Výsledky vyhledávání - "Hélène, Pauwels"

Akademický článek

Assessing CeO2 and TiO2 Nanoparticle Concentrations in the Seine River and Its Tributaries Near Paris

Autor: Karine Phalyvong, Yann Sivry, Hélène Pauwels, Alexandre Gélabert, Mickaël Tharaud, Guillaume Wille, Xavier Bourrat, James F. Ranville, Marc F. Benedetti

Publikováno v: Frontiers in Environmental Science, Vol 8 (2021)

Motivation for detecting engineered nanoparticles (ENPs) in the environment comes from a need to understand fate and behavior of these materials in natural matrices. The difficulty lies in the low expected ENP particle number concentration (PNC) and

Externí odkaz: https://doaj.org/article/03f108e8fb644305ab506c8dc887a052

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Akademický článek

Occurrence and Origins of Cerium Dioxide and Titanium Dioxide Nanoparticles in the Loire River (France) by Single Particle ICP-MS and FEG-SEM Imaging

Autor: Karine Phalyvong, Yann Sivry, Hélène Pauwels, Alexandre Gélabert, Mickaël Tharaud, Guillaume Wille, Xavier Bourrat, Marc F. Benedetti

Publikováno v: Frontiers in Environmental Science, Vol 8 (2020)

The need to quantify engineered nanoparticles (ENPs) in the environment is due to the increasing incorporation of these particles in the daily products, which threatens human health and can possibly impact natural systems. Ceria NPs (CeO2NPs) and tit

Externí odkaz: https://doaj.org/article/72aa54fb12e1441aa9a32c09369f0c10

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Tracer tests applied to nitrate transfer and denitrification studies in a shaly aquifer (Coët-dan basin, Brittany, France)

Autor: Jean-Claude Foucher, Anne Martelat, Hélène Pauwels, W. Kloppmann, Patrick Lachassagne

Publikováno v: Tracer Hydrology 97

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::33f2045116a8031fdd93787f3596248c
https://doi.org/10.1201/9781003078142-55

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Natural attenuation of TiO2 nanoparticles in a fractured hard-rock

Autor: Gilles Braibant, Guillaume Wille, Jérôme Labille, Patrick Ollivier, Nicolas Devau, Hélène Pauwels, Lise Cary, Géraldine Picot-Colbeaux

Publikováno v: Journal of Hazardous Materials
Journal of Hazardous Materials, Elsevier, 2018, 359, pp.47-55. ⟨10.1016/j.jhazmat.2018.07.035⟩
Journal of Hazardous Materials, 2018, 359, pp.47-55. ⟨10.1016/j.jhazmat.2018.07.035⟩

Successive transport experiments of TiO2 nanoparticles (NP) suspension through fractured hard-rock column were done in laboratory. A low ionic strength (IS) water (0.8-1.3 10-3 M) at pH ∼4.5 was used, corresponding to the chemical composition of gr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::01e2bda81cb17627e3872cab9297483f
https://hal.archives-ouvertes.fr/hal-02120384

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Autotrophic denitrification supported by biotite dissolution in crystalline aquifers: (2) transient mixing and denitrification dynamic during long-term pumping

Autor: Laurent Longuevergne, Clément Roques, Jean-Raynald de Dreuzy, Olivier Bour, Luc Aquilina, Alexis Dufresne, Virginie Vergnaud-Ayraud, Thierry Labasque, A. Boisson, Marc Laurencelle, Hélène Pauwels

Publikováno v: Science of the Total Environment
Science of the Total Environment, Elsevier, 2018, 619-620, pp.491-503. ⟨10.1016/j.scitotenv.2017.11.104⟩
Science of the Total Environment, 2018, 619-620, pp.491-503. ⟨10.1016/j.scitotenv.2017.11.104⟩

International audience; We investigated the mixing and dynamic of denitrification processes induced by long-term pumping in the crystalline aquifer of Ploemeur (Brittany, France). Hydrological and geochemical parameters have been continuously recorde

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bb5653d1b9ac863a231328dc2dab3d1
https://hal-insu.archives-ouvertes.fr/insu-01653141

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Autotrophic denitrification supported by biotite dissolution in crystalline aquifers (1): New insights from short-term batch experiments

Autor: Virginie Vergnaud-Ayraud, Luc Aquilina, Hélène Pauwels, A. Boisson, Lorine Bethencourt, Clément Roques, Marie Pettenati, Olivier Bour, Alexis Dufresne, Thierry Labasque, Emmanuelle Petelet-Giraud

Publikováno v: Science of the Total Environment
Science of the Total Environment, Elsevier, 2018, 619-620, pp.842-853. ⟨10.1016/j.scitotenv.2017.11.079⟩
Science of the Total Environment, 2018, 619-620, pp.842-853. ⟨10.1016/j.scitotenv.2017.11.079⟩

International audience; We investigate denitrification mechanisms through batch experiments using crushed rock and groundwater from a granitic aquifer subject to long term pumping (Ploemeur, France). Except for sterilized experiments, extensive denit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f5f59607271d90bbcb24b58590367a6
https://hal-insu.archives-ouvertes.fr/insu-01652576

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Natural attenuation of TiO

Autor: Patrick, Ollivier, Hélène, Pauwels, Guillaume, Wille, Nicolas, Devau, Gilles, Braibant, Lise, Cary, Géraldine, Picot-Colbeaux, Jérôme, Labille

Publikováno v: Journal of hazardous materials. 359

Successive transport experiments of TiO

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::190b2d6729c1f1d4b2aca5b7be1f725f
https://pubmed.ncbi.nlm.nih.gov/30014914

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Hydrochemical borehole logs characterizing fluoride contamination in a crystalline aquifer (Maheshwaram, India)

Autor: Stéphane Roy, Cédric Mascré, Jérôme Perrin, Hélène Pauwels, Shakeel Ahmed, Benoît Dewandel, Philippe Négrel

Publikováno v: Journal of Environmental Hydrology
Journal of Environmental Hydrology, International Association for Environmental Hydrology, 2015, 525, pp. 302-312. ⟨10.1016/j.jhydrol.2015.03.017⟩

International audience; Hydrochemical borehole-loggings with a submersible Idronaut Ocean Seven 302 multiparameter probe equipped of F- and NO3-ion-selective electrodes in combination with EC, pH and dissolved oxygen, were applied for characterizing

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd9cf59faecc30d88dfb4b64ed16d45e
https://doi.org/10.1016/j.jhydrol.2015.03.017

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Extreme Boron Isotope Ratios in Groundwater

Autor: Wolfram Kloppmann, Lise Cary, Emmanuelle Petelet-Giraud, Catherine Guerrot, Hélène Pauwels

Publikováno v: Procedia Earth and Planetary Science. 13:296-300

Examples of “extreme” boron isotope ratios in groundwaters are presented, both in the positive δ 11 B range (up to +75‰) and negative range (down to -30‰) relative to the “typical” δ 11 B groundwater values of -10‰ to +40‰. A concep

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe00ff359b711d5792cbea90414ce8f5

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Water exchange, mixing and transient storage between a saturated karstic conduit and the surrounding aquifer: groundwater flow modeling and inputs from stable water isotopes

Autor: Ary Bruand, Emmanuelle Joigneaux, Hélène Pauwels, Stéphane Binet, Patrick Albéric, Christine Flehoc

Publikováno v: Journal of Hydrology
Journal of Hydrology, Elsevier, 2017, 544, pp.278-289. ⟨10.1016/j.jhydrol.2016.11.042⟩
Journal of Hydrology, 2017, 544, pp.278-289. ⟨10.1016/j.jhydrol.2016.11.042⟩

International audience; Water exchanges between a karstic conduit and the surrounding aquifer are driven by hydraulic head gradient at the interface between these two domains. The case-study presented in this paper investigates the impact of the geom

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34ecc966f1e6b202ca5eae525a386fd3
https://hal-insu.archives-ouvertes.fr/insu-01402456/file/1-s2.0-S002216941630748X-main.pdf

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