Experimental Visualization and Modeling of the Transport Behaviors of Monofilament Microplastic Fibers Through an Idealized Porous Media DOI Creative Commons

Tyler T. Fouty,

Nicholas B. Engdahl

Water Resources Research, Journal Year: 2024, Volume and Issue: 60(11)

Published: Oct. 30, 2024

Abstract Microplastic fibers (MPF) are the largest fraction of microplastics in environment by mass. The endpoints these contaminants' movement is generally known at large‐scale (i.e., their origins and where they end up), but mechanics how get to those sinks remains poorly understood. objective this work was improve understanding mechanisms driving MPF migration through terrestrial systems directly imaging motion idealized representations porous media. Monofilament line with 0.3 mm diameter passed a bench‐scale, pseudo‐2d flow cell capture trajectories MPFs three different lengths passive micro‐bead tracers were also captured. Video processing automated image analysis converted video experiments into database trajectories, allowing comparison experimental data various numerical models. Simple advection‐dispersion models adequate for modeling tracer did not provide good description transport. A physics‐based, distributed model able generate realistic domain, speeds initial simulation too fast, despite working well tracer. Adding delay (waiting time) process resulted travel times. specifics could be deduced from experiments, its overall impact on transport provides mechanistic insights. These direct observation moving media show that likely have strong interactions surroundings.

Language: Английский

Assessing the Behavior of Microplastics in Fluvial Systems: Infiltration and Retention Dynamics in Streambed Sediments DOI Creative Commons
Jan‐Pascal Boos, Franz Dichgans, Jan H. Fleckenstein

et al.

Water Resources Research, Journal Year: 2024, Volume and Issue: 60(2)

Published: Feb. 1, 2024

Abstract Microplastics (MPs) have been detected ubiquitously in fluvial systems and advective transfer has proposed as a potential mechanism for the transport of (sub‐) pore‐scale MPs from surface waters into streambed sediments. However, influence particle sediment properties, well hydrodynamic flow regime, on infiltration behavior mobility sediments remains unclear. In this study, we conducted series flume experiments to investigate effect size (1–10 μm), type (fine coarse sand), regime (high/low flow) dynamics rippled streambed. Quantification particles compartments (surface flow, interface, streambed) was achieved using continuous fluorescence techniques. Results indicated that maximum depth decreased with increasing (11, 10, 7 cm 1, 3, 10 μm). The highest retardation observed fine experiment, where 22% were still at end experiment. Particle residence times shortest under high conditions, suggesting periods increased discharge can effectively flush This study provides novel insights complex MP retention contributes better understanding fate ecosystems. Quantitative data improve existing modeling frameworks assist assessing exposure risk ingestion by benthic organisms.

Language: Английский

Citations

9
Transport dynamics of microplastics within aquatic vegetation featuring realistic plant morphology DOI Creative Commons

Mingqi Guo,

Stefan A. F. Bon, Soroush Abolfathi

et al.

Water Research, Journal Year: 2025, Volume and Issue: 282, P. 123534 - 123534

Published: April 6, 2025

Despite the significance of rivers and streams in transporting terrestrial microplastics (MP) to oceans, limited research has focused on role aquatic vegetation their complex geometry shaping underlying mechanisms governing MP mixing dispersion processes riverine environments. This study, for first time, investigates transport fate non-buoyant MPs, specifically those with diameters 188 nm 6μm a density 1.04 g/cm3, floating Eichhornia crassipes canopies under flow conditions typical natural (0.0167-0.0667 m/s). Physical modelling tests reveal that significantly alters hydrodynamic structure enhances dissipation turbulence water column, leading decreased velocities, diversified length scales, increased turbulent kinetic energy (TKE) regions higher frontal areas. turbulence, turn, facilitated momentum exchange vertical mixing, particularly most pronounced area changes. Wider canopy spacing promoted evolution wake expansion throughout generating coherent structures effectively doubled integral scales increasing distance between from 0.5 m 1.5 m. adjustment resulted more uniformly dispersed downstream movement MPs. Notably, presence amplified diffusivity by 10-40 times compared equivalent unvegetated conditions, transitioning primary mechanism shear-induced velocity gradients enhanced plant-flow interactions. study offers robust framework quantifying predicting longitudinal coefficients within vegetated flows, developing models depict profiles TKE featured morphology spacing. The insights this make significant contribution towards improving our ability predict MPs environments underscore necessity incorporating dynamics into environmental management risk assessments.

Language: Английский

Citations

1
Comprehensive risk assessment of microplastics in tidal channel sediments in amazonian mangroves (northern Brazil) DOI

Dayene Santiago Mendes,

Daniel Nobre Nunes da Silva,

Luiz Eduardo Pereira Santiago

et al.

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 366, P. 121826 - 121826

Published: July 14, 2024

Language: Английский

Citations

5
Microplastics storage at the sediment-water interface in a gravel-bed river: importance of local hydro-sedimentary conditions in downwelling, upwelling, and sedimentation zones DOI
Mohammad Wazne, Laurent Simon, Stefan Krause

et al.

Water Research, Journal Year: 2025, Volume and Issue: 279, P. 123433 - 123433

Published: March 4, 2025

Language: Английский

Citations

0
Microplastics in groundwater: environmental fate and possible interactions with coexisting contaminants DOI
Shengfeng Liu, Chengcheng Li, Jochen Bundschuh

et al.

Environmental Pollution, Journal Year: 2025, Volume and Issue: unknown, P. 126026 - 126026

Published: March 1, 2025

Language: Английский

Citations

0
Factors Influencing the Vertical Distribution and Transport of Plastics in Riverine Environments: Theoretical Background and Implications for Improved Field Study Design DOI Creative Commons
Jenna Brooks,

Julia F. Hopkins

Environmental Pollution, Journal Year: 2025, Volume and Issue: unknown, P. 126151 - 126151

Published: March 1, 2025

Language: Английский

Citations

0
Mud and organic content are strongly correlated with microplastic contamination in a meandering riverbed DOI Creative Commons
Maarten Van Daele,

Ben Van Bastelaere,

Jens De Clercq

et al.

Communications Earth & Environment, Journal Year: 2024, Volume and Issue: 5(1)

Published: Aug. 22, 2024

The scale of microplastic pollution in river sediments is gradually being elucidated through an increasing number large-scale studies. Nevertheless, distribution within a riverbed – crucial aspect for quantification remains poorly understood. Here we evaluate the meandering River Lys, Belgium, how concentration varies between different sedimentary environments riverbed. We find that abundance about order magnitude higher towards riverbanks compared to thalweg, corresponding with hydrodynamics. Moreover, organic-matter and mud content are robust predictors concentrations, apart from outer bends, where erosion into organic-rich, muddy floodplain inhibits deposition. These results increase our understanding at small scale. They element guide future sampling efforts across diverse systems, paving way normalization better microplastics trapped by other aquatic environments. Microplastic deposition rivers near banks, well correlated organic matter content, according direct measurements campaign Belgium.

Language: Английский

Citations

2
Spatio-temporal trends in microplastic presence in the sediments of the River Thames catchment (UK) DOI Creative Commons
Karolina Skalska, Annie Ockelford, James Ebdon

et al.

Marine Pollution Bulletin, Journal Year: 2024, Volume and Issue: 207, P. 116881 - 116881

Published: Sept. 4, 2024

Language: Английский

Citations

1
Experimental Visualization and Modeling of the Transport Behaviors of Monofilament Microplastic Fibers Through an Idealized Porous Media DOI Creative Commons

Tyler T. Fouty,

Nicholas B. Engdahl

Water Resources Research, Journal Year: 2024, Volume and Issue: 60(11)

Published: Oct. 30, 2024

Abstract Microplastic fibers (MPF) are the largest fraction of microplastics in environment by mass. The endpoints these contaminants' movement is generally known at large‐scale (i.e., their origins and where they end up), but mechanics how get to those sinks remains poorly understood. objective this work was improve understanding mechanisms driving MPF migration through terrestrial systems directly imaging motion idealized representations porous media. Monofilament line with 0.3 mm diameter passed a bench‐scale, pseudo‐2d flow cell capture trajectories MPFs three different lengths passive micro‐bead tracers were also captured. Video processing automated image analysis converted video experiments into database trajectories, allowing comparison experimental data various numerical models. Simple advection‐dispersion models adequate for modeling tracer did not provide good description transport. A physics‐based, distributed model able generate realistic domain, speeds initial simulation too fast, despite working well tracer. Adding delay (waiting time) process resulted travel times. specifics could be deduced from experiments, its overall impact on transport provides mechanistic insights. These direct observation moving media show that likely have strong interactions surroundings.

Language: Английский

Citations

0