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Papers
20 resultsShowing papers similar to Experimental Confirmationof the Interception HistoryParadigm for Colloid (Micro and Nanoparticle) Transport in PorousMedia
ClearExperimental 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.
Retention and transport behavior of microplastic particles in water-saturated porous media
Researchers investigated microplastic transport in water-saturated porous media using polystyrene microspheres, finding that particle size primarily determined retention behavior, with 50 nm particles showing high mobility while 500 nm particles exhibited greater attachment and slower migration.
Mechanism comparisons of transport-deposition-reentrainment between microplastics and natural mineral particles in porous media: A theoretical and experimental study
Researchers compared the transport, deposition, and re-entrainment behavior of microplastic particles versus natural mineral particles in porous media, finding key differences driven by density, surface charge, and shape that affect how microplastics migrate through soils and sediments.
Effects of clay minerals on the transport of nanoplastics through water-saturated porous media
Column experiments with clay-containing saturated porous media showed that clay minerals reduced nanoplastic transport by enhancing particle retention through bridging flocculation and charge neutralization, with kaolinite having greater retention effects than montmorillonite, informing predictions of nanoplastic mobility in clay-rich soils.
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.
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.
Effect of deposition, detachment and aggregation processes on nanoparticle transport in porous media using Monte Carlo simulations
Researchers developed a 3D computational model to study how engineered nanoparticles move through porous soil and sediment, accounting for deposition, detachment, and aggregation. Similar models can be applied to understand how nanoplastics and small microplastics move through groundwater systems.
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.
Understanding the structure, distribution, and retention of nanoplastics in montmorillonite nanopore by multi-scale computational simulations
Researchers investigated the structure, distribution, and retention mechanisms of nanoplastics in montane stream sediments, finding that nanoplastic particles preferentially accumulated in fine-grained sediment fractions and that organic matter coating enhanced retention.
Transport and Retention of Unstable Nanoparticle Suspensions in Porous Media: Effects of Salinity and Hydrophobicity Observed in Microfluidic Pore Networks
Scientists studied how tiny plastic particles move through soil and rock underground, which helps us understand what happens to microplastics in our environment. They found that salty water and oily surfaces cause these particles to clump together and get permanently stuck in the ground, which could affect how microplastics spread through groundwater. This research helps us better predict where microplastics might end up and how to design systems to trap them before they reach our drinking water sources.
Mechanisms of increased small nanoplastic particle retention in water-saturated sand media with montmorillonite and diatomite: Particle sizes, water components, and modelling
Researchers compared how clay minerals (diatomite and montmorillonite) affect the transport of 20 nm and 80 nm polystyrene nanoplastics through water-saturated sand columns, finding that very small nanoplastics (20 nm) can enter diatomite's porous lattice structure, enhancing their retention, while montmorillonite more broadly inhibited transport of both sizes.
Transport and clogging of microplastic particles in porous media: Microscale experiments and statistical analysis
This study used microscale experiments to observe how microplastic particles move through and clog porous materials like sand and gravel, which are commonly used in water filtration systems. The researchers found that the size of microplastic particles relative to the pore openings is the main factor determining whether clogging occurs. These findings matter because they help predict how microplastics travel through soil and water filters, affecting whether they reach drinking water sources.
Transport of Microplastic Particles in Saturated Porous Media
Researchers investigated the retention and transport of polystyrene latex colloids as model microplastics in glass bead-packed columns under varying ionic strengths and injected volumes, finding that retention profiles shifted from monotonic to non-monotonic distributions as conditions changed. The study identifies limitations in conventional convection-diffusion models for predicting non-monotonic retention and provides data critical for improving microplastic fate models in porous media like soil.
Transport and accumulation of plastic particles on the varying sediment bed cover: Open-channel flow experiment
Researchers conducted open-channel flow experiments to study how various plastic particles of differing shape, size, density, and flexibility are transported and retained across sediment beds of varying grain size, finding that friction-driven retention zones consistently form at boundaries between finer and coarser sediments, offering a mechanism to explain the patchy distribution of microplastics in seafloor sediments.
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%.
A pore-scale investigation of microplastics migration and deposition during unsaturated flow in porous media
Researchers used microfluidic experiments to investigate microplastic migration and deposition during unsaturated flow in porous media, identifying multiple deposition patterns influenced by flow rate, particle size, volume fraction, and pore geometry.
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.
Pore-Scale Insightsinto Microplastic Fiber Transportand Retention in Porous Media
Researchers investigated pore-scale transport and retention of polypropylene microfibers (20-150 micrometers) in a microfluidic porous media cell, demonstrating that fiber size and flexibility are the primary determinants of mobility versus entrapment. The findings reveal how agricultural soils act as sinks for microplastic fibers and how fiber trapping alters flow dynamics at the pore scale.
A two-way coupled model for the co-transport of two different colloids in porous media
Researchers developed a two-way coupled mathematical model for co-transport of two different colloids (e.g., nanoplastics and bacteria) through porous media, accounting for mutual interactions and heteroaggregation, and showed it outperforms the conventional one-way coupling assumption across multiple experimental datasets.
Transport of different microplastics in porous media: Effect of the adhesion of surfactants on microplastics
Researchers investigated how surfactant adhesion on different microplastic surfaces affects their transport through porous media, finding that surfactant interactions vary with microplastic type and significantly alter their mobility in subsurface environments.