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A semi-automated Raman micro-spectroscopy method for morphological and chemical characterizations of microplastic litter ArchiMer
Frere, L.; Paul-pont, I.; Moreau, Julien; Soudant, P.; Lambert, C.; Huvet, Arnaud; Rinnert, Emmanuel.
Every step of microplastic analysis (collection, extraction and characterization) is time-consuming, representing an obstacle to the implementation of large scale monitoring. This study proposes a semi-automated Raman micro-spectroscopy method coupled to static image analysis that allows the screening of a large quantity of microplastic in a time-effective way with minimal machine operator intervention. The method was validated using 103 particles collected at the sea surface spiked with 7 standard plastics: morphological and chemical characterization of particles was performed in < 3 h. The method was then applied to a larger environmental sample (n = 962 particles). The identification rate was 75% and significantly decreased as a function of particle...
Tipo: Text Palavras-chave: Microplastics; Raman micro-spectroscopy; Surface seawater; Morphology; Environmental monitoring; Automating.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00357/46802/46976.pdf
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Analyse, distribution, production et dégradation d’esters de phtalates (PAEs) en zone côtière méditerranéenne ArchiMer
Paluselli, Andrea.
Phthalic Acid Esters (PAEs) are a group of emerging organic contaminants that have become a serious issue because of their ubiquitous presence on the marine environment worldwide and for the endocrine disrupting effects in animals and humans. However, little is known about their distribution in the Ocean, mainly because of analytical difficulties and the high possibility of ambient sample contamination. Plastic debris in marine environment includes resin pellets, macro- and microplastic fragments, and contains additives such as PAEs that might be released in the aquatic environment in unknown proportion. In our work, we improved an analytical method for the determination of 8 PAEs, at trace levels in marine and fresh waters. In the first part of the...
Tipo: Text Palavras-chave: Phtalates; DEHP; Eau de mer; Perturbateurs endocriniens; Microplastiques; Microplastics; Endocrine disruptors; Seawater; Phthalates; Dehp.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00497/60904/64252.pdf
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Are litter, plastic and microplastic quantities increasing in the ocean? ArchiMer
Galgani, Francois; Brien, Aleke Stoefen-o; Weis, Judith; Ioakeimidis, Christos; Schuyler, Qamar; Makarenko, Iryna; Griffiths, Huw; Bondareff, Joan; Vethaak, Dick; Deidun, Alan; Sobral, Paula; Topouzelis, Konstantinos; Vlahos, Penny; Lana, Fernanda; Hassellov, Martin; Gerigny, Olivia; Arsonina, Bera; Ambulkar, Archis; Azzaro, Maurizio; Bebianno, Maria João.
Whilst both plastic production and inputs at sea have increased since the 1950s, several modelling studies predict a further increase in the coming years in these respective quantities. We compiled scientific literature on trends in marine litter, consisting largely of plastic and microplastics in the ocean, understanding that monitoring programs or assessments for these aspects are varied, frequently focusing on limited components of the marine environment in different locations, and covering a wide spectrum of marine litter types, with limited standardization. Here we discuss how trends in the amounts of litter in the marine environment can be compared with the information provided by models. Increasing amounts of plastic are found in some regions,...
Tipo: Text Palavras-chave: Plastic pollution; Marine litter; Microplastics; Trends; Monitoring.
Ano: 2021 URL: https://archimer.ifremer.fr/doc/00677/78927/81297.pdf
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Automating the characterisation of beach microplastics through the application of image analyses ArchiMer
Gauci, Adam; Deidun, Alan; Montebello, John; Abela, John; Galgani, Francois.
Four sandy beaches on the island of Malta in the Central Mediterranean were regularly sampled for Large MicroPlastic (LMP) particles having a diameter between 1 mm and 5 mm, at stations located at the waterline and 10 m inshore. The 10975 extracted LMP particles were characterised (dimensions, surface roughness, colour) through unaided visual observation, microscopic analyses, and an algorithm developed within the current study. Two-thirds of the isolated particles were smooth and the majority of these belonged to the grey-white colour category, with a low degree of opaqueness and discolouration, and a high degree of transparency, suggesting that these were dominated by low-density polyethylene LMPs. Conflicting evidence concerning the relative residence...
Tipo: Text Palavras-chave: Image processing; Microplastics; Parameterisation; Monitoring obligations; Marine litter.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00513/62471/69557.pdf
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Constraints and Priorities for Conducting Experimental Exposures of Marine Organisms to Microplastics ArchiMer
Paul-pont, Ika; Tallec, Kevin; Gonzalez-fernandez, Carmen; Lambert, Christophe; Vincent, Dorothee; Mazurais, David; Zambonino-infante, Jose-luis; Brotons, Guillaume; Lagarde, Fabienne; Fabioux, Caroline; Soudant, Philippe; Huvet, Arnaud.
Marine plastic pollution is a major environmental issue. Given their ubiquitous nature and small dimensions, ingestion of microplastic (MP) and nanoplastic (NP) particles and their subsequent impact on marine life are a growing concern worldwide. Transfers along the trophic chain, including possible translocation, for which the hazards are less understood, are also a major preoccupation. Effects of MP ingestion have been studied on animals through laboratory exposure, showing impacts on feeding activity, reserve depletion and inflammatory responses, with consequences for fitness, notably reproduction. However, most experimental studies have used doses of manufactured virgin microspheres that may not be environmentally realistic. As for most...
Tipo: Text Palavras-chave: Microplastics; Nanoplastics; Experimental exposure; Impacts; Marine organisms; Physiology.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00449/56088/57621.pdf
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Distribution des microplastiques dans les eaux de sub-surfaces, en Méditerranéenne nord-occidentale ArchiMer
Martinot, Pauline.
Between April and November 2018, 20 microplastic (MPs) samples were collected at 8 sampling stations in French Mediterranean coast from Port-Cros to Banyuls as well as upstream the Rhône River. MPs were found in every sample with variable concentrations, size range and colors. Concentrations ranged from 11 items (Port-Cros) to 15 178 items (Port-Saint-Louis low salinity, PS). The samples with the highest MPs count originate from PS and the Bay of Marseille. MPs count in Spring and Autumn results in 217 (± 12,3) and 351 (± 4,3) respectively for the Bay and particles >1 000 μm dominated sampling stations during both seasons, while PS samples showed greater variability in size distribution. The site PS, near the Rhône River, has the most fiber and the...
Tipo: Text Palavras-chave: Débris marins; Microplastiques; Mer Méditerrannée; Golfe du Lion; Fleuve du Rhône.; Marine litter; Microplastics; Mediterranean Sea; Gulf of Lion; Rhône River.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00632/74419/74137.pdf
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Editorial: Impacts of Marine Litter ArchiMer
Galgani, Luisa; Beiras, Ricardo; Galgani, Francois; Panti, Cristina; Borja, Angel.
Tipo: Text Palavras-chave: Plastics; Nanoplastics; Microplastics; Environmental regulation; Ecotoxicology; Aquatic biota.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00491/60231/63602.pdf
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Editorial: Plastic Pollution ArchiMer
Galgani, Francois; Pham, Christopher Kim; Reisser, Julia.
Tipo: Text Palavras-chave: Plastic; Pollution; Models; Microplastics; Degradation.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00400/51138/51910.pdf
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Exposure of marine mussels Mytilus spp. to polystyrene microplastics: Toxicity and influence on fluoranthene bioaccumulation ArchiMer
Paul-pont, Ika; Lacroix, Camille; Gonzalez Fernandez, Carmen; Hegaret, Helene; Lambert, Christophe; Le Goic, Nelly; Frere, Laura; Cassone, Anne-laure; Sussarellu, Rossana; Fabioux, Caroline; Guyomarch, Julien; Albentosa, Marina; Huvet, Arnaud; Soudant, Philippe.
The effects of polystyrene microbeads (micro-PS; mix of 2 and 6 μm; final concentration: 32 μg L−1) alone or in combination with fluoranthene (30 μg L−1) on marine mussels Mytilus spp. were investigated after 7 days of exposure and 7 days of depuration under controlled laboratory conditions. Overall, fluoranthene was mostly associated to algae Chaetoceros muelleri (partition coefficient Log Kp = 4.8) used as a food source for mussels during the experiment. When micro-PS were added in the system, a fraction of FLU transferred from the algae to the microbeads as suggested by the higher partition coefficient of micro-PS (Log Kp = 6.6), which confirmed a high affinity of fluoranthene for polystyrene microparticles. However, this did not lead to a modification...
Tipo: Text Palavras-chave: Microplastics; Fluoranthene; Mussel; Depuration; Oxidative system.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00344/45502/45848.pdf
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First observation on neustonic plastics in waters off NW Spain (spring 2013 and 2014) ArchiMer
Gago, Jesus; Henry, Maryvonne; Galgani, Francois.
This paper examines the presence and distribution of plastic particles in waters off the NW Spanish Atlantic coast. A pilot sampling program was initiated in 2013 to study the presence of plastic particles in surface waters. A total of 41 neuston samples were collected using a manta trawl fitted with a 333 μm mesh (21 samples in 2013 and 20 samples in 2014). Several types of plastic particles were observed in 95% of the stations. A total of 1463 plastic microparticles (<5 mm; mps) and 208 mesoparticles (>5 mm and <20 mm; MPS) were counted. Average concentrations recorded were 0.034 ± 0.032 and 0.176 ± 0.278 mps m−2 and 0.005 ± 0.005 and 0.028 ± 0.043 MPS m−2, respectively for 2013 and 2014. Results on this emerging topic are discussed as a...
Tipo: Text Palavras-chave: Marine litter; Floating plastics; Microplastics; European MSFD; NW Spain.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00275/38605/37469.pdf
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Global Distribution, Composition and Abundance of Marine Litter ArchiMer
Galgani, Francois; Hanke, Georg; Maes, Thomas.
Marine debris is commonly observed everywhere in the oceans. Litter enters the seas from both land-based sources, from ships and other installations at sea, from point and diffuse sources, and can travel long distances before being stranded. Plastics typically constitute the most important part of marine litter sometimes accounting for up to 100 % of floating litter. On beaches, most studies have demonstrated densities in the 1 item m−2 range except for very high concentrations because of local conditions, after typhoons or flooding events. Floating marine debris ranges from 0 to beyond 600 items km−2. On the sea bed, the abundance of plastic debris is very dependent on location, with densities ranging from 0 to >7700 items km−2, mainly in coastal...
Tipo: Text Palavras-chave: Marine litter; Plastic; Distribution; Beaches; Seafloor; Microplastics; Floating litter.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00667/77914/80097.pdf
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Impact of hydrolytic degradation on mechanical properties of PET - Towards an understanding of microplastics formation ArchiMer
Arhant, Mael; Le Gall, Maelenn; Le Gac, Pierre Yves; Davies, Peter.
Ocean pollution by microplastics, i.e. small pieces of plastic of less than 5 mm, is one of the major concerns for the future of our planet. Secondary microplastics formation is due to fragmentation of macroplastic waste. This fragmentation can be attributed to environmental loadings such as waves, winds and tides, coupled with a change in mechanical properties of polymers induced by UV and seawater ageing. This study aims to characterize and understand changes in the mechanical behaviour of Polyethylene Terephthalate (PET) induced by hydrolysis, especially for high degradation levels. Thin films (200 microns) of PET were aged in water at temperatures from 110 °C to 80 °C for up to 150 days. Embrittlement occurs with chain scission during hydrolysis when...
Tipo: Text Palavras-chave: Hydrolysis; Polyethylene terephthalate; Mechanical properties; Molar mass; Embrittlement; Microplastics.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00476/58794/61331.pdf
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Large impact of Stokes drift on the fate of surface floating debris in the South Indian Basin ArchiMer
Dobler, Delphine; Huck, Thierry; Maes, Christophe; Grima, Nicolas; Blanke, Bruno; Martinez, Elodie; Ardhuin, Fabrice.
In the open ocean, floating surface debris such as plastics concentrate in five main accumulation zones centered around 30° latitude, far from highly turbulent areas. Using Lagrangian advection of numerical particles by surface currents from ocean model reanalysis, previous studies have shown long-distance connection from the accumulation zones of the South Indian to the South Pacific oceans. An important physical process affecting surface particles but missing in such analyses is wave-induced Stokes drift. Taking into account surface Stokes drift from a wave model reanalysis radically changes the fate of South Indian particles. The convergence region moves from the east to the west of the basin, so particles leak to the South Atlantic rather than the...
Tipo: Text Palavras-chave: Marine debris; Microplastics; Stokes drift; Indian Ocean; Lagrangian analysis; Ocean surface pathways.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00512/62320/69273.pdf
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Les microplastiques : une menace en rade de Brest ? ArchiMer
Frere, Laura.
World production of plastics has increased steadily for the past decades leading to a major contamination of the worldwide aquatic ecosystems recently estimated at more than five trillion plastic pieces floating the surface of the oceans. Microplastics (plastic particles < 5 mm) are introduced into aquatic environments directly as industrial raw material (plastic pellets, cosmetics, clothing) or indirectly via the fragmentation of larger plastics. This emerging contaminant represents an increasing ecological concern for science and society. The present study focused on the microplastic contamination of the Bay of Brest (Brittany, France), a macrotidal coastal ecosystem characterized by intense anthropogenic activity. The main objectives were: (1) to...
Tipo: Text Palavras-chave: Microplastiques; Micro-spectroscopie Raman; Matrices environnementales; Rade de Brest; Polluant organique; Communautés bactériennes; Microplastics; Micro-spectroscopy Raman; Environmental matrices; Bay of Brest; Organic pollutant; Bacterial communities.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00497/60913/64266.pdf
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Lessons learned from an intercalibration exercise on the quantification and characterisation of microplastic particles in sediment and water samples ArchiMer
Cadiou, Jean-francois; Gerigny, Olivia; Koren, Š.; Zeri, C.; Kaberi, H.; Alomar, C.; Panti, C.; Fossi, M.c.; Adamopoulou, A.; Digka, N.; Deudero, S.; Concato, M.; Carbonell, A.; Baini, M.; Galli, M.; Galgani, Francois.
An intercalibration exercise on the characterisation of microplastics in marine sediment and water samples was carried out among five laboratories involved in the implementation of the Marine Strategy Framework Directive (MSFD) in their country. The samples were prepared by mixing cleaned natural sediment and sea water with microplastics sets made of particles of various polymers, shapes and colours. Overall, the errors on total counts were under 25% in absolute value. The risk of non-detection and loss of particles is greater than the risk of contamination during sample analysis. Significant differences are observed among particle types. It appears difficult to obtain reliable and comparable data on the colour of microplastics. A comparison of the errors...
Tipo: Text Palavras-chave: Microplastics; Intercalibration; Protocols; Sediment; Seawater.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00622/73397/72812.pdf
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Managing the analytical challenges related to micro- and nanoplastics in the environment and food: filling the knowledge gaps ArchiMer
Alexy, Pavol; Anklam, Elke; Emans, Ton; Furfari, Antonino; Galgani, Francois; Hanke, Georg; Koelmans, Albert; Pant, Rana; Saveyn, Hans; Sokull Kluettgen, Birgit.
This paper identifies knowledge gaps on the sustainability and impacts of plastics and presents some recommendations from an expert group that met at a special seminar organised by the European Commission at the end of 2018. The benefits of plastics in society are unquestionable, but there is an urgent need to better manage their value chain. The recently adopted European Strategy for Plastics stressed the need to tackle the challenges related to plastics with a focus on plastic litter including microplastics. Microplastics have been detected mainly in the marine environment, but also in freshwater, soil and air. Based on today’s knowledge they may also be present in food products. Although nanoplastics have not yet been detected, it can be assumed that...
Tipo: Text Palavras-chave: Plastic; Microplastics; Nanoplastics; Marine litter; Recycling; Circular economy.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00588/70027/67935.pdf
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Marine litter, future prospects for research ArchiMer
Galgani, Francois.
As far back as 1870, i.e., about 150 years ago, Jules Verne described the accumulation of debris in the convergence zone of the North Atlantic Ocean in his famous novel entitled “Twenty Thousand Leagues under the Sea.” Many scientific reports have addressed this topic since and our main concern today is the ever increasing volume of marine litter invading the oceans in various and complex ways. One of the current main challenges is assessing the final destination of this litter. To date, its adverse effects on marine life have only occasionally been investigated and many questions remain unanswered. In addition to efforts to monitor and reduce litter, recent literature has underlined the scientific community's focus on specific issues such as (i) the...
Tipo: Text Palavras-chave: Marine litter; Microplastics; Marine debris; Trophic chains; Chemicals; Rafting.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00358/46933/46837.pdf
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Marine pollution: Let us not forget beach sand ArchiMer
Galgani, Francois; Ellerbrake, Katrin; Fries, Elke; Goreux, Chantal.
Background: Assessing the chemical or bacterial contamination in marine waters and sediments is a very common approach to evaluate marine pollution and associated risks. However, toxicity and organic pollution of beach sands have not yet been considered, except in adjacent waters. In the present study, the toxicity and the chemical contamination of natural beach sands collected 20 m from the shoreline at two sites located on the Mediterranean Sea (Marseille and La Marana, Corsica) were studied. Results: Up to 16.93% (net percentage) abnormal or dead larvae was observed in elutriates prepared from the urban beach sand sample (Marseille); no significant toxicity was observed in the sample collected from the reference beach in La Marana. Results of Fourier...
Tipo: Text Palavras-chave: Oyster larvae biotests; Sediments; Infrared spectroscopy; Gas chromatography-mass spectrometry; Microplastics; Polycyclic aromatic hydrocarbons; Mediterranean Sea; Bioavailability; Organic contaminants.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00353/46442/46186.pdf
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Microplastic bacterial communities in the Bay of Brest: Influence of polymer type and size ArchiMer
Frere, Laura; Maignien, Lois; Chalopin, Morgane; Huvet, Arnaud; Rinnert, Emmanuel; Morrison, Hilary; Kerninon, Sandrine; Cassone, Anne-laure; Lambert, Christophe; Reveillaud, Julie; Paul-pont, Ika.
Microplastics (<5 mm) exhibit intrinsic features such as density, hydrophobic surface, or high surface/volume ratio, that are known to promote microbial colonization and biofilm formation in marine ecosystems. Yet, a relatively low number of studies have investigated the nature of microplastic associated bacterial communities in coastal ecosystems and the potential factors influencing their composition and structure. Here, we characterized microplastics collected in the Bay of Brest by manual sorting followed by Raman spectroscopy and studied their associated bacterial assemblages using 16S amplicon high-throughput sequencing. Our methodology allowed discriminating polymer type (polyethylene, polypropylene and polystyrene) within small size ranges...
Tipo: Text Palavras-chave: Bacteria; Microplastics; Coastal ecosystem; Metabarcoding; Vibrios.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00449/56082/57614.pdf
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Microplastics baseline surveys at the water surface and in sediments of the North-East Atlantic ArchiMer
Maes, Thomas; Van Der Meulen, Myra D; Devriese, Lisa L.; Leslie, Heather A.; Huvet, Arnaud; Frere, Laura; Robbens, Johan; Vethaak, Dick A..
Microplastic contamination was determined in sediments of the Southern North Sea and floating at the sea surface of North West Europe. Floating concentrations ranged between zero and 1.5 microplastic/m3, whereas microplastic concentrations in sediments ranged between zero and 3146 particles/kg dry weight sediment. In sediments, mainly fibers and spheres were found, whereas at the sea surface fragments were dominant. At the sea surface, concentrations of microplastics are lower and more variable than in sediments, meaning that larger sample sizes and water volumes are required to find detectable concentrations. We have calculated the widths of the confidence intervals (CI) for different sample sizes, to give a first indication of the necessary sample size...
Tipo: Text Palavras-chave: Microplastics; Marine litter; Floating debris; Sediment; Marine Strategy Framework Directive (MSFD); Baseline.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00384/49505/49999.pdf
Registros recuperados: 30
Primeira ... 12 ... Última
 

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