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61,005 resultsShowing papers similar to Tracking the transport of europium-labeled polystyrene nanoplastics in natural soils: Insights from leaching tests under varied environmental condition
ClearTransport 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.
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.
Migration of Nanoplastic in Soil: Effects of Polymer Properties and Rainfall Conditions
Researchers investigated the vertical migration of nanoplastics in soil under simulated rainfall, examining how polymer type, concentration, aging, rainfall duration, and pH affect transport behavior. Rainfall promoted nanoplastic entry and retention in upper soil layers, with long-term rainfall driving gradual migration to deeper layers, and nanoplastic mobility found to be inversely related to particle concentration.
Influence mechanism of attapulgite on the migration of carboxylated polystyrene nanoplastics and the role of environmental factors
Researchers found that attapulgite clay mineral significantly influenced the migration of carboxylated polystyrene nanoplastics in saturated porous media, with humic acid and oxalic acid playing differential roles in either facilitating or retarding nanoplastic transport through soil-groundwater systems.
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.
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.
Quantification of two-site kinetic transport parameters of polystyrene nanoplastics in porous media
This laboratory study tracked how polystyrene nanoplastics move through different soil types by measuring their transport through columns packed with quartz sand and clay minerals. Higher pH conditions reduced the ability of clay minerals to trap nanoplastics, meaning they traveled farther and faster through soil toward groundwater. Understanding these transport dynamics is key to predicting how nanoplastic contamination spreads through soils and ultimately reaches drinking water sources.
Nanoplastic stimulates metalloid leaching from historically contaminated soil via indirect displacement
Researchers found that negatively charged polystyrene nanoplastics unexpectedly enhanced arsenic leaching from historically contaminated soil by displacing arsenic from soil binding sites rather than through direct adsorption, challenging assumptions about nanoplastic contaminant co-transport.
Use of metal-tagged environmentally representative micro- and nanoplastic particles to investigate transport and retention through porous media using single particle ICP-MS
Metal-tagged micro- and nanoplastic particles were used with single-particle ICP-MS to study transport and retention of plastic particles through saturated porous media, providing a sensitive method for tracking environmentally representative particles in soil.
Effects of physicochemical factors on transport and retention of polystyrene microplastics (PS-MPs) in homogeneous and heterogeneous saturated porous media
Researchers studied how polystyrene microplastics move through different types of underground soil and sand formations. They found that smaller sand grains, higher salt concentrations, and the presence of calcium ions all increased microplastic retention, while mixed soil layers created preferential flow paths that allowed some particles to break through faster. The findings help explain how microplastics could potentially contaminate groundwater aquifers.
Polystyrene Nanoplastics-Enhanced Contaminant Transport: Role of Irreversible Adsorption in Glassy Polymeric Domain
Polystyrene nanoplastics were shown to enhance the transport of co-occurring contaminants through soil by irreversibly adsorbing them onto the glassy polymer domain, facilitating their spread in the environment. The findings indicate that nanoplastics in soil can act as mobile carriers for contaminants that would otherwise remain bound to soil particles, potentially increasing leaching into groundwater.
Nanoplastic Particle Mobility in Agricultural Soils: A Risk for Groundwater Contamination Amplified by Changing Rainfall Patterns
Researchers used an innovative gold-core nanoplastic tracer method in a lysimeter setup to determine that 92 nm nanoplastic particles can migrate through agricultural soils and reach groundwater systems, with counterintuitively higher mobility found in fine-grained clayey soils than in coarse sandy soils. The study identifies changing rainfall patterns as an amplifying factor for nanoplastic groundwater contamination risk.
Investigating transport kinetics of polystyrene nanoplastics in saturated porous media
Researchers investigated how ionic strength, pH, and organic matter influence the transport of polystyrene nanoplastics through saturated porous media using column experiments and DLVO modeling, finding that increasing sodium ion concentrations promote nanoplastic aggregation and reduce mobility in soil and groundwater systems.
A meta-analysis of nanomaterial and nanoplastic fate in small column experiments and implications for fate in soils
This meta-analysis pools data from column experiments to understand how nanoplastics behave and move through soil. The findings help predict where nanoplastics end up in the ground, which matters for human health because these particles can leach into groundwater or be taken up by crops growing in contaminated soil.
Effect of nanoplastics on the transport of platinum-based pharmaceuticals in water-saturated natural soil and their effect on a soil microbial community
Researchers investigated how polystyrene nanoplastics affect the transport of three platinum-based anticancer drugs through water-saturated natural soil and found that nanoplastic surface functionalization altered drug mobility and affected the soil microbial community.
Impact of fertilizers on polyethylene terephthalate nanoplastics migration in groundwater: A combined experimental and simulation approach
Researchers investigated how three fertilizer components — urea, calcium phosphate, and sodium sulfate — individually and in combination affect the migration behaviour of polyethylene terephthalate (PET) nanoplastics through quartz sand porous media, using column experiments combined with simulation modelling. The study found that fertilizer composition significantly altered nanoplastic transport, with ionic strength and specific ion effects modulating particle mobility in groundwater systems.
Nano(micro)plastic mobility in soil: Metallic additives and Sr isotopes as potential tracers
Researchers found a strong correlation between microplastic distribution and elevated metal concentrations in a soil amended with compost containing plastic debris, suggesting that metallic additives in plastics migrate into soil alongside the particles. Strontium isotopes were proposed as tracers to track nano- and microplastic mobility in soil.
Secondary nanoplastic transport in sand and in soil
Scientists studied how tiny plastic particles called nanoplastics move through sand and soil after being broken down in the environment for many years. They found that different types of plastic particles move differently underground - some get stuck while others travel further - depending on the plastic type and soil conditions. This research helps us better understand how these microscopic plastic pieces might spread through groundwater and potentially reach drinking water sources, which could affect human health.
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 Mechanisms of Nanoplastics in Agricultural Soils Under Snowmelt Infiltration Conditions in Cold Regions
Researchers investigated how nanoplastics migrate with snowmelt water through three agricultural soil types (luvisol, chernozem, and albic soil) under freeze-thaw conditions, finding that chernozem showed peak nanoplastic concentrations of 25.62 mg/kg in the vertical profile and that biochar amendment modified nanoplastic transport behavior across all soil types.
[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.
Impact of nanoplastic debris on the stability and transport of metal oxide nanoparticles: role of varying soil solution chemistry
Researchers investigated how nanoplastic debris affects the stability and transport of copper oxide nanoparticles in soil solutions extracted from three soil types, finding that nanoplastic presence significantly reduced nanoparticle aggregation and sedimentation rates and dramatically increased nanoparticle mobility through soil columns, raising concerns about combined contamination enhancing metal nanoparticle spread in terrestrial environments.
Influence of polymer age and soil aggregation on microplastic transport in soil erosion events
Researchers compared the transport rates of pristine and aged polystyrene microplastics during simulated rainfall events and quantified their incorporation into soil aggregates across multiple wet-dry cycles, providing the first empirical data on how surface roughness and hydrophobicity changes from weathering affect MP mobility in soil erosion.
Aging Significantly Affects Mobility and Contaminant-Mobilizing Ability of Nanoplastics in Saturated Loamy Sand
Researchers studied how aging from UV light and ozone exposure affects the mobility of nanoplastics in soil and found that aged particles traveled much farther through the soil column than pristine ones. The aged nanoplastics also carried more chemical contaminants with them as they moved. The findings suggest that weathered nanoplastics in the environment may pose greater risks for groundwater contamination than previously assumed.