Production of carbon-containing pyrite spherules induced by hyperthermophilic Thermococcales: a biosignature?

Autor: Chloé Truong, Sylvain Bernard, Pierre Le Pape, Guillaume Morin, Camille Baya, Pauline Merrot, Aurore Gorlas, François Guyot

Publikováno v: Frontiers in Microbiology, Vol 14 (2023)

Thermococcales, a major order of hyperthermophilic archaea inhabiting iron- and sulfur-rich anaerobic parts of hydrothermal deep-sea vents, are known to induce the formation of iron phosphates, greigite (Fe3S4) and abundant quantities of pyrite (FeS2

Externí odkaz: https://doaj.org/article/0168ddf19c834a2e9c21cd52adf3291b

Uranium sorption to organic matter and long-term accumulation in a pristine alpine wetland

Autor: Pierre Lefebvre, Pierre Le Pape, Arnaud Mangeret, Alkiviadis Gourgiotis, Pierre Sabatier, Pascale Louvat, Olivier Diez, Olivier Mathon, Myrtille O.J.Y. Hunault, Camille Baya, Louise Darricau, Charlotte Cazala, John R. Bargar, Jérôme Gaillardet, Guillaume Morin

Publikováno v: Geochimica et Cosmochimica Acta
Geochimica et Cosmochimica Acta, 2022, 338, pp.322-346. ⟨10.1016/j.gca.2022.10.018⟩
Geochimica et cosmochimica acta 338, 322-346 (2022). doi:10.1016/j.gca.2022.10.018

Geochimica et cosmochimica acta 338, 322 - 346 (2022). doi:10.1016/j.gca.2022.10.018
Understanding the controls on uranium (U) mobility in the environment is key to improve the management of sites contaminated by U mining activities. Previous re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7dc16f3092ea78bbbe58363b2a5a849

Diagenetic formation of uranium-silica polymers in lake sediments over 3,300 years

Autor: Mathilde Zebracki, Pascale Louvat, Emmanuel Malet, Pierre Lefebvre, Didier Jézéquel, Pierre Le Pape, Alkiviadis Gourgiotis, John R. Bargar, Pascale Blanchart, Nicolas Menguy, Jean-Louis Reyss, Guillaume Morin, Pauline Merrot, Camille Baya, Charlotte Cazala, Pierre Sabatier, Jérôme Gaillardet, Arnaud Mangeret, Olivier Diez

Publikováno v: 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, 2021, 118 (4), pp.e2021844118. ⟨10.1073/pnas.2021844118⟩
Proceedings of the National Academy of Sciences of the United States of America, 2021, 118 (4), ⟨10.1073/pnas.2021844118⟩
Proceedings of the National Academy of Sciences of the United States of America, 2021, 118 (4), pp.e2021844118. ⟨10.1073/pnas.2021844118⟩
Proc Natl Acad Sci U S A

The long-term fate of uranium-contaminated sediments, especially downstream former mining areas, is a widespread environmental challenge. Essential for their management is the proper understanding of uranium (U) immobilization mechanisms in reducing

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::787926163059acf0215eb25bcf80a234
https://hal.archives-ouvertes.fr/hal-03151596

Pluri-millenial evolution of uranium speciation in lacustrine sediments

Autor: Pierre Sabatier, Emmanuel Malet, Arnaud Mangeret, Didier Jézéquel, Olivier Diez, Mathilde Zebracki, Pascale Louvat, Pierre Le Pape, Pierre Lefebvre, Jérôme Gaillardet, Charlotte Cazala, Pauline Merrot, Guillaume Morin, Alkiviadis Gourgiotis, Jean-Louis Reyss, Camille Baya, John R. Bargar

Publikováno v: European Geosciences Union General Assembly 2020, EGU
European Geosciences Union General Assembly 2020, EGU, May 2020, VIENNE, Austria

Uranium (U) is a toxic radionuclide which environmental dissemination must be limited. In this regard, understanding U immobilization mechanisms in reducing environments is essential for improving the management of radioactive waste and the remediati

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fbba7426e0e3646b0d109154b144272a
https://hal.archives-ouvertes.fr/hal-02894361