Experimental Study on the Erodability of Microplastics in Muddy Environments
| dc.rights.license | open | en_US |
| hal.structure.identifier | Environnements et Paléoenvironnements OCéaniques [EPOC] | |
| dc.contributor.author | JALON ROJAS, Isabel
ORCID: 0000-0003-4254-4084 IDREF: 160580730 | |
| hal.structure.identifier | Environnements et Paléoenvironnements OCéaniques [EPOC] | |
| dc.contributor.author | LEMAIRE-COQUEUGNIOT, Adeline | |
| hal.structure.identifier | Hydrodynamique et écoulements environnementaux [Institut Pprime] [HydEE] | |
| dc.contributor.author | GOMIT, Guillaume | |
| hal.structure.identifier | Environnements et Paléoenvironnements OCéaniques [EPOC] | |
| dc.contributor.author | ROMERO RAMIREZ, Alicia | |
| dc.contributor.author | JARNY, Sébastien | |
| dc.date.accessioned | 2025-04-09T09:08:39Z | |
| dc.date.available | 2025-04-09T09:08:39Z | |
| dc.date.issued | 2024-03-11 | |
| dc.date.conference | 2024-04-14 | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/206061 | |
| dc.description.abstractEn | This 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.sponsorship | Processus physiques de transport de microplastiques en estuaires macrotidaux - ANR-22-CE01-0011 | en_US |
| dc.language.iso | EN | en_US |
| dc.title.en | Experimental Study on the Erodability of Microplastics in Muddy Environments | |
| dc.type | Communication dans un congrès | en_US |
| dc.identifier.doi | 10.5194/egusphere-egu24-20316 | en_US |
| dc.subject.hal | Sciences de l'environnement | en_US |
| bordeaux.hal.laboratories | EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805 | en_US |
| bordeaux.institution | Université de Bordeaux | en_US |
| bordeaux.institution | CNRS | en_US |
| bordeaux.conference.title | EGU General Assembly 2024 | en_US |
| bordeaux.team | METHYS | en_US |
| bordeaux.conference.city | Vienna | en_US |
| bordeaux.import.source | hal | |
| hal.identifier | hal-04691418 | |
| hal.version | 1 | |
| hal.invited | non | en_US |
| hal.proceedings | non | en_US |
| hal.conference.end | 2024-09-19 | |
| hal.popular | non | en_US |
| hal.audience | Internationale | en_US |
| hal.export | false | |
| workflow.import.source | hal | |
| dc.rights.cc | Pas de Licence CC | en_US |
| bordeaux.COinS | ctx_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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