Mobility of natural and engineered nanoparticles in aquatic media

Masion Armand, Levard Clément, Solovitch N., Diot M.A., Auffan Mélanie, Botta C., Labille J., Rose Jérôme, Chaurand Perrine, Borschneck Daniel, Doelsch Emmanuel, Ziarelli Fabio, Thill A., Bottero Jean Yves. 2010. Mobility of natural and engineered nanoparticles in aquatic media. Geochimica et Cosmochimica Acta, 74 (12), suppl. 1 : A674-A674. Goldschmidt Earth, energy and the environment 2010, Knoxville, États-Unis, 13 Juin 2010/18 Juin 2010.

Quartile : Q1, Sujet : GEOCHEMISTRY & GEOPHYSICS

Note générale : Emmanuel Doelsch est l'expert invité du Cirad pour la conférence

Résumé : The extent to which nanoparticles may impact the environment is largely dependent on their mobility in soils and in surface and groundwater systems. Size and aggregation/dispersion state are obvious parameters, whose determination (and prediction) requires a detailed knowledge of the surface chemistry of the nanophases and their reactivity with a variety of organic and inorganic nutrients and pollutants, taking into account possible competition between ligands. Hydrophobicity is another important parameter to take into consideration. The hydrophobicity can be either intrinsic (e.g. fullerene) or acquired (intentional coating during manufacturing or reaction with natural organics), and this hydrophobic quality may evolve during transport in the environment. Here we examine the mechanisms by which even minor changes in the physico-chemical conditions may results in drastic modifications of the ability of nanoparticles to be transported in environmental systems. The present work will focus on commercially available products, viz. C60, TiO2 and CeO2 based nanomaterials, as well as naturally occurring nanostructured alumino-silicates. The transformations at the surface of this nanomaterials and the structure and mobility of the resulting phases have been examined by several analytical tools (TEM, X-ray absorption and scattering, NMR...) so as to obtain an observation scale spanning over at least three orders of magnitude. The results underline the difficulty to obtain a global view of the phenomena due to competing mechanisms.

Mots-clés Agrovoc : milieu aquatique

Mots-clés complémentaires : Nanoparticule

Classification Agris : M40 - Écologie aquatique
P02 - Pollution
000 - Autres thèmes

Champ stratégique Cirad : Hors axes (2005-2013)

Auteurs et affiliations

• Masion Armand, CNRS (FRA)
• Levard Clément, CNRS (FRA)
• Solovitch N., Université Paul Cézanne (FRA)
• Diot M.A., Université Paul Cézanne (FRA)
• Auffan Mélanie, Université Paul Cézanne (FRA)
• Botta C., Université Paul Cézanne (FRA)
• Labille J., Université Paul Cézanne (FRA)
• Rose Jérôme, CNRS (FRA)
• Chaurand Perrine, Université Paul Cézanne (FRA)
• Borschneck Daniel, Université Paul Cézanne (FRA)
• Doelsch Emmanuel, CIRAD-PERSYST-UPR Recyclage et risque (FRA) ORCID: 0000-0002-7478-4296
• Ziarelli Fabio, CNRS (FRA)
• Thill A., CEA (FRA)
• Bottero Jean Yves, CNRS (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/558483/)

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