Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Arsenic in marine sediments from French Mediterranean ports: Geochemical partitioning, bioavailability and ecotoxicology

Abstract : This work investigates arsenic mobility, bioavailability and toxicity in marine port sediments using chemical sequential extraction and laboratory toxicity tests. Sediment samples were collected from two different Mediterranean ports, one highly polluted with arsenic and other inorganic and organic pollutants (Estaque port (EST)), and the other one, less polluted, with a low arsenic content (Saint Mandrier port (SM)). Arsenic distribution in the solid phase was studied using a sequential extraction procedure specifically developed for appraising arsenic mobility in sediments. Toxicity assessment was performed on sediment elutriates, solid phases and aqueous arsenic species as single substance using the embryotoxicity test on oyster larvae (Crassostrea gigas) and the Microtox test with Vibrio fischeri. Toxicity results showed that all sediment samples presented acute and sub-chronic toxic effects on oyster larvae and bacteria, respectively. The Microtox solid phase test allow to discriminate As-contaminated samples from the less contaminated ones, suggesting that toxicity of whole sediment samples is related to arsenic content. Toxicity of dissolved arsenic species as single substance showed that Vibrio fischeri and oyster larvae are most sensitive to As(V) than As(III). The distribution coefficient (Kd) of arsenic in sediment samples was estimated using results obtained in chemical sequential extractions. The Kd value is greater in SM (450 L kg(-1)) than in EST (55 L kg(-1)), indicating that arsenic availability is higher for the most toxic sediment sample (Estaque port). This study demonstrates that arsenic speciation play an important role on arsenic mobility and its bioavailability in marine port sediments
Liste complète des métadonnées
Contributeur : Anne-Marie Pouget Connectez-vous pour contacter le contributeur
Soumis le : jeudi 17 juillet 2014 - 12:17:28
Dernière modification le : mardi 7 décembre 2021 - 16:10:15

Lien texte intégral




Yannick Mamindy-Pajany, Charlotte Hurel, Florence Geret, François Galgani, Fabienne Battaglia-Brunet, et al.. Arsenic in marine sediments from French Mediterranean ports: Geochemical partitioning, bioavailability and ecotoxicology. Chemosphere, Elsevier, 2013, 90 (11), pp.2730-2736. ⟨10.1016/j.chemosphere.2012.11.056⟩. ⟨hal-01025215⟩



Les métriques sont temporairement indisponibles