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Experimental Study on the Erodability of Microplastics in Muddy Environments

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorJALON ROJAS, Isabel
ORCID: 0000-0003-4254-4084
IDREF: 160580730
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorLEMAIRE-COQUEUGNIOT, Adeline
hal.structure.identifierHydrodynamique et écoulements environnementaux [Institut Pprime] [HydEE]
dc.contributor.authorGOMIT, Guillaume
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorROMERO RAMIREZ, Alicia
dc.contributor.authorJARNY, Sébastien
dc.date.accessioned2025-04-09T09:08:39Z
dc.date.available2025-04-09T09:08:39Z
dc.date.issued2024-03-11
dc.date.conference2024-04-14
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/206061
dc.description.abstractEnThis study aims to elucidate the erodability behavior of microplastics in muddy environments like lakes, rivers, estuaries, and deltas, quantifying their critical shear stress on muddy sediment beds. Microplastics of diverse compositions, densities, shapes, and sizes were tested in a hydraulic flume with smooth and synthetic cohesive sediment beds. As flow intensity gradually increased, leading to particle mobilization, friction velocities and critical shear stresses were calculated. Initial results on smooth beds reveal that particle shape was a dominant factor in mobilization (sphere > pellet > fiber > sheet), followed by density: for equivalent shapes, denser particles required higher friction velocities for mobilization. Results from tests with different particle sizes and orientations relative to the flow highlight the influence of the exposed surface area: larger surface areas facilitate easier particle mobilization. Comparative experiments on smooth and muddy surfaces revealed higher shear stresses on cohesive sediment beds, attributed to particles sinking. Particle Image Velocimetry (P.I.V.) analysis showcased roughness-induced turbulence, marked by acceleration peaks and depressions, as the primary mechanism facilitating particle detachment from sediment.
dc.description.sponsorshipProcessus physiques de transport de microplastiques en estuaires macrotidaux - ANR-22-CE01-0011en_US
dc.language.isoENen_US
dc.title.enExperimental Study on the Erodability of Microplastics in Muddy Environments
dc.typeCommunication dans un congrèsen_US
dc.identifier.doi10.5194/egusphere-egu24-20316en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.conference.titleEGU General Assembly 2024en_US
bordeaux.teamMETHYSen_US
bordeaux.conference.cityViennaen_US
bordeaux.import.sourcehal
hal.identifierhal-04691418
hal.version1
hal.invitednonen_US
hal.proceedingsnonen_US
hal.conference.end2024-09-19
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.date=2024-03-11&rft.au=JALON%20ROJAS,%20Isabel&LEMAIRE-COQUEUGNIOT,%20Adeline&GOMIT,%20Guillaume&ROMERO%20RAMIREZ,%20Alicia&JARNY,%20S%C3%A9bastien&rft.genre=unknown


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