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Papers
20 resultsShowing papers similar to Effects of physicochemical factors on transport and retention of polystyrene microplastics (PS-MPs) in homogeneous and heterogeneous saturated porous media
ClearTransport 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.
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.
Transport of polypropylene, polyvinyl chloride, polyethylene terephthalate and polymethyl methacrylate microplastics in porous media under gradient ionic strength
Researchers used column experiments to study how four types of microplastics — polypropylene, PVC, PET, and PMMA — move through soil-like porous media under different salt concentrations. They found that increasing salinity reduces microplastic mobility by causing particles to stick to sand surfaces, which has implications for predicting how far microplastics can travel through soils to reach groundwater.
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.
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.
Effects of pore water flow rate on microplastics transport in saturated porous media: Spatial distribution analysis
Researchers studied how water flow rate affects the transport and retention of polystyrene microplastics in saturated porous media using a two-dimensional flow cell. They found that higher flow rates reduced overall particle retention but created more clustered distribution patterns in the pore spaces. The study provides important insights into how microplastics migrate through soil and groundwater systems, which has implications for understanding subsurface contamination.
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.
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.
Vertical transport of polystyrene nanoplastics in natural soils under unsaturated conditions: influence of particle size and texture
Laboratory experiments showed that polystyrene nanoplastics can travel downward through unsaturated soils, but larger particles and clay-rich soils retain them more effectively than smaller particles in sandy soils. Understanding how nanoplastics move through soil is important for predicting whether they will reach groundwater and contaminate drinking water sources.
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.
Effects of polystyrene fragments on the transport of Pb2+ in saturated porous media: The role of microplastics characteristics and flow velocity
Researchers studied how polystyrene microplastic fragments affect the movement of lead through saturated porous media like soil and groundwater systems. They found that microplastics generally promoted lead mobility, with the effect increasing as particle size, dosage, and flow velocity increased. The enhanced lead transport was attributed to microplastics reducing the ability of surrounding media to absorb the metal and altering pore structure, raising concerns about co-contamination risks in groundwater.
[Transport and Model Calculation of Microplastics Under the Influence of Ionic Type, Strength, and Iron Oxide].
Laboratory column experiments showed that calcium ions strongly inhibit the transport of polystyrene microplastics through quartz sand via bridging and charge neutralization effects, while iron oxide coatings on sand grains further reduce microplastic mobility through surface adsorption. Understanding these transport dynamics is important for predicting how microplastics move through soil and groundwater systems and assessing contamination risks to drinking water sources.
Co-impacts of cation type and humic acid on migration of polystyrene microplastics in saturated porous media
Researchers investigated how different cation types and humic acid concentrations affect the movement of polystyrene microplastics through saturated soil. The study found that aging accelerated microplastic migration under all conditions, while calcium ions and humic acid had complex interactive effects on microplastic transport and retention in porous media.
Transport of polystyrene nanoplastics in natural soils: Effect of soil properties, ionic strength and cation type
Researchers used column experiments across three soil types to show that polystyrene nanoplastic transport is governed by soil iron and aluminum oxide content and pH — with high-pH, low-oxide soils allowing up to 97% nanoplastic passage — and that calcium ions and higher ionic strength significantly increase retention, revealing that soil chemistry strongly controls nanoplastic mobility toward groundwater.
Transport behavior of microplastics in soil‒water environments and its dependence on soil components
Researchers studied how polystyrene microplastics move through columns packed with different soil components and found that soil organic matter allowed the highest transport efficiency, with over 90 percent of particles passing through. Electrostatic repulsion between the negatively charged microplastics and soil particles was a key factor driving migration. The results suggest that soil composition plays a major role in determining how far microplastics can travel underground toward water sources.
Mechanism of coupled phosphate‑calcium modulation of nanoplastic transport in porous media: Role of solution chemistry and surface interactions
Scientists used laboratory experiments and molecular simulations to study how phosphate and calcium ions in soil water affect whether polystyrene nanoplastics move freely through the ground or get trapped in soil particles. They found that pH was a key factor: at lower pH levels, phosphate helped nanoplastics travel farther while calcium restricted movement, with both effects linked to how these ions change the surface charge of both the particles and the soil. Understanding nanoplastic mobility in soil is essential for predicting contamination of groundwater and crops.
Effect of particle size on the transport of polystyrene micro- and nanoplastic particles through quartz sand under unsaturated conditions
This study tested how different sizes of polystyrene micro and nanoplastics move through sand under conditions similar to soil with some moisture. Smaller particles (120 nanometers) passed through easily with 95% recovery, while larger particles (10,000 nanometers) were completely trapped. The findings suggest that the tiniest nanoplastics can readily travel through soil to reach groundwater, creating a potential pathway for plastic contamination of drinking water sources.
Experimental and mathematical investigation of cotransport of clay and microplastics in saturated porous media
This study investigated how microplastics travel through underground soil and sand, finding that clay particles in the soil can actually help microplastics move farther by changing how they interact with soil surfaces. The research developed a mathematical model to predict this movement. Understanding how microplastics travel through soil is important because it affects whether they reach and contaminate groundwater used for drinking.
Binary transport of PS and PET microplastics in saturated quartz sand: Effect of sand particle size and PET shape
Not all microplastics behave the same way when they enter groundwater or soil — their shape, size, and the plastic type all influence how far they travel. This study tracked how spherical and fragment-shaped microplastics of two polymer types (polystyrene and PET) moved through sand columns, finding that fragment-shaped particles were significantly less mobile than spheres, and that when both types were present together, the spheres helped carry fragments further by forming aggregates. These findings are important for predicting how microplastics contaminate groundwater and for designing remediation strategies.
How soil moisture and flow regime drive microplastic transport in the vadose zone: insight from modelling and column experiments
Scientists studied how tiny plastic particles move through soil toward underground water sources that we use for drinking water. They found that plastic particles travel very differently depending on how wet or dry the soil is - sometimes getting trapped, other times moving quickly through the ground. This research helps us better understand how microplastics might contaminate our groundwater supplies, which is important for protecting drinking water quality.