Microplastics in the abyss: a first investigation into sediments at 2443-m depth (Toulon, France)

Cutroneo, Laura; Capello, Marco; Domi, Alba; Consani, Sirio; Lamare, P.; Coyle, P.; Bertín, V.; Dornic, D.; Reboa, Anna; Geneselli, Irene; Anghinolfi, M.

doi:10.1007/s11356-021-17997-z

Cited by 14 publications

(3 citation statements)

References 64 publications

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“…The number of studies on meso-and macroplastics is significantly lower than the number of studies on microplastics in the marine environment. In the studies used here from 2021 onward, it is evident that there is a research gap concerning these sizes, with 22 studies on microplastics [1,4,7,8,10,11,[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] and 5 studies that include meso-and macroplastics [5,12,13,35,36]. Therefore, this study not only focuses on microplastics but also considers meso-and macroplastics, capturing particles ranging in size from 1 mm to 1000 mm.…”

Section: Introductionmentioning

confidence: 99%

The Côte d’Argent, France: Quantification of Plastic Pollution in Beach Sediments

Bornstein,

Steinhaus

2024

Sustainability

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Pollution with anthropogenic waste, particularly persistent plastic, has now reached every remote corner of the world. The French Atlantic coast, given its extensive coastline, is particularly affected. To gain an overview of current plastic pollution, this study examined a stretch of 250 km along the Silver Coast of France. Sampling was conducted at a total of 14 beach sections, each with five sampling sites in a transect. At each collection site, a square of 0.25 m2 was marked. The top 5 cm of beach sediment was collected and sieved on-site using an analysis sieve (mesh size 1 mm), resulting in a total of approximately 0.8 m3 of sediment, corresponding to a total weight of 1300 kg of examined beach sediment. A total of 1972 plastic particles were extracted and analysed using infrared spectroscopy, corresponding to 1.5 particles kg−1 of beach sediment. Pellets (885 particles), polyethylene as the polymer type (1349 particles), and particles in the size range of microplastics (943 particles) were most frequently found. The significant pollution by pellets suggests that the spread of plastic waste is not primarily attributable to tourism (in February/March 2023). The substantial accumulation of meso- and macro-waste (with 863 and 166 particles) also indicates that research focusing on microplastics should be expanded to include these size categories, as microplastics can develop from them over time.

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Section: Introductionmentioning

confidence: 99%

The Côte d’Argent, France: Quantification of Plastic Pollution in Beach Sediments

Bornstein,

Steinhaus

2024

Sustainability

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“…sea birds 4 . This pollution was first documented in aquatic marine environments [5][6][7][8] , but is now found in marine sediments 9,10 , freshwater environments [11][12][13] , and also in terrestrial ones 14,15 .…”

Section: Introductionmentioning

confidence: 99%

Biobased, Biodegradable but not bio-neutral: about the effects of polylactic acid nanoparticles on macrophages

Collin-Faure,

Vitipon,

Diemer

et al. 2024

Preprint

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Plastics are persistent pollutants, because of their slow degradation, which suggests that they may lead to cumulative and/or delayed adverse effects due to their progressive accumulation over time. Macroplastics produced by human activity are released in the environment, where they degrade into micro and nanoplastics that are very easily uptaken by a wide variety of organisms, including humans. Microplastics and nanoplastics being particulates, they are handled in the body by specialized cells such as macrophages (or their evolutionary counterparts), where they can elicit a variety of responses. One solution to alleviate the problems due to biopersistence, such as accumulation over life, would be to use biodegradable plastics. One of the emerging biodegradable plastics being polylactide, we decided to test the responses of macrophages to polylactide nanoparticles, using a combination of untargeted proteomics and targeted validation experiments. Proteomics showed important adaptive changes in the proteome in response to exposure to polylactide nanoparticles. These changes affected for example mitochondrial, cytoskeletal and lysosomal proteins, but also proteins implicated in immune functions or redox homeostasis. Validation experiments showed that many of these changes were homeostatic, with no induced oxidative stress and no gross perturbation of the mitochondrial function. However, polylactide particles altered the immune functions such as phagocytosis (−20%) or cytokine production (2-fold increase for TNF production), which may translate into a decreased ability to macrophages to respond to bacterial infections. Furthermore, polylactide particles also induced moderate cross-toxicity with some quinones such as phenanthrene quinone, a combustion by-product that is a suspected carcinogen.

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“…2 While the accumulation of plastics in seas has been long documented and is still under active study, [3][4][5][6] they are also widely present in freshwaters, including rivers. [7][8][9] Their accumulation in soils is less documented, but results obtained on marine sediments 10,11 do not bring optimism, especially for environments such as landfills or floodplains. 12,13 Upon environmental degradation, the plastic wastes degrade into smaller particles, first microplastics (in the millimeter range) and then nanoplastics (micrometer and sub-micrometer range).…”

Section: Introductionmentioning

confidence: 99%

Does size matter? A proteomics-informed comparison of the effects of polystyrene beads of different sizes on macrophages

Collin-Faure

Dalzon

Devcic

et al. 2022

Environ. Sci.: Nano

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Microplastics in the abyss: a first investigation into sediments at 2443-m depth (Toulon, France)

Cited by 14 publications

References 64 publications

The Côte d’Argent, France: Quantification of Plastic Pollution in Beach Sediments

The Côte d’Argent, France: Quantification of Plastic Pollution in Beach Sediments

Biobased, Biodegradable but not bio-neutral: about the effects of polylactic acid nanoparticles on macrophages

Does size matter? A proteomics-informed comparison of the effects of polystyrene beads of different sizes on macrophages

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