings of the National Academy of Sciences of the United States of America
Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2020, 117 (49), pp.30949-30956. ⟨10.1073/pnas.1922486117⟩
Proceedings of the National Academy of Sciences of the United States of America, 2020, 117 (49), pp.30949-30956. ⟨10.1073/pnas.1922486117⟩
Digital.CSIC. Repositorio Institucional del CSIC
instname

8 pags., 5 figs., 2 tabs.
Mercury (Hg), a global contaminant, is emitted mainly in its elemental form Hgto the atmosphere where it is oxidized to reactive Hgcompounds, which efficiently deposit to surface ecosystems. Therefore, the chemical cycl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b2f826552a451c8e22c993262a9bccc3
https://pubmed.ncbi.nlm.nih.gov/34312241

Photodissociation Mechanisms of Major Mercury(II) Species in the Atmospheric Chemical Cycle of Mercury

Autor: Javier Carmona-García, Juan Z. Dávalos, Joseph S. Francisco, Alfonso Saiz-Lopez, A. Ulises Acuña, Carlos A. Cuevas, Daniel Roca-Sanjuán, Antonio Francés-Monerris, Douglas E. Kinnison

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
instname
Angewandte Chemie International Edition

7 pags., 4 figs.
Mercury is a contaminant of global concern that is transported throughout the atmosphere as elemental mercury Hg and its oxidized forms Hg and Hg. The efficient gas-phase photolysis of Hg and Hg has recently been reported. Howev

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e100e610ef47e59ab2576c47814ad8f
http://hdl.handle.net/10261/206508

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