A review of microplastic transport in coastal zones

Marine Environmental Research, Год журнала: 2024, Номер 196, С. 106397 - 106397

Опубликована: Фев. 7, 2024

Язык: Английский

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A review of plastic debris in the South American Atlantic Ocean coast – Distribution, characteristics, policies and legal aspects

The Science of The Total Environment, Год журнала: 2024, Номер 938, С. 173197 - 173197

Опубликована: Май 19, 2024

Язык: Английский

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A wave-resolving two-dimensional vertical Lagrangian approach to model microplastic transport in nearshore waters based on TrackMPD 3.0

Geoscientific model development, Год журнала: 2025, Номер 18(2), С. 319 - 336

Опубликована: Янв. 22, 2025

Abstract. Potentially acting as a source or sink for plastic pollution to the open ocean, nearshore waters remain challenging context predicting transport and deposition of debris. In this study, we present an advanced modeling approach based on SWASH wave model TrackMPD (v3.0) particle investigate dynamics floating sinking microplastics in wave-dominated environments. This introduces novel features such coupling with turbulence models, simulating resuspension bedload processes, implementing settling rising velocity formulations, enabling parallel computation. The laboratory experiments conducted by Forsberg et al. (2020) were simulated validate model's ability reproduce diverse (varying density, shape, size) along comprehensive beach profile, capturing whole water column. Our results underscore robustness proposed model, showing good agreement experimental data. High-density moved onshore near bed, accumulating proximity wave-breaking zone, while distribution low-density particles varied coastal profile depending properties. study also sheds light primary mechanisms driving microplastic transport, Stokes drift, asymmetry, settling/rising velocities. Sensitivity analyses calibration parameters further confirm influence these factors patterns. research establishes SWASH–TrackMPD valuable tool, opening avenues future studies contextualize findings within complexities real-world environments refine our comprehension across different beaches wave-climate conditions.

Язык: Английский

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Processes controlling the dispersion and beaching of floating marine debris in the Barcelona coastal region

Frontiers in Marine Science, Год журнала: 2025, Номер 11

Опубликована: Янв. 27, 2025

Introduction Coastal areas are considered potential sinks for plastic in marine environments. Data from a Lagrangian numerical simulation at coastal scale using high-resolution hydrodynamic information and observational data of river debris discharge were analysed to determine the environmental variables meteorological forcing or coastline orientation contributing particle beaching. Method A beaching likelihood parameter was developed quantitatively measure propensity an area receive accumulate particles known outflow source. Statistical analyses conducted reveal possible relationships with variables. mass budget calculated release used simulation. Results Areas close points received highest amounts also registered values. Significant wave height mildly affected (Pearson’s r =0.36). Relative perpendicular directions promoted coastlines lower azimuths (vertical orientation), whereas those higher (horizontal orientation) more by relative alongshore directions. The contribution on beaches where cleanup available 6.0% total collected. Discussion revealed influence geometry deposition area. Comparisons other studies regarding residence times challenging due difference. complexity process makes it difficult establish variables, although clear association between direction established. two rivers included orders magnitude than indicated

Язык: Английский

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Experimental study of buoyant macro- and mesoplastic trapping by Spartina maritima

Marine Pollution Bulletin, Год журнала: 2025, Номер 216, С. 118005 - 118005

Опубликована: Апрель 19, 2025

A set of laboratory experiments was conducted to assess the trapping efficiency buoyant plastic debris by estuarine vegetation Spartina maritima. Different hydrodynamic conditions typical salt marshes were simulated in a hydraulic flume. These included varying water levels between 40% and 90% stem height, wind speeds up 2 m/s, unidirectional current velocities 0.1 0.3 m/s. Moreover, three densities (small/medium/high) nine types shape (elongated/two-dimensional/three-dimensional) size (macro/meso) tested. The results indicate that maritima functions as natural trap. Specifically, study highlights lower surface velocities, higher densities, greater emergent heights, larger sizes significantly enhance efficiency. It also inferred for density comparable observed marshes, dominance velocity or effects on is primarily dependent shape. Consequently, has impact two-dimensional elements, whereas more significant three-dimensional elements. Finally, preliminary model developed integrate all aforementioned variables. This potential accuracy numerical predictions regarding transport fate using Lagrangian modeling, can be further refined incorporating additional data.

Язык: Английский

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Modeling the Potential Source Routes of Marine Macroplastics on a Beach Adjacent to the Patos Lagoon Estuary, South Brazil

Опубликована: Янв. 1, 2025

Язык: Английский

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Biofilm-induced effect on the buoyancy of plastic debris: An experimental study

Marine Pollution Bulletin, Год журнала: 2023, Номер 193, С. 115239 - 115239

Опубликована: Июль 15, 2023

Plastic floating on the ocean surface represents about 1 % of all plastic in ocean, despite buoyancy most plastics. Biofouling can help to sink debris, which could explain this discrepancy. A set laboratory experiments was conducted investigate biofilm-induced effects different debris. Ten materials densities (buoyant/non-buoyant), sizes (micro/meso/macro), and shapes (irregular/spherical/cylindrical/flat), including facemasks cotton swabs, were evaluated. Biofilm incubated these from a few weeks three months effect growth levels their buoyancy. rising/settling velocities measured compared at seven time-points. The results show hindered for solid materials, while hollow open showed opposite trend early biofilm colonization stages. relationship established between biofilm-growth equivalent sphere diameter that be used improve predictive modeling plastic-debris transport.

Язык: Английский

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Short-term buoyant microplastic transport patterns driven by wave evolution, breaking, and orbital motion in coast

Marine Pollution Bulletin, Год журнала: 2024, Номер 201, С. 116248 - 116248

Опубликована: Март 13, 2024

Язык: Английский

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Rigid fibre transport in a periodic non-homogeneous geophysical turbulent flow

Journal of Fluid Mechanics, Год журнала: 2025, Номер 1011

Опубликована: Май 16, 2025

From anthropogenic litter carried by ocean currents to plant stems travelling through the atmosphere, geophysical flows are often seeded with elongated, fibre-like particles. In this study, we used a large-scale laboratory model of tidal current – representative widespread class investigate tumbling motion long, slender and floating fibres in complex turbulence generated flow interactions inlet. Despite non-stationary, non-homogeneous anisotropic nature turbulence, find that long statistically rotate at same frequency as eddies similar size, phenomenon called scale selection, which is known occur ideal turbulence. Furthermore, report signal instantaneous transverse velocity difference between fibre ends changes significantly from produced surroundings, although two equivalent. These observations have twofold implications. On one hand, they confirm reliability using end-to-end rigid probe two-point statistics flow, even under realistic conditions: oceanographers could exploit observation measure differences elongated floats field, where superdiffusion complicates collecting sufficient data fixed separation effectively. other addressing dynamics inertial range particles coastal zone, these crucial improving our ability predict fate meso- macro-litter, size currently understudied.

Язык: Английский

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Microplastic retention in marine vegetation canopies under breaking irregular waves

The Science of The Total Environment, Год журнала: 2023, Номер 912, С. 169280 - 169280

Опубликована: Дек. 19, 2023

The present study provides indications and underlying drivers of wave-induced transport retention potential microplastic particles (MP) in marine vegetation canopies having different densities. anthropogenic occurrence MP coastal waters is well documented the recent literature. It acknowledged that can serve as a sink for due to its energy dissipating features, which mimic novel ecosystem service. While behavior has previously been investigated some extent stationary flow conditions, fundamental investigations unsteady surf zone conditions under irregular waves are still lacking. Herein, we demonstrate by means hydraulic model tests vegetation's increases with shoot density, settling velocity decreasing wave energy. found migrating traction (predominantly contact bed) trapped wake regions around canopy, whereas suspended able pass vegetated areas more easily. Very dense also promote passage diameters larger than plant spacing, then show characteristics solid sill avoid particle penetration. migration ability through canopy quantified, key described an empirical expression based on velocity, length density. findings this may contribute improved prediction assessment accumulation hotspots and, thus, help tracing sinks. Such knowledge be considered prerequisite develope methods or new technologies recover plastic pollutants rehabilitate valuable environments.

Язык: Английский

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