Lauriane LedieuLaboratoire Eau et Environnement de Nantes · GERS
Lauriane Ledieu
Post-doc
About
17
Publications
1,186
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63
Citations
Introduction
Graduated with a PhD in environmental geochemistry in 2020, my research topics focus on the geochemical cycles of contaminants (trace metals, PAHs, pharmaceuticals, plastics) in hydrosytems (dissolved and particulate phases), from their sources to their accumulation zones.
Additional affiliations
September 2021 - present
Laboratoire eau et environnement
Position
- PostDoc Position
Description
- My researches focus on plastic macrolitter inputs from urban contexts as well as their dynamic and fluxes in the receiving hydrosystems.
October 2017 - November 2020
Position
- PhD Student
Description
- The study focused on the particulate transport at a periurban catchment scale through multi-elemental geochemistry. This understanding was based on element from natural and anthropogenic sources (trace metals, pharmaceuticals) quantifications in the particulate phase of a periurban stream, at the catchment scale and during three years. This quantification was coupled with a monitoring of the stream hydro-sedimentary dynamic.
Education
October 2017 - November 2020
Publications
Publications (17)
Urban areas concentrate on human activities that generate large amounts of waste. A small fraction is mismanaged and ends up on urban surfaces and eventually in waterways. The fraction reaching waterways is usually estimated using poorly constrained data, while litter density on urban surfaces and its subsequent transfer dynamics are also poorly do...
Les environnements terrestres ont récemment été désignés comme la source principale de la pollution plastique liée aux milieux aquatiques (rivières, océans, etc.), mais peu d'études étayent cette hypothèse. La problématique des déchets abandonnés sur les surfaces urbaines et transférés via les réseaux pluviaux est pourtant une problématique de long...
Urban areas constitute a major hotspot of litter, including plastic litter, that stormwater can wash off towards waterways. However, few studies quantified and characterized litter densities in urban areas and fluxes transported by stormwater networks. Moreover, little information is available on litter transport dynamics in stormwater, and on the...
La quantification des flux de macroplastiques transférés par les fleuves fait l’objet de plus en plus d’études scientifiques, mais une meilleure appréciation de ces flux nécessite une compréhension fine de la dynamique de transfert de ces déchets en milieu estuarien, interface entre le milieu continental et le milieu océanique. À l’image de ce qui...
Municipal landfills receive a high amount of plastic waste and due to the occurring physical and biochemical degradation processes, could be significant sources of microplastics (MP). Evaluating the threat to groundwater through the transfer of MP via landfill leachates require more research. The former “Prairie de Mauves” landfill, operated from 1...
The quantification of macroplastic fluxes transferred by rivers toward the pelagic environment requires a better understanding of macrodebris transfer processes in estuarine environments. Following the strategy adopted in the Seine estuary, this study aims to characterize macroplastic trajectories in the Loire estuary. Between January 2020 and July...
Land-based sources of riverine macrolitter are now recognized as a major concern, but few field data on litter amount, composition and sources are available. This is especially the case for macrolitter hotspots like high frequented roadways that could generate large amount of macrolitter potentially reaching rivers. This dataset provides macrolitte...
Many researches mention the need to identify the land-based sources of riverine macrolitter but few field data on litter amount, composition and sources are available in the scientific literature. Describing macrolitter hotspot dynamics would actually allow a better estimation of fluxes in the receiving environments and a better identification of t...
La quantification des flux de macroplastiques transférés par les fleuves fait l'objet de plus en plus d'études scientifiques mais une meilleure appréciation de ces flux nécessite une compréhension fine de la dynamique de transfert de ces déchets en milieu estuarien, interface entre le milieu continental et le milieu océanique. A l'image de ce qui a...
Pharmaceutical products (PPs) are consumed worldwide and are continuously released into hydrological environments, but are not efficiently removed by sewage treatment plants. Their occurrence within the dissolved phase has been extensively studied, but only a few articles concern solid matrices. The mechanisms and extent of sorption depend on the p...
Le ruissellement est un phénomène épisodique et localisé, donc difficile à mesurer. Il résulte de l'interaction de nombreux facteurs, dont les caractéristiques intrinsèques et de surface du sol, la morphologie du bassin versant, mais également les caractéristiques pluviométriques. Afin d'améliorer la compréhension de la genèse et de la propagation...
Déterminer et quantifier le rôle de la phase particulaire dans les grands cycles géochimiques et le transport des contaminants, est devenu indispensable pour établir des bilans de masse précis et discuter de l’incidence du facteur de forçage d’origine anthropique sur les écosystèmes. Durant ces travaux, le transport particulaire a été étudié à l’éc...
The transfer and storage of chemical elements in particulate matter are controlled by physical, chemical and biological processes. Their dynamics are well understood, especially in environments that show strong tectonic and/or geomorphic pressures, and are frequently reconstructed over centuries or decades to evaluate climate change effects for exa...
