Overview of analytical methods for the determination of microplastics: Current status and trends

TrAC Trends in Analytical Chemistry, Journal Year: 2023, Volume and Issue: 167, P. 117261 - 117261

Published: Sept. 1, 2023

Language: Английский

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Microplastic pollution in the marine environment: Distribution factors and mitigation strategies in different oceans

Journal of Contaminant Hydrology, Journal Year: 2025, Volume and Issue: 269, P. 104496 - 104496

Published: Jan. 5, 2025

Language: Английский

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A particle tracking model approach to determine the dispersal of riverine plastic debris released into the Indian Ocean

Marine Pollution Bulletin, Journal Year: 2024, Volume and Issue: 199, P. 115985 - 115985

Published: Jan. 6, 2024

Although the Indian Ocean receives a large amount of land-based plastic waste, studies on pathways riverine debris are limited to date. Therefore, particle tracking model that included ocean surface currents, horizontal diffusion, Stokes drift, windage, and beaching/re-drifting processes was developed reproduce behavior in Ocean. The modeled particles were released domain based database. maximum abundance beached occurred during southwesterly monsoon season, particularly Bay Bengal. from rivers trapped northern unless both drift windage excluded transportation velocity. These results suggest until it fragmented into less buoyant small microplastics drifting subsurface layer, free at increasing depths.

Language: Английский

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Anaerobic Biodegradability of Commercial Bioplastic Products: Systematic Bibliographic Analysis and Critical Assessment of the Latest Advances

Materials, Journal Year: 2023, Volume and Issue: 16(6), P. 2216 - 2216

Published: March 9, 2023

Bioplastics have entered everyday life as a potential sustainable substitute for commodity plastics. However, still further progress should be made to clarify their degradation behavior under controlled and uncontrolled conditions. The wide array of biopolymers commercial blends available make predicting the biodegradation degree kinetics quite complex issue that requires specific knowledge multiple factors affecting process. This paper summarizes main scientific literature on anaerobic digestion biodegradable plastics through general bibliographic analysis more detailed discussion results from relevant experimental studies. critical data initially included 275 references, which were then screened duplication/pertinence/relevance. references analyzed derive some features research profile, trends, evolution in field bioplastics. second stage involved extracting about bioplastic degradability conditions by screening analytical performance different types products conditions, with particular emphasis most recent data. A overview existing is presented, along properties mechanisms operating parameters influencing/enhancing process

Language: Английский

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Legacy oceanic plastic pollution must be addressed to mitigate possible long-term ecological impacts

Microplastics and Nanoplastics, Journal Year: 2023, Volume and Issue: 3(1)

Published: Nov. 13, 2023

Abstract Scientific research over the past decade has demonstrated that plastic in our oceans detrimental consequences for marine life at all trophic levels. As countries negotiate an international legally binding instrument on pollution, focus is eliminating emissions to environment. Here, we argue that, while this endeavour urgently needed limit negative impacts of ocean ecosystems, reduction flow environment should not be sole purpose negotiations. Legacy oceanic pollution also a major concern needs addressed coming Treaty. Plastic ubiquitous and persistent environment, its slow degradation produces uncountable amounts potentially even more impactful micro- nanoparticles. Thus, already present may continue affect ecosystems centuries. Recent global assessments reveal microplastics could have significant impact biogeochemical cycles microbial food chains within equivalent those climate change. Therefore, cleanup initiatives are essential avoid further longterm legacy pollution. The upcoming negotiations develop new Global Plastics Treaty aim reducing supporting innovative solutions towards efficient monitoring

Language: Английский

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Preliminary assessment of microplastic pollution in surface waters of the Santos Basin: abundance and diversity in the most important oil and gas exploration hub in Brazil

Ocean and Coastal Research, Journal Year: 2025, Volume and Issue: 73

Published: Jan. 1, 2025

Abstract Microplastics (Mps) are pervasive in the surface waters of Santos Basin, a critical maritime zone along Southeast coast Brazil, vital to both fishing and oil production. This study sought assess potential disparities abundance, types, colors, sizes microplastics various locations seasons near gas exploration areas. Seven stations were sampled using Van Dorn-type bottles during two campaigns, June 2020 January 2021, encompassing winter summer seasons. Concurrently, wind, current, wave data recorded investigate their impact on microplastic distribution. Microparticles meticulously assessed by counting, classifying, measuring, photographing an optical microscope. The results unveiled considerable concentration putative Basin waters, identifying collecting total 1,006 particles. All exhibited some degree microparticles contamination, with counts ranging from 67 272 particles per station. average particulate stood at 159.7 liter (Mp/L). While concentrations varied across sampling points, statistical analysis indicated no significant differences (p = 0.5062 – ANOVA test p < 0.05). Fragmented pieces constituted most (51.8%) microplastics, followed films (24%) fibers (16.4%), displaying diverse blue (31.11%) transparent (27.63%) being prevalent. Particles measuring 50 μm or less comprised over 30%, while those smaller than 400 µm about 90% microparticles. microparticle for 10.6 43.17 Mp/L, was surprisingly similar other regions without exploration. underscores high prevalence highlights role oceanographic factors, including waves, currents, shaping dynamics contamination this economically ecologically region.

Language: Английский

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The distribution of subsurface microplastics in the ocean

Nature, Journal Year: 2025, Volume and Issue: 641(8061), P. 51 - 61

Published: April 30, 2025

Marine plastic pollution is a global issue, with microplastics (1 µm-5 mm) dominating the measured count1,2. Although can be found throughout oceanic water column3,4, most studies collect from surface waters (less than about 50-cm depth) using net tows5. Consequently, our understanding of distribution across ocean depths more limited. Here we synthesize depth-profile data 1,885 stations collected between 2014 and 2024 to provide insights into potential transport mechanisms subsurface (below depth, which not usually sampled by traditional practices3,6) column. We find that abundances range 10-4 104 particles per cubic metre. Microplastic size affects their distribution; abundance small µm 100 µm) decreases gradually indicating even longer lifespan in column compared larger (100 5,000 tend concentrate at stratified layers. Mid-gyre accumulation zones extend but are concentrated top m predominantly consist microplastics. Our analysis suggests constitute measurable fraction total particulate organic carbon, increasing 0.1% 30 5% 2,000 m. study establishes benchmark, findings underscore lack standardization creates substantial uncertainties, making it challenging advance comprehension its impact on environment.

Language: Английский

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Towards sustainability by integrated microbial degradation and closed-loop biological recycling of the copolymer poly (3-hydroxybutyrate-co-3-hydroxyvalerate) by Azohydromonas australica DSM 1124

Polymer Degradation and Stability, Journal Year: 2025, Volume and Issue: unknown, P. 111420 - 111420

Published: May 1, 2025

Language: Английский

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From source to sink: part 1—characterization and Lagrangian tracking of riverine microplastics in the Mediterranean Basin

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 17, 2024

Abstract The Mediterranean Sea is one of the most critically polluted areas due to its semi-enclosed structure and highly anthropized shoreline. Rivers are significant vectors for pollutant transfers from continental marine environment. In this context, a 3D Lagrangian simulation dispersion riverine microplastics (MPs) was performed, which included application recently developed model that reassessed MP fluxes discharged by rivers. physical properties river samples were further investigated approximate vertical displacement in modeled ocean currents. use high-resolution circulation model, integrating Stokes drift, turbulent diffusion, sinking rising velocities, enabled us establish stock balances. Our suggested 65% inputs may be made floating MPs drifting surface layer 35% dense deeper layers. Eastern tends accumulate MPs, primarily originating Western Basin, where major sources concentrated. After 2 years simulation, stranding sequestered 90% inputs, indicating relatively short average residence times few days months at particles sea. Although spatial distribution patterns stabilized after period steady state have been approached, concentrations we generally remained below field observations. This either an underestimation (rivers unaccounted sources), factor 6 most, or overestimation withdrawal through stranding, reduced 90 around 60% less if sinks considered. Graphical abstract

Language: Английский

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A non-invasive laboratory technique for wave-driven plastic debris motion detection

2022 IEEE International Workshop on Metrology for the Sea; Learning to Measure Sea Health Parameters (MetroSea), Journal Year: 2023, Volume and Issue: unknown, P. 410 - 414

Published: Oct. 4, 2023

In recent years some non-invasive approaches have been developed for the study of wave effects on plastic particle displacement. Although, most these techniques are not capable direct extraction continuous information related to mobility. Currently, at University Messina, an innovative technique motion detection under action is aimed provide transport. Such a based analysis video recording through computer vision algorithms. This paper presents results calibration and validation processes carried out using data obtained by experimental campaign conducted non-buoyant particles Hydraulics Laboratory Messina.

Language: Английский

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