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dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorZILBER, Louise
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorPARLANTI, Edith
dc.contributor.authorFORTIN, Claude
dc.date.accessioned2024-03-08T13:23:58Z
dc.date.available2024-03-08T13:23:58Z
dc.date.issued2024-02-16
dc.identifier.urioai:crossref.org:10.3389/fenvc.2024.1342500
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/188650
dc.description.abstractEnNatural dissolved organic matter (DOM) is a heterogeneous mixture of a variety of organic compounds, with a great importance for the environmental fate of metals and their ecotoxicity. However, its complex nature and variable composition make the understanding of its role a challenge. Lanthanum (La) has a strong affinity for DOM and is one of the rare earth elements that is widely used in many electronic and green technologies, and for which the demand may potentially increase for the foreseeable future. The present study examines the links between the optical and chemical properties of organic matter and its influence on the bioavailability and toxicity of La toward the green microalga Chlorella fusca. A total of four DOMs, two natural organic matter samples from Ontario (Luther Marsh and Bannister Lake) and two Suwannee River fulvic and humic acids, were characterized by absorbance and fluorescence spectroscopy as well as by asymmetrical flow field-flow fractionation. These suggest that Luther Marsh and the Suwannee River humic acid have higher molecular weight and are more aromatic, compared to the other two DOMs. The concentrations of free metal ion La3+ were measured by an ion exchange technique and a partial ultrafiltration method, and related to biological response. Toxicity tests over 96 h at pH = 5.0 were separately conducted with and without 3 mg C·L−1 of each DOM. All DOM samples reduced La bioavailability but as opposed to what can be expected based on the Biotic Ligand Model, the presence of DOM exacerbated the toxicity of La and its accumulation in algal cells when only the free La3+ ion concentration was considered. These results indicate that the role of natural organic matter in modulating metal bioavailability remains to be deciphered.
dc.language.isoENen_US
dc.rightsAttribution 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/us/*
dc.sourcecrossref
dc.subject.enChlorella fusca
dc.subject.enmetal speciation
dc.subject.enbiotic ligand model
dc.subject.enabsorbance
dc.subject.enfluorescence
dc.subject.enDOM quality
dc.subject.enrare earth element
dc.titleImpact de la matière organique de différentes origines sur la spéciation, la biodisponibilité et la toxicité du lanthane pour une algue verte
dc.title.enImpact of organic matter of different origins on lanthanum speciation, bioavailability and toxicity toward a green alga
dc.typeArticle de revueen_US
dc.identifier.doi10.3389/fenvc.2024.1342500en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalFrontiers in Environmental Chemistryen_US
bordeaux.volume5en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamLPTCen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcedissemin
hal.identifierhal-04495801
hal.version1
hal.date.transferred2024-03-08T13:24:00Z
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exporttrue
workflow.import.sourcedissemin
dc.rights.ccCC BYen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.title=Impact%20de%20la%20mati%C3%A8re%20organique%20de%20diff%C3%A9rentes%20origines%20sur%20la%20sp%C3%A9ciation,%20la%20biodisponibilit%C3%A9%20et%20la%20toxicit%C3%A9%20du%2&rft.atitle=Impact%20de%20la%20mati%C3%A8re%20organique%20de%20diff%C3%A9rentes%20origines%20sur%20la%20sp%C3%A9ciation,%20la%20biodisponibilit%C3%A9%20et%20la%20toxicit%C3%A9%20du%&rft.jtitle=Frontiers%20in%20Environmental%20Chemistry&rft.date=2024-02-16&rft.volume=5&rft.au=ZILBER,%20Louise&PARLANTI,%20Edith&FORTIN,%20Claude&rft.genre=article


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