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Comportement biogéochimique d'antimoine (Sb) et de tellure (Te) dans le milieu côtier : vers des scénarios de dispersion des radionucléides de Sb et de Te en cas de rejets accidentels de centrales nucléaires ArchiMer
Gil-diaz, Teba.
Antimony (Sb) and tellurium (Te) are relatively uncommon contaminants (stable isotopes) and may form short-lived fission products (radionuclides) released into the environment during nuclear power plants accidents. Little is known about their respective biogeochemical behaviours, necessary for general contamination studies and post-accidental radiological risk assessment.This work provides original knowledge on Sb and Te biogeochemical behaviour in highly dynamic continent-ocean transition systems: the Gironde Estuary and the Rhône River. Concentrations, spatial/temporal variations, solid/liquid partitioning (Kd), and fluxes are studied from long-term records at the watershed scale. Four estuarine sampling campaigns during contrasting hydrological...
Tipo: Text Palavras-chave: Antimoine; Tellure; Estuaire de la Gironde; Partition solide/liquide (Kd); Extractions sélectives; Antimony; Tellurium; Gironde Estuary; Solid/liquid partitioning (Kd); Selective extractions.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00607/71891/70592.pdf
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Platinum in sediments and mussels from the northwestern Mediterranean coast: temporal and spatial aspects ArchiMer
Abdou, Melina; Schafer, Jorg; Hu, Ruoyu; Gil-diaz, Teba; Garnier, Cedric; Brach-papa, Christophe; Chiffoleau, Jean-francois; Charmasson, Sabine; Giner, Franck; Dutruch, Lionel; Blanc, Gerard.
Platinum (Pt) is considered a Technology Critical Element (TCE) and an emerging metallic contaminant with increasing release into the environment. Gaps in knowledge and understanding of environmental levels, fate and effects of Pt still exist, especially in the marine environment. This work presents Pt concentrations in the northwestern Mediterranean coast including: (i) temporal variability from sediment cores and farmed mussels in the Toulon Bay (historically affected by intense human activities) and (ii) spatial distribution from recent wild mussels collected along ∼ 300 km coastline with contrasting ecosystems (including natural reserves), quantified using voltammetry and inductively coupled plasma-mass spectrometry. The historical (> 100 years)...
Tipo: Text Palavras-chave: Platinum; Sediments; Mussels; Biomonitoring; Mediterranean coast.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00460/57134/59055.pdf
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