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Tellurium behaviour in a major European fluvial–estuarine system (Gironde, France): fluxes, solid/liquid partitioning and bioaccumulation in wild oysters

dc.rights.licenseopenen_US
dc.contributor.authorGIL-DÍAZ, Teba
dc.contributor.authorSCHÄFER, Jörg
dc.contributor.authorDUTRUCH, Lionel
dc.contributor.authorBOSSY, Cécile
dc.contributor.authorPOUGNET, Frédérique
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorABDOU, Melina
dc.contributor.authorLERAT-HARDY, Antoine
dc.contributor.authorPERETO, Clément
dc.contributor.authorDERRIENNIC, Hervé
dc.contributor.authorBRIANT, Nicolas
dc.contributor.authorSIREAU, Teddy
dc.contributor.authorKNOERY, Joël
dc.contributor.authorBLANC, Gérard
dc.date.accessioned2024-02-29T10:10:32Z
dc.date.available2024-02-29T10:10:32Z
dc.date.issued2019
dc.identifier.issn1448-2517en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/188503
dc.description.abstractEnThe environmental behaviour of tellurium is poorly understood. We investigate the transport of tellurium in both dissolved and particulate forms from the river watershed to the Gironde Estuary, where a 30-year historical record provides insight on tellurium bioaccumulation in wild oysters. These results constitute the first comprehensive study on natural tellurium behaviour in a major fluvial-estuarine system, information essential for predictive modelling of tellurium risk assessment. AbstractTellurium (Te) is a technology critical element (TCE) with largely unknown environmental behaviour, especially in continent-ocean interface systems. The unknown behaviour results from the lack of studies in aquatic environments and from analytical challenges limiting the determination of its naturally low (ultra-trace) environmental levels. We performed a comprehensive study of Te in the Lot–Garonne–Gironde fluvial–estuarine system to better understand seasonal variations, solid/liquid partitioning (Kd), gross fluxes, estuarine dynamics, and transfer to wild oysters at the estuary mouth. A temporal record (2014–2017) of dissolved (Ted) and particulate (Tep) Te concentrations at five sites in the Lot–Garonne River system shows little differences between sites, with average ~0.9ngL−1 and ~50µgkg−1 respective concentrations. Watershed Ted and Tep follow parallel seasonal patterns, which result in constant partitioning (log10 Kd ~4.75Lkg−1), with constant annual gross dissolved fluxes (~15.0kgy−1) and variable gross particulate fluxes (from 6.50 to 140kgy−1) entering the Gironde Estuary. Estuarine reactivity in contrasting hydrological conditions (from flood to drought) suggest that grain-size effects and/or estuarine hydrological residence times strongly affect Tep behaviour. Historical records (1984–2017) of Te in wild oysters at the estuary mouth vary from 1.33 to 2.89µgkg−1 dry weight (d.w.), without any clear long-term trend. This study provides rare knowledge on Te environmental dynamics in aquatic systems, and suggests that, although no current anthropogenic sources were identified in the economically developed Lot-Garonne-Gironde fluvial-estuarine system, there is a non-negligible bioaccumulation in wild oysters at the estuary mouth.
dc.description.sponsorshipAMORAD1en_US
dc.description.sponsorshipPour une gestion intégrée et durable des ressources en eau de bassins soumis à des pollutions industrielles et urbaines: étude comparative du Lot (France) et du Danshuei (Taiwan) - ANR-11-IS56-0003en_US
dc.language.isoENen_US
dc.title.enTellurium behaviour in a major European fluvial–estuarine system (Gironde, France): fluxes, solid/liquid partitioning and bioaccumulation in wild oysters
dc.typeArticle de revueen_US
dc.identifier.doi10.1071/EN18226en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalEnvironmental Chemistryen_US
bordeaux.page229en_US
bordeaux.volume16en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue4en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamTGMen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-03767233
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Environmental%20Chemistry&rft.date=2019&rft.volume=16&rft.issue=4&rft.spage=229&rft.epage=229&rft.eissn=1448-2517&rft.issn=1448-2517&rft.au=GIL-D%C3%8DAZ,%20Teba&SCH%C3%84FER,%20J%C3%B6rg&DUTRUCH,%20Lionel&BOSSY,%20C%C3%A9cile&POUGNET,%20Fr%C3%A9d%C3%A9rique&rft.genre=article


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