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61,005 resultsShowing papers similar to Transport of microplastics in stormwater treatment systems under freeze-thaw cycles: Critical role of plastic density
ClearMobility of polypropylene microplastics in stormwater biofilters under freeze-thaw cycles
Researchers discovered that freeze-thaw cycles move deposited microplastics deeper into stormwater biofilter soil than simple drying-and-wetting cycles, because expanding ice crystals break up the soil and release trapped particles. This finding suggests that in cold climates, microplastics filtered from stormwater could migrate further underground than previously estimated.
UV exposure to PET microplastics increases their downward mobility in stormwater biofilters undergoing freeze–thaw cycles
Researchers found that UV weathering of PET microplastics increases their downward mobility in stormwater biofilters undergoing freeze-thaw cycles, as UV exposure creates polar surface groups that decrease hydrophilicity and enhance particle transport.
Subsurface transport of microplastic particles in gravel columns: Impacts of different rain events and particle characteristics
Researchers conducted column experiments using pre-stained microplastic particles of two density types in gravel sediment to investigate how different rainfall intensities and land-use scenarios influence the vertical transport and retention of microplastics in subsurface environments. The study found that both particle density and rainfall event characteristics significantly affected microplastic mobility through subsurface sediments, informing models of microplastic fate in soil-water systems.
Impact of particle density on the mobility of microplastics in sediments
This study investigates how the density of microplastic particles affects their mobility through soil and potential to reach groundwater, using column experiments with polyethylene particles of different densities. Particle density was found to influence transport behavior, with implications for understanding how microplastics migrate through terrestrial environments.
Revealing the Freezing-Induced Alteration in Microplastic Behavior and Its Implication for the Microplastics Released from Seasonal Ice
Researchers revealed how freeze-thaw cycling alters microplastic behavior in environmental matrices, finding that freezing changes particle aggregation, surface properties, and transport dynamics with implications for polar and seasonally frozen environments.
Denser microplastics migrate deeper? Effect of particle density on microplastics transport in artificial and natural porous media
Researchers conducted saturated column experiments with polyethylene microspheres of different densities in glass bead and gravel porous media to investigate how particle density affects microplastic transport behavior, finding that density significantly influences MP fate and providing transport model fits with R2 above 82.3%.
Behaviour and transport of microplastics under saturated flow conditions in sediments and soils
Researchers investigated the behavior and transport of microplastics under saturated flow conditions in sediments and soils, examining how physical and chemical properties of microplastic particles influence their mobility through porous geological media. The study addressed knowledge gaps in understanding subsurface microplastic transport relevant to groundwater contamination and the fate of microplastics deposited in terrestrial environments.
Vertical migration of microplastics in porous media: Multiple controlling factors under wet-dry cycling
Researchers studied how microplastics move vertically through sandy soil during cycles of wetting and drying, testing four common plastic types at various particle sizes. They found that smaller, more hydrophobic particles migrated deeper, and that frequent wet-dry cycles and the presence of dissolved organic matter accelerated downward movement. The findings suggest that microplastics in agricultural soils could potentially reach groundwater, posing risks to underground water quality.
Microplastics and microorganisms in sediments from stormwater drain system
Researchers measured microplastics in stormwater drain sediments across seasons and found that abundance peaked in winter (when rainfall is infrequent) and dropped in summer when runoff flushing was strongest, with polyethylene terephthalate being the dominant polymer type. The study also documented how microplastics influence the microbial communities in drain sediments, suggesting that stormwater infrastructure acts as both a sink and seasonal conduit for microplastic transport to larger water bodies.
Transport of plastic particles in natural porous media under freeze–thaw treatment: Effects of porous media property
Researchers tested how freeze-thaw cycling affects the transport of nanoplastics through columns of natural soils with different textures. Freeze-thaw treatment increased nanoplastic transport through quartz sand by smoothing grain surfaces but reduced transport through loamy and sandy natural soils by creating new retention sites, demonstrating that soil type determines how freeze-thaw affects plastic mobility.
The Effect of Polymer Type and Particle Concentration on Microplastic Transport Mechanisms in Saturated Porous Media
Scientists studied how tiny plastic particles move through soil and groundwater by testing different types of plastics at various concentrations. They found that the amount and type of plastic affects how far these particles travel underground, and that bacteria growing on the plastic surfaces can change how they move through soil. This research helps us better understand how microplastics might contaminate our drinking water sources and food supply.
Subsurface transport of microplastics in riverine sediment: Impacts of different rain events and particle density
Microplastics added to the surface of riverbed gravel columns gradually migrate deeper into the sediment as rain events accumulate, especially through repeated wet-dry cycles. Both polystyrene (denser than water) and polyethylene (less dense) particles traveled deeper over time, with smaller, less hydrophobic particles moving farthest. This shows that riverine sediment is not just a permanent sink for microplastics but can also funnel them downward into groundwater aquifers and subsurface habitats.
Transport and retention of polyethylene microplastics in saturated porous media: Effect of physicochemical properties
Researchers studied how polyethylene microplastics move through water-saturated sand and gravel, testing the effects of particle size, water chemistry, and flow speed. They found that smaller microplastics traveled farther through the porous material, while higher salt concentrations and lower flow rates increased particle retention. The findings help explain how microplastics may spread through groundwater systems under real-world conditions.
Exploring the vertical transport of microplastics in subsurface environments: Lab-scale experiments and field evidence
Researchers investigated how microplastics move downward through soil using laboratory column experiments and field sampling of groundwater. They found that heavier rainfall, smaller particle size, and fiber-shaped microplastics all increased vertical transport through unsaturated soil. Field samples confirmed the presence of microplastics in both soil layers and groundwater, suggesting that surface plastic pollution can migrate into underground water supplies.
Behaviour and transport of microplastics under saturated flow conditions in sediments and soils
Researchers investigated the behaviour and transport of microplastics under saturated flow conditions in sediments and soils, examining how particle properties influence movement through porous media. The study aimed to improve understanding of subsurface microplastic fate and transport relevant to both soil and groundwater contamination.
Transport and fate of microplastic particles in wastewater treatment plants
Researchers tracked microplastic particles through multiple stages of a wastewater treatment plant, finding that particles were concentrated in sludge but that a fraction passed through each treatment stage and remained in the final effluent.
Evaluating factors influencing microplastic mobility in sediments through visualization and experiments
Researchers used micro-CT imaging to visualize three-dimensional transport pathways of microplastics through gravel and sand sediments relevant to riverbank filtration, finding that smaller sediment pore sizes restrict microplastic mobility and that particle properties such as shape, size, and polymer density influence infiltration depth.
Evaluating factors influencing microplastic mobility in sediments through visualization and experiments
Researchers used micro-CT imaging to visualize three-dimensional transport pathways of microplastics through gravel and sand sediments relevant to riverbank filtration, finding that smaller sediment pore sizes restrict microplastic mobility and that particle properties such as shape, size, and polymer density influence infiltration depth.
One-Dimensional Experimental Investigation of Polyethylene Microplastic Transport in a Homogeneous Saturated Medium
Researchers conducted one-dimensional column experiments to characterize the transport of polyethylene microplastics through saturated homogeneous granular media, using fluorescent tracers and inverse modeling to calculate hydrodynamic transport parameters and identify media characteristics that influence microplastic mobility in groundwater.
Subsurface transport of microplastic particles in gravel columns: Impacts of different rain events and particle characteristics
Researchers conducted column experiments using 110 cm wet-packed fine gravel columns to examine subsurface transport of two microplastic types — polystyrene (denser than water) and polyethylene (less dense than water) at 50 µm median size — under different simulated rainfall scenarios including continuous rain, wet-dry cycles, and single events followed by drying. They found that particle density, rainfall pattern, and subsurface heterogeneity all influenced microplastic vertical transport and retention depth in gravel sediments.
Research on the Migration and Transformation Behavior of Microplastics in Groundwater Systems and Their Ecological Health Risks
Using column experiments, field monitoring, and adsorption studies, this research found that polyethylene microplastics smaller than 50 μm can penetrate clay barriers and migrate deep into groundwater systems, with particle size and aquifer porosity being the primary factors governing underground transport.
Microplastic polymer type impacts water infiltration and its own transport in soil
Researchers examined how different types of microplastics move through soil and affect water infiltration. They found that polypropylene, being more hydrophobic, impeded water flow more strongly than polyethylene terephthalate, while PET was more mobile in the soil column. The study suggests that a microplastic's surface properties and density play key roles in determining both how it travels through soil and how much it disrupts water movement.
Overlooked yet critical pathways for microplastics input to soil and groundwater system: Transport mechanisms and simulation predictions in landfill environments
Researchers systematically investigated how microplastics travel through landfill soils into groundwater, examining the effects of particle density, size, polymer type, temperature, and salinity on transport. The study used column experiments and computational modeling to reveal that landfill conditions create overlooked but critical pathways for microplastic contamination of soil and groundwater systems.
Laboratory Experiments on the Transport of Microplastic Particles in Gravel and Sand Sediments
Researchers used column experiments to study the transport and infiltration behavior of PET, POM, PMMA, and PS microplastic particles across a range of sizes and densities in gravel and sand sediments, employing a novel ice-embedding technique to introduce particles and measuring their depth distribution after three days of flow.