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Papers
20 resultsShowing papers similar to Mechanism comparisons of transport-deposition-reentrainment between microplastics and natural mineral particles in porous media: A theoretical and experimental study
ClearMicroplastics/nanoplastics in porous media: Key factors controlling their transport and retention behaviors
This review examines what controls how microplastics and nanoplastics move through soil and other porous materials like sand and sediment. Factors like particle size, shape, surface charge, water flow speed, and the presence of other pollutants all influence whether plastics stay in place or travel deeper into groundwater. Understanding these transport behaviors is important for assessing the risk of microplastics contaminating underground drinking water sources.
The individual transport, cotransport and immobilization with solar pyrolysis biochar of microplastics and plasticizer in sandy soil
Researchers tracked the individual transport, co-transport, and immobilization of microplastics in porous media, finding that plastic particle behavior differs significantly depending on surface charge and pore structure interactions. The results improve predictions of where microplastics migrate and accumulate in soils and aquifers.
Effect of particle density on microplastics transport in artificial and natural porous media
Researchers studied how the density of microplastic particles affects their movement through soil and sediment in laboratory column experiments. They found that lighter, less dense microplastics traveled farther and were retained less in the soil compared to denser particles, and that natural sediments captured more microplastics than uniform glass beads. The findings help explain how different types of microplastics spread through groundwater and soil environments at different rates.
Key factors controlling transport of micro- and nanoplastic in porous media and its effect on coexisting pollutants
Researchers reviewed the key factors that control how micro- and nanoplastics move through porous media such as soil and sediment, and how they affect the transport of co-occurring pollutants. They found that microplastics can either facilitate or inhibit the movement of other contaminants depending on particle properties and environmental conditions. The review emphasizes the need to better understand these co-transport dynamics for predicting the environmental fate of plastic pollution.
Transport and deposition of microplastic particles in saturated porous media: Co-effects of clay particles and natural organic matter
Researchers performed column experiments to study how clay particles and natural organic matter affect microplastic transport through saturated porous media, finding that both colloids reduced MP mobility through heteroaggregation and that their combined presence produced the greatest reduction in transport.
Micro- and nanoplastics retention in porous media exhibits different dependence on grain surface roughness and clay coating with particle size
Researchers found that grain surface roughness and clay coatings affect the retention of microplastics and nanoplastics in porous media differently depending on particle size, with nanoplastics behaving oppositely to microplastics in certain soil conditions — complicating predictions of plastic transport in groundwater systems.
Preliminary investigation on effects of size, polymer type, and surface behaviour on the vertical mobility of microplastics in a porous media
Laboratory sand column experiments investigated how microplastic size, polymer type, and surface chemistry influence retention and transport behavior in subsurface environments. Results showed that smaller particles and those with surface modifications traveled farther, informing predictions of microplastic migration in soils and groundwater.
Flume experiments on transport and deposition behavior of microplastics in sediment bed environments
Researchers ran 42 flume experiments with three model sediments and spherical microplastics of varying size and density, finding that deposition depth is governed by sediment porosity and the grain-to-particle diameter ratio, while transport is primarily controlled by particle density and initial placement, providing data to improve MP mass balance models.
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.
Experimental Confirmation of the Interception History Paradigm for Colloid (Micro and Nanoparticle) Transport in Porous Media
Laboratory experiments confirmed the interception history paradigm for colloid filtration under chemically unfavorable conditions, demonstrating that microplastics and other colloidal particles follow predictable deposition patterns in porous media—providing mechanistic data relevant to modeling MP transport through soils and aquifers.
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%.
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.
Transport and retention mechanism of microplastics in saturated porous media: Dominance of layer sequence and modulation by solution chemistry
Researchers found that the layered sequence of sand structures in saturated porous media dominates microplastic transport and retention patterns, with coarse-to-fine layering trapping more particles than fine-to-coarse sequences, and solution chemistry further modulating these physical effects.
Modeling microplastic transport through porous media: Challenges arising from dynamic transport behavior
This perspective article examines the challenges of modeling how microplastics move through soil and groundwater systems, noting that existing transport models designed for other particles fall short. Microplastic properties change dynamically as they interact with their environment, altering their density, surface chemistry, and movement behavior in ways that are difficult to predict. The study argues that new modeling approaches, potentially using data-driven methods, are needed to accurately predict microplastic transport at meaningful environmental scales.
Effects of co-present mineral colloids on the transport of microplastics in porous media: The key role of hydrochemical and hydrodynamic conditions
Scientists studied how tiny plastic particles (microplastics) move through soil and sand when mixed with natural clay particles. They found that the combination of different clay types and water conditions can either help microplastics travel further underground or trap them in place. This research helps us better understand how microplastics might contaminate groundwater sources that provide our drinking water.
Microplastic and natural sediment in bed load saltation: material does not dictate the fate
This study compared the transport of microplastics and natural sediment in river flows and found that despite similar particle sizes, microplastics behave differently due to their lower density and different surface properties. The findings suggest that microplastic transport cannot be fully predicted using models designed for natural sediment. Better transport models are needed to understand how microplastics move through river systems to the ocean.
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.
Particulate flow in porous media: experimental study and numerical modelling of microplastic transport in geomaterials
This study combined laboratory experiments and numerical modeling to examine how microplastic particles migrate through porous geomaterials, finding that transport behavior is similar to fine soil particles moving through hydrogeological environments. The results have implications for predicting microplastic contamination of groundwater.
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.
Size/shape-dependent migration of microplastics in agricultural soil under simulative and natural rainfall
Researchers found that microplastic migration in agricultural soil under rainfall depends on particle size and shape, with smaller particles moving deeper and rainfall intensity significantly influencing vertical transport patterns in soil profiles.