Search

Your search keyword '"Gréau, Claire"' showing total 10 results
Start Over Author "Gréau, Claire"
10 results on '"Gréau, Claire"'

4. Report on the results from the on-site comparison of indoor radon measurements and geogenic radon measurements under field conditions

Author

Cinelli, Giorgia, S. Baumann, Bossew, Peter, S. Celaya, A. Fernandez, E. Fernandez, Fuente, Ismael, Gréau, Claire, Gruber, Valeria, Ielsch, Géraldine, F. J. Maringer, E. Petermann, Sanchez, Ricardo Pol, L. Quindos, J. Quindos, Rábago, Daniel, Sainz, Carlos, Stietka, Michael, Wiedner, Hannah, and Benoit Sabot

Published
2020
Full Text
View/download PDF

7. The Syabru-Bensi hydrothermal system in central Nepal: 1. Characterization of carbon dioxide and radon fluxes

Author

Girault, Frédéric, Perrier, Frédéric, Crockett, Robin, Bhattarai, Mukunda, Koirala, Bharat Prasad, France-Lanord, Christian, Agrinier, Pierre, Ader, Magali, Fluteau, Frédéric, Gréau, Claire, Moreira, Manuel, Institut de Physique du Globe de Paris (IPGP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de géologie de l'ENS (LGENS), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Department of Environmental and Geographical Sciences [Northampton], School of Science and Technology [Northampton], University of Northampton-University of Northampton, National Seismic Centre, Nepal, Department of Mines and Geology, Centre de Recherches Pétrographiques et Géochimiques (CRPG), and Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDU]Sciences of the Universe [physics]
Abstract

International audience; The Syabru-Bensi hydrothermal system (SBHS), located at the Main Central Thrust zone in central Nepal, is characterized by hot (30–62°C) water springs and cold (

Published
2014

9. Hydrogeochemical survey of CO2 geological leakage using noble gases: application to the Furnas Caldera (Azores, Portugual)

Author

Gréau, Claire, Moreira, Manuel, Agrinier, Pierre, Lagneau, Vincent, Schneider, Henri, Madureira, Pedro, Ruzié, Lorraine, Institut de Physique du Globe de Paris (IPGP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), Université Paris Diderot - Paris 7 (UPD7), Centre de Géosciences (GEOSCIENCES), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), EDF R&D (EDF R&D), EDF (EDF), Centro de Geofísica de Évora, and Universidade de Évora

Subjects
CO2 monitoring, [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry, [SDE.MCG]Environmental Sciences/Global Changes, noble gases, Azores
Abstract

Significant natural CO2 emissions have been measured across the caldera of Furnas (São Miguel Island, Azores) allowing us to consider the area as a CO2 leakage analogue. During two field trips, we have collected twenty springs in purpose to measure CO2 contents (Dissolved Inorganic Carbon and δ13C) and noble gas isotopic compositions (He and Ne) and for seventeen water samples, major ions chemistry. The corrected 3He/4He ratios (normalized to air ratio RA) range from 1.46 to 5.17, the carbon contents (DIC) range from 0.57 to 41,41 mmol/l and most of the waters have a δ13C about -4 ‰. With field observations and waters chemistry, we have characterized seven different types of water springs through the caldera, resulting from various mixing rates between three sources : soil equilibrated meteoritic water, gas emanations (CO2, He...) from a magmatic intrusion and hydrothemal waters coming from a shallow depth aquifer. Saturation indexes and geothermometers indicate a trachytic aquifer at a temperature of about 145°C. In order to confirm that noble gases are good tracers of CO2 leakage, we are building a first mixing model using noble gases and carbon isotopes and a second one based on major ions chemistry with CHESS hydrochemical modelling software. Preliminary mixing models seem to be consistent thus confirming that noble gases can be used as tracors of CO2 leakage.

Published
2011

10. Breakthrough in Xenon Capture and Purification Using Adsorbent-Supported Silver Nanoparticles.

Author

Deliere L, Coasne B, Topin S, Gréau C, Moulin C, and Farrusseng D

Abstract

Rare gas capture and purification is a major challenge for energy, environment, and health applications. Of utmost importance for the nuclear industry, novel separation processes for Xe are urgently needed for spent nuclear fuel reprocessing and nuclear activity monitoring. The recovered, non-radioactive Xe is also of high economic value for lighting, surgical anesthetic, etc. Here, using adsorption and breakthrough experiments and statistical mechanics molecular simulation, we show the outstanding performance of zeolite-supported silver nanoparticles to capture/separate Xe at low concentrations (0.087-100 ppm). We also establish the efficiency of temperature swing adsorption based on such adsorbents for Xe separation from Kr/Xe mixtures and air streams corresponding to off-gases generated by nuclear reprocessing. This study paves the way for the development of novel, cost-efficient technologies relying on the large selectivity/capacity of adsorbent-supported silver nanoparticles which surpass all materials ever tested., (© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Published
2016
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results