| HAL : hal-00593239, version 1 |
| DOI : 10.1016/j.crte.2010.11.005 |
| Fiche détaillée | Récupérer au format |
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| Comptes Rendus Géosciences 343, 2-3 (2011) pp.123-139 |
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| Reactivity at (nano)particle-water interfaces, redox processes, and arsenic transport in the environment. |
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| Laurent Charlet 1Guillaume Morin 2 |
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| (2011) |
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| Massive deleterious impacts to human health are resulting from the use of arsenic-bearing groundwaters in South-East Asia deltas and elsewhere in the world for drinking, cooking and/or irrigation. In Bangladesh alone, a fifth of all deaths are linked to arsenicosis. In the natural and engineered subsurface environment, the fate of arsenic is, to a large extent, controlled by redox potential, pH, as well as total iron, sulfur and carbonate content, via sorption and coprecipitation on a variety of natural and engineered (nano)particles. In the present article, we address: (1) new insights in the sorption mechanisms of As on Fe(II) and Fe(III) nanophases recognized to play an important role in the microbial cycling of As and Fe; (2) artifacts often encountered in field and laboratory studies of As speciation due to the extreme redox sensitivity of the Fe-As-O-H phases; and (3) as a conclusion, the implications for water treatment. Indeed the specific reactivity of nanoparticles accounts not only for the As bioavailability within soils and aquifers, but also opens new avenues in water treatment. |
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| 1 : | Institut des sciences de la Terre (ISTerre) |
| CNRS : UMR5275 – IFSTTAR – Université de Savoie – Université Joseph Fourier - Grenoble I – INSU – OSUG – Institut de recherche pour le développement [IRD] : UR219 | |
| 2 : | Institut de minéralogie et de physique des milieux condensés (IMPMC) |
| CNRS : UMR7590 – IPG PARIS – Université Pierre et Marie Curie [UPMC] - Paris VI – Université Paris VII - Paris Diderot | |
| 3 : | Centre européen de recherche et d'enseignement de géosciences de l'environnement (CEREGE) |
| CNRS : UMR6635 – Institut de recherche pour le développement [IRD] – INSU – Université de Provence - Aix-Marseille I – Université Paul Cézanne - Aix-Marseille III | |
| 4 : | Bureau de recherches géologiques et minières (BRGM) |
| Bureau de Recherches Géologiques et Minières (BRGM) | |
| 5 : | Lawrence Berkeley National Laboratory (LBNL) |
| Lawrence Berkeley National Lab | |
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| Géochimie 4D |
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| Domaine | : | Planète et Univers/Sciences de la Terre/Géochimie Planète et Univers/Sciences de la Terre/Minéralogie Planète et Univers/Interfaces continentales, environnement Sciences de l'environnement/Milieux et Changements globaux |
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| Arsenic – Aquifers – Bioavailability – Water treatment – Speciation – Adsorption – Experimental artifacts – Molecular mechanism – XAFS spectroscopy – Molecular dynamics |
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| Liste des fichiers attachés à ce document : | |||||
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| hal-00593239, version 1 | |
| http://hal-brgm.archives-ouvertes.fr/hal-00593239 | |
| oai:hal-brgm.archives-ouvertes.fr:hal-00593239 | |
| Contributeur : André Burnol | |
| Soumis le : Vendredi 13 Mai 2011, 16:31:11 | |
| Dernière modification le : Lundi 26 Mars 2012, 12:47:08 | |