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61,005 resultsShowing papers similar to Studying the effect of moving sandy bedforms on the infiltration behavior of microplastic particles
ClearMicroplastic infiltration into mobile sediments
Researchers used an annular flume to simulate how microplastic particles infiltrate into sandy river sediments as bedforms migrate. They found that particle size was the most important factor determining how deep microplastics penetrated into the sediment, while bedform speed and particle density had less influence. The study reveals that smaller microplastics can be buried deeper in river sediments, making them harder to detect and potentially creating long-term contamination reservoirs.
Microplastic deposition in streams under moving bedforms
Researchers conducted flume experiments to examine microplastic deposition in sandy streambeds under moving bedform conditions, finding that bedform migration and particle size both control whether microplastics are buried or remain in suspension, with implications for estimating MP residence times in river systems.
Exploring the influence of sediment motion on microplastic deposition in streambeds
This study systematically explored how sediment motion affects microplastic deposition in streambeds made of fine sediments, finding that sediment transport dynamics play a critical role in controlling where microplastics accumulate. The results improve understanding of microplastic fate in riverine systems.
How hyporheic pumping and bedform migration redistribute microplastic burial in sand-bed rivers
Scientists studied how tiny plastic particles (microplastics) get trapped in riverbeds and found that moving sand dunes don't just increase or decrease plastic burial—they actually shift where the plastics end up stored. The research shows that plastic particles can get buried in shallow or deeper layers of river sediment depending on how the sand moves, which affects how long these pollutants stay in the environment. This matters because understanding where microplastics accumulate in rivers helps us better predict their impact on water quality and the health of ecosystems that people depend on.
Understanding how sediment movement affects microplastic deposition in sandy streambeds: A modeling study.
Researchers used a numerical model of flow and particle transport in moving streambed sediment to quantify how streambed motion affects microplastic deposition and accumulation, running simulations across streamwater velocities of 0.1-0.5 m/s and varying median grain sizes to examine MPs of all sizes and densities.
Assessing the Behavior of Microplastics in Fluvial Systems: Infiltration and Retention Dynamics in Streambed Sediments
Scientists used laboratory river-bed simulations to study how microplastics move from surface water down into streambed sediments. Smaller particles (1 micrometer) penetrated deeper into the sediment than larger ones, and higher water flow pushed more particles downward. This research helps explain how microplastics accumulate in river beds, which serve as both drinking water sources and habitats for aquatic organisms.
The effects of streambed movement and particle size on microplastic deposition
Researchers conducted flume experiments using polypropylene fibers and polystyrene microspheres in sandy streambeds to examine how streambed motion and particle size influence microplastic deposition, finding that both factors significantly affect burial rates in riverine systems.
The effects of stream water velocity, streambed celerity, and particle properties on microplastic deposition in streams
Researchers conducted laboratory flume experiments to examine how stream water velocity, bedform movement, and microplastic particle properties (material type PET/PP/PA and fiber length 25-200 µm) influence the deposition dynamics of microplastics in sandy streambeds, finding that bedform movement and particle characteristics significantly affected deposition rates and sediment distribution patterns.
Sand bed river dynamics controlling microplastic flux
Researchers used controlled flume experiments to show that sand bed rivers can retain up to 40% of their microplastic load within the sediment, making them significant sinks for plastic pollution. They found that bedform dynamics, particularly the speed at which sand dunes move, can predict microplastic flux through the system. The study also revealed that microplastic shape plays a more important role than previously recognized in determining whether particles are trapped or transported downstream.
Microplastic trapping in sandy bedload: insights from flume experiments
Researchers conducted flume experiments using a 4-metre channel to investigate how microplastic particles become trapped within sandy bedload ripples formed by unidirectional water flows, examining interactions between microplastics and inorganic sediment particles under controlled depositional conditions. The findings provide mechanistic insights into how microplastics are temporarily stored in riverine sediments during their transfer from land to ocean.
Investigations on microplastic infiltration within natural riverbed sediments
Researchers used laboratory flume experiments to investigate how sediment grain size affects the infiltration of four types of microplastics (PET spheres, PET ellipsoids, polystyrene fragments, and polyamide fibers) into riverbed sediments. Sediment particle size, microplastic shape, and density were key factors controlling how deeply microplastics penetrate into the hyporheic zone.
Microplastic trapping in sandy bedload: insights from flume experiments
Researchers conducted flume experiments to investigate the mechanisms controlling microplastic trapping in sandy bedload sediments, examining how particles of different sizes and densities become buried within ripple structures formed by unidirectional tractional flows. The study provided insights into riverine microplastic sedimentation dynamics relevant to understanding transient storage during land-to-ocean transport.
Bedforms effect on microplastics deposits erosion
Researchers conducted flume experiments to study how a sand bedform influences the erosion of compact polyamide microplastic deposits, finding that a sudden increase in flow rate forced erosion of microplastics accumulated at the lee side of a dune, shedding light on water-bed interface dynamics relevant to river ecology.
Plastic pollution in riverbeds fundamentally affects natural sand transport processes
Researchers used laboratory flume experiments to show that plastic particles mixed into sandy riverbeds — even at low concentrations — disrupt the normal formation of ripples and dunes, causing irregular erosion patterns and pushing more sand into suspension in the water column. This means plastic pollution is not a passive bystander in river systems but actively alters the physical processes that shape river channels and transport sediment downstream.
Effects of microplastics on sedimentary geochemical properties and microbial ecosystems combined with hydraulic disturbance
Researchers investigated how microplastics interact with river sediments under flowing water conditions versus still water. They found that water movement significantly amplified the effects of microplastics on sediment structure, organic matter, and enzyme activity compared to static conditions. The study reveals that the environmental impact of microplastics in rivers is more complex and potentially greater than laboratory experiments under calm conditions would suggest.
Study of the influence of fluvial dynamics on the distribution and transport of microplastics.
Researchers studied how fluvial dynamics, including water flow, turbulence, and river morphology, influence microplastic distribution and transport in a river system. The study found that hydrological conditions strongly control where microplastics deposit and how they move through the watershed.
Microplastic and natural sediment in bed load saltation: Material does not dictate the fate
Researchers investigated how microplastics move as bed load in river flows and found that transport behavior in saltation was governed primarily by particle size, shape, and density rather than material composition, suggesting that microplastics follow similar transport mechanics as natural sediment.
Making waves: Unraveling microplastic deposition in rivers through the lens of sedimentary processes
Researchers examined how sedimentary processes in rivers control where microplastics are deposited and how long they remain buried. They reviewed existing work on water-sediment exchange of microplastic particles and identified key gaps in understanding deposition dynamics. The study highlights that rivers serve as major pathways for transporting microplastics from land to oceans, and that sediment processes play a critical role in determining their fate.
The role of pumping and turnover in controlling microplastics entrapment and release in sand-bed rivers
Researchers developed a mathematical framework to model how microplastics are trapped and released in sand-bed rivers through the combined effects of water flow and dune migration. The study found that dune movement substantially alters how microplastics are transported and buried in river sediments, with a nonlinear interplay between shallow rapid exchange and deep burial that depends on dune size and flow conditions.
Hydro-geomorphological features govern the distribution, storage, and transport processes of riverbed microplastics
This study examined how river channel shape, water flow, and sediment dynamics control where microplastics accumulate, travel, and are stored in riverbeds. Identifying these hydro-geomorphological drivers is important for predicting microplastic transport to downstream ecosystems and the ocean.
Hydro-geomorphological features govern the distribution, storage, and transport processes of riverbed microplastics
This study examined how river channel shape, water flow, and sediment dynamics control where microplastics accumulate, travel, and are stored in riverbeds. Identifying these hydro-geomorphological drivers is important for predicting microplastic transport to downstream ecosystems and the ocean.
Modeling microplastic deposition in sandy streams with moving bedforms
Researchers developed a coupled model combining improved mechanistic colloid attachment predictions with a bedform transport model to quantify microplastic deposition in sandy streams with moving dune bedforms, running numerical simulations to assess how streambed characteristics, flow conditions, and particle properties interact to control microplastic retention. The model addressed the poor predictive power of classical colloid filtration theory for microplastics by incorporating bedform dynamics into deposition calculations.
The transport behaviour of microplastics in longitudinal mixing and hyporheic exchange under varied flow conditions
Researchers studied how microplastics move through river systems, examining both downstream transport and how particles interact with riverbeds through hyporheic exchange. Understanding these transport behaviors helps predict where microplastics accumulate in river sediments.
Modelling the Fate of Microplastics in river bed sediments.
Researchers modeled microplastic transport, deposition, and burial in river bed sediments under varying hydrological conditions. River bed sediments were found to act as long-term reservoirs for microplastics, with periodic high-flow events temporarily resuspending and redistributing particles.