21 research outputs found
M2 « OSPAR » in a maximum visual accumulation of plastic debris in the Seine estuary National Nature Reserve
MICRO 2020, Fate and Impact of Microplastics : Knowledge and Responsabilities, Lanzarote, ESPAGNE, 23-/11/2020 - 27/11/202
Plastic debris dataset on the Seine river banks: Plastic pellets, unidentified plastic fragments and plastic sticks are the Top 3 items in a historical accumulation of plastics
Plastic pollution in oceans and rivers is of high concern because of its persistence in the environment and its potential impact on ecosystems. However, there is a specific lack of data in rivers. Here we present data from the Seine river banks in a historical polluted shore. Data were classified using international MSFD and OSPAR classifications. The sampled site is a quadrat of 1 m2 located downstream in the estuary in a visual maximum along a 1 km shore covered by plastics. A total of 20,259 plastic debris were individually counted, classified and weighted by category for a total mass higher than 4 kg. Half of the plastic debris in number are represented by preproduction pellets
Pressure impact of autoclave treatment on water sorption and pectin composition of flax cellulosic-fibres
International audienc
Accumulation des déchets sauvages dans les écosystèmes aquatiques : état des lieux et enjeux
International audienc
Enhanced removal of Cr(VI) by polymer inclusion membrane based on poly(vinylidene fluoride) and Aliquat 336
Symetrisation of asymetrical short-circuits in IGBT drives
info:eu-repo/semantics/publishe
Evolution of mechanical and barrier properties of thermally aged polycarbonate films
International audienc
Endless journey of macroplastics in rivers: From hours to decades tracking in the Seine River
EGU General Assembly 2021, ONLINE, , 19-/04/2021 - 30/04/2021Rivers are major pathways of plastics from lands into the Ocean. However, there is still a huge lack of knowledge on how riverine litter, including macroplastics, is transferred into the Ocean. Quantitative measurements of macroplastic emissions in rivers even suggest that a small fraction (0.001 to 3%) of the Mismanaged Plastic Waste (MPW) generated within a river basin finally reach the sea. Instead, macroplastics may remain within the catchment and on coastlines because of complex transport dynamics that delay the transfer of plastic debris. In order to better understand those dynamics, we performed tracking of riverine litter over time. First, hundreds of date-prints items were collected on riverbanks in the Seine estuary. The distribution of their Use-By-Dates suggest that riverine litter may remain stored on riverbanks for decades. Second, we performed real time tracking of floating and sub-floating bottles using GPS-trackers. Between March 2018 and April 2019, 39 trajectories were recorded in the estuary under tidal influence and 11 trajectories upriver, covering a wide range of hydrometeorological conditions. Results show a succession of stranding/remobilization episodes in combination with alternating upstream and downstream transport in the estuary related to tides. In the end, tracked bottles systematically stranded somewhere, for hours to weeks, from one to several times on different sites. The overall picture shows that different hydrometeorological phenomena interact with various time scales ranging from hours/days (high/low tides) to weeks/months (spring/neap tides and highest tides) and years (seasonal river flow, vegetation and geomorphological aspects). Thus, the fate of plastic debris is highly unpredictable with a chaotic-like transfer of plastic debris into the Ocean. The residence time of these debris is much longer than the transit time of water. This offers the opportunity to collect them before they get fragmented and/or reach the Sea
Endless journey of macroplastics in rivers
MICRO 2020, Fate and Impact of Microplastics : Knowledge and Responsabilities, Lanzarote, ESPAGNE, 23-/11/2020 - 27/11/2020Rivers are supposed to be the main pathways of plastics from lands into the Ocean (Lebreton et al., 2017; Schmidt et al., 2017). However, there is still a huge lack of knowledge on how riverine litter, including macroplastics, is transferred into the Ocean. Quantitative measurements of macroplastic emissions in rivers even suggest that a small fraction (0.001 to 3%) of the Mismanaged Plastic Waste (MPW) generated within a river basin finally reach the sea (Emmerik et al., 2019; Schöneich-Argent et al., 2020; Tramoy et al. submitted). Instead, macroplastics may remain within the catchment and on coastlines because of complex transport dynamics that delay the transfer of MPW from lands into the Ocean (Olivelli et al., 2020; Weideman et al., 2020). In order to better understand those dynamics, we released 1L plastic bottles equipped with GPS-trackers in the Seine River. Between March 2018 and April 2019, 39 trajectories were recorded in the estuary under tidal influence and 11 trajectories upriver, covering a wide range of hydrometeorological conditions. Results show a succession of stranding/remobilization episodes in combination with alternating upstream and downstream transport in the estuary related to tides. In the end, 100% of the tracked bottles stranded somewhere, for hours to weeks, from one to several times at different sites. In addition, date-prints items found in historical polluted sites in the estuary confirm that plastic may remain stored on riverbanks for decades. The overall picture shows that different physical phenomena interact with various time scales ranging from hours/days (high/low tides) to weeks/months (spring/neap tides and highest tides) and years (seasonal river flow). Thus, the fate of MPW is highly unpredictable with a chaotic-like transfer of plastic debris into the Ocean, and their residence time is much longer than the transit time of water