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Papers
61,005 resultsShowing papers similar to Particulate suspension coating of capillary tubes
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.
Experimental Confirmationof the Interception HistoryParadigm for Colloid (Micro and Nanoparticle) Transport in PorousMedia
Researchers experimentally confirmed the Interception History Paradigm for colloid transport in porous media, demonstrating that retention profiles for micro- and nanoplastics deviate from predictions of Colloid Filtration Theory under unfavorable surface interaction conditions. Their findings validate the role of interception history — prior contact events at grain surfaces — in explaining anomalous retention behavior of colloids including engineered nanomaterials and plastic particles.
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.
Film entrainment and microplastic particles retention during gas invasion in suspension-filled microchannels
Researchers used microfluidic microchannel experiments to investigate how microplastic particles are retained during gas invasion in suspension-filled channels, providing mechanistic insights into microplastic transport and entrapment behavior relevant to soil contamination and remediation.
Effects of Biofilms and Particle Physical Properties on the Rising and Settling Velocities of Microplastic Fibers and Sheets
Researchers investigated how biofilms and physical properties affect the rising and settling velocities of microplastic fibers and sheets, finding that biofouling significantly altered vertical transport dynamics depending on particle shape and size.
Important Role of Concave Surfaces in Deposition of Colloids under Favorable Conditions as Revealed by Microscale Visualization
Researchers found that concave surface features on sand, glass beads, and soil particles play a critical role in microplastic colloid deposition, with attachment efficiency increasing with flow velocity below a threshold value due to enhanced delivery to sheltered surface pockets.
Evaluation of Ceramic Membrane Filtration for Alternatives to Microplastics in Cosmetic Formulations Using FlowCam Analysis
Ceramic membrane crossflow filtration was evaluated for removing silica powder and cornstarch—common microplastic alternatives in cosmetics—with FlowCam particle analysis revealing high removal efficiency and insights into particle behavior that can guide greener cosmetic formulation strategies.
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.
AQuantitative Relationshipbetween Settling and Wettabilityfor Weathered Microplastics in Aquatic Systems
Researchers quantified the relationship between surface wettability and settling velocity for weathered microplastics in aquatic systems, demonstrating that wettability-driven microscale changes at the particle-water interface modify drag forces and thus govern the transport and fate of submillimeter plastic particles.
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.
Dispersion properties of nanoplastic spheres in granular media at low Reynolds numbers
Researchers measured how nanoplastic spheres of different sizes (100-1000 nm) move through porous granular media at low flow rates, finding that existing models significantly underestimate the dispersion of colloidal-sized nanoplastics. Size exclusion effects reduced the mobility of larger nanoplastics in fine-grained sediments, with implications for predicting nanoplastic transport in soils and groundwater.
Experimental Visualization and Modeling of the Transport Behaviors of Monofilament Microplastic Fibers Through an Idealized Porous Media
Video imaging of monofilament microplastic fibers passing through a flow cell packed with glass beads showed that longer fibers had more complex trajectories and greater lateral displacement than shorter fibers or passive tracers, improving understanding of fiber transport through porous media.
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.
Investigations into the effects of biofilm formation on the transport behavior of microplastics in open channel flows
Researchers found that biofilm growth on low-density polyethylene microplastics significantly increases their settling propensity in open-channel flow, with biofilm-colonized 100 µm PE particles showing greater vertical movement than uncoated polyester particles despite PE's lower inherent density.
Transport of nanoplastics in saturated iron oxide-coated gravel: Effects of flow velocity, ionic strength and surface property of nanoplastics
Researchers investigated nanoplastic transport through saturated iron oxide-coated gravel by varying flow velocity, ionic strength, and surface properties, finding that higher flow rates promoted nanoplastic transport, while ionic strength had opposing effects on negatively and positively charged particles depending on their surface chemistry.
Response of microplastic particles to turbulent flow: An experimental study
Using controlled flume experiments, researchers studied how turbulent flow conditions affect the transport and settling behavior of microplastic particles with varied shapes and densities, finding that turbulence intensity and particle morphology interacted to determine suspension and deposition patterns.
Microplastics/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.
Infiltration and Transport of PVC microplastic particles in saturated quartz sand columns
Researchers investigated the infiltration and transport behaviour of 125-200 micrometre PVC microplastic fragments through saturated quartz sand columns under varying flow rates, using morphological descriptors to characterise particle movement. The study aimed to understand how particle shape and flow conditions influence microplastic retention and breakthrough in subsurface porous media, relevant to groundwater contamination risk assessment.
Evaluation of microplastic particle transmission in a microfiltration process using fluorescence measurements: Effect of pore size and flux
Researchers evaluated how microplastic particles are transmitted through a microfluidic device under controlled flow conditions, finding that particle size, shape, and surface properties influenced transport and deposition rates. The results provide fundamental data for modeling microplastic behavior in small-scale water systems.
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.
Coupled CFD-DEM modelling to assess settlement velocity and drag coefficient of microplastics
Researchers used computational fluid dynamics coupled with particle simulations to model how the size, shape, and density of microplastics affect their settling velocity and drag in water. Accurate physical models of microplastic behavior are essential for predicting where particles accumulate in rivers, lakes, and the ocean.
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.