Comparaison d'extractions séquentielles et cinétiques pour la spéciation de As dans des sols sableux contaminés |
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| Authors: | Sophie Cornu David Montagne Pierre Conil |
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| Institution: | 1. Unité de recherche en science du sol, Inra Orléans, av. de la Pomme-de-Pin, BP 20619, 45166 Olivet cedex, France;2. BRGM Pays de la Loire, 1, rue des Saumonières, 44000 Nantes, France |
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| Abstract: | We compared the results obtained by sequential extraction combined with physical fractionation to those obtained by kinetics for As speciation in slightly polluted soils through irrigation. The soil samples were sieved through a 50-μm mesh. Particulate organic matter was manually sorted and joined to the less than 50-μm fractions. This last fraction was sequentially extracted with phosphates, NaOH and hydroxylamine + acetic acid at 90 °C. Kinetic extractions by EDTA were also performed on whole samples. Results show that As originating from irrigation was rather mobile. The different compartments defined by the sequential extraction were in agreement with those defines by kinetics. To cite this article: S. Cornu et al., C. R. Geoscience 336 (2004). |
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| Keywords: | arsenic extractions séquentielles extractions cinétiques spéciation sols contaminés arsenic sequential extraction kinetic extractions speciation contaminated soils |
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