Consulta: subjectFacets:"Chemical sequential extraction"
Registros recuperados: 2
Data/hora: 06/06/2024 00:21:03

Arsenic in marine sediments from French Mediterranean ports: Geochemical partitioning, bioavailability and ecotoxicology
Provedor de dados: 5
Autores: Mamindy-pajany, Yannick; Hurel, Charlotte; Geret, Florence; Galgani, Francois; Battaglia-brunet, Fabienne; Marmier, Nicolas; Romeo, Michele.
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...
Tipo: Text
Palavras-chave: Arsenic speciation; Chemical sequential extraction; Embryo-toxicity test; Marine sediment; Microtox toxicity test; Pollutant bioavailability.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00127/23820/22580.pdf

Bioavailability of particulate metal to zebra mussels: Biodynamic modelling shows that assimilation efficiencies are site-specific
Provedor de dados: 5
Autores: Bourgeault, Adeline; Gourlay-france, Catherine; Priadi, Cindy; Ayrault, Sophie; Tusseau-vuillemin, Marie-helene.
This study investigates the ability of the biodynamic model to predict the trophic bioaccumulation of cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni) and zinc (Zn) in a freshwater bivalve. Zebra mussels were transplanted to three sites along the Seine River (France) and collected monthly for 11 months. Measurements of the metal body burdens in mussels were compared with the predictions from the biodynamic model. The exchangeable fraction of metal particles did not account for the bioavailability of particulate metals, since it did not capture the differences between sites. The assimilation efficiency (AE) parameter is necessary to take into account biotic factors influencing particulate metal bioavailability. The biodynamic model, applied with AEs...
Tipo: Text
Palavras-chave: Bioaccumulation; Active biomonitoring; Bioavailability of particulate metals; Assimilation efficiency; Chemical sequential extraction.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00051/16218/14040.pdf