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Comparaison d'extractions séquentielles et cinétiques pour la spéciation de As dans les sols sableux contaminés

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.
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Submitted on : Sunday, May 31, 2020 - 10:30:56 PM
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Sophie S. Cornu, David Montagne, Pierre Conil. Comparaison d'extractions séquentielles et cinétiques pour la spéciation de As dans les sols sableux contaminés. Comptes Rendus Géoscience, Elsevier, 2004, 336 (11), pp.1007-1015. ⟨10.1016/j.crte.2004.03.010⟩. ⟨hal-02680644⟩

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