Model-based estimation of seasonal transport of macro-plastics in a marine protected area

Marine Pollution Bulletin, Journal Year: 2024, Volume and Issue: 201, P. 116191 - 116191

Published: Feb. 29, 2024

Management of plastic litter in Marine Protected Areas (MPAs) is expensive but crucial to avoid harms critical environments. In the present work, an open-source numerical modelling chain proposed estimate seasonal pathways and fates macro-plastics, hence support effective planning implementation sea beach cleaning operations. The approach applied nearshore region that includes MPA Capo Milazzo (Italy). A sensitivity analysis on influence tides, wind, waves river floods over year indicates seasonality only slightly affects location extension macro-plastic accumulation zones, operations should be performed autumn. Instead, rivers distribution for optimal interventions coastal area.

Language: Английский

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Modeling of Microplastics Migration in Soil and Groundwater: Insights into Dispersion and Particle Property Effects

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 1, 2024

Migration of microplastics (MPs) in soil–groundwater systems plays a pivotal role determining its concentration aquifers and future threats to the terrestrial environment, including human health. However, existing models employing an advection–dispersion equation are insufficient incorporate holistic mechanism MP migration. Therefore, bridge gap associated with migration systems, dispersion–drag force coupled model incorporating drag on MPs along dispersion is developed validated through laboratory field-scale experiments. The inclusion notably increased global maximum particle velocity (vmaxp) MPs, resulting higher aquifer, which also established by sensitivity analysis dispersion. Additionally, increasing irrigation flux areas significantly accelerates downward from soil deep saturated aquifers. Intriguingly, vmaxp exhibited nonlinear relationship MPs' sizes smaller than 20 μm reaching highest value (=1.64 × 10–5 m/s) at size 8 μm, while decreasing trend was identified for ranging 100 because hindered effect porous media weaker force. Moreover, distinct behaviors were observed among different plastic types, poly(vinyl chloride), characterized density, displaying lowest minimal entering groundwater. Furthermore, presence heterogeneous structure lower hydraulic conductivity facilitated promoted their findings shed light effective strategies mitigate impact aquifers, contributing valuable insights broader scientific fraternity.

Language: Английский

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The missing small microplastics: easily generated from weathered plastic pieces in labs but hardly detected in natural environments

Environmental Science Advances, Journal Year: 2023, Volume and Issue: 3(2), P. 227 - 238

Published: Dec. 12, 2023

Plentiful small microplastics and nanoplastics can easily generate from weathered plastics, but few no nanoplatics could be detected in surrounding sediments, possibly due to a lack of suitable detection approach.

Language: Английский

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Use of an uncrewed surface vehicle and near infrared hyperspectral imaging for sampling and analysis of aquatic microplastics

Marine Pollution Bulletin, Journal Year: 2024, Volume and Issue: 201, P. 116214 - 116214

Published: March 7, 2024

Data on MP in aquatic environments have low resolution space and time. Scaling up sampling increasing analysis throughput are the main bottlenecks. We combined two approaches: an uncrewed surface vehicle (USV) near infrared hyperspectral imaging (NIR-HSI) for of > 300 μm. collected 35 water samples over 4 d a coastal area. Samples were analyzed using NIR-HSI Fourier transform spectroscopy (FTIR). Spiked used to determine recovery. conclude that USV can mitigate issues traditional trawls like scalability, repeatability, contamination. detects more polyethylene but less polypropylene than FTIR reduces time significantly. Highly variable concentrations found at both locations, with mean concentration 0.28 0.01 m

Language: Английский

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LOCATE v1.0: numerical modelling of floating marine debris dispersion in coastal regions using Parcels v2.4.2

Geoscientific model development, Journal Year: 2024, Volume and Issue: 17(6), P. 2221 - 2245

Published: March 19, 2024

Abstract. The transport mechanisms of floating marine debris in coastal zones remain poorly understood due to complex geometries and the influence processes, posing difficulties incorporating them into Lagrangian numerical models. model LOCATE overcomes these challenges by coupling Eulerian hydrodynamic data at varying resolutions within nested grids using Parcels, a particle solver, accurately simulate motion plastic particles where high spatial coverage resolution are required resolve processes. Nested performed better than coarse-resolution grid when analysing model's dispersion skill comparing drifter simulated trajectories. A sensitivity analysis different beaching conditions spatiotemporal patterns demonstrated notable differences land–water boundary detection between high-resolution shoreline data. latter formed basis for module that parameterised calculating distance shore during simulation. realistic discharge scenario comparison around Barcelona coastline distance-based conjunction with or revealed very levels (>91.5%) each case, demonstrating importance appropriately parameterising scales. In this scenario, variability residence times was observed simulations. These derived from how option resolved shoreline, being much higher areas intricate configurations grids, thus resolving structures were undetectable grid. can effectively integrate deposition scales uniformity.

Language: Английский

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Photodegradation Controls of Potential Toxicity of Secondary Sunscreen-Derived Microplastics and Associated Leachates

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: March 8, 2025

The escalating environmental concern over secondary microplastics (SMPs) stems from their physicochemical evolution primary (PMPs), yet the contribution of varying transformations to ultimate risks remains unknown. In this study, a photomechanical degradation process was employed convert sunscreen-derived (SDMPs) into SDMPs. While mechanical caused physical fragmentation, photodegradation induced both and chemical alterations, introducing surface oxidation, bond scission, cross-linking Employing combination alkaline digestion pyrolysis GC-MS techniques, it observed that fragmentation photooxidation led heightened intracellular sequestration MPs. Although bioaccumulated SDMPs could be indicated by enlarged lysosomes fragmented mitochondria, toxicity at cellular level primarily driven post-photodegradation. A nontargeted analysis employing high-resolution mass spectrometry identified 46 plastic-associated compounds in leachate, with photodegradation-induced playing crucial role dissociation hydrophobic additives oxidative conversion leached compounds. leachate exacerbated photodegradation, mitochondrial serving as subcellular biomarker, indicative toxicity. This study elucidates pivotal augmenting cytotoxicity SDMPs, shedding light on intricate interplay between risks.

Language: Английский

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Interaction and driving factors influencing microplastics and dissolved organic matter in the hyporheic ecosystem of the Jinghe River Basin under different land-use types

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: unknown, P. 137967 - 137967

Published: March 1, 2025

Language: Английский

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Long-term variations in size and polymer type of meso- and microplastics in seabirds and on beaches since the 1980s

Environmental Pollution, Journal Year: 2025, Volume and Issue: unknown, P. 126125 - 126125

Published: March 1, 2025

Language: Английский

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Impact of seasonal variations on microplastic accumulation and characteristics in sandy beaches of Sichang Island, the inner Gulf of Thailand

Marine Pollution Bulletin, Journal Year: 2025, Volume and Issue: 215, P. 117936 - 117936

Published: April 8, 2025

Language: Английский

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Spatial Distribution of Microplastic Pollution and Its Relation to Pollution Index-based Water Quality Status in Progo River, Indonesia

Emerging contaminants, Journal Year: 2025, Volume and Issue: unknown, P. 100510 - 100510

Published: April 1, 2025

Language: Английский

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