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61,005 resultsShowing papers similar to Cation–π Interaction and Salinity Regulate the Bubble-Mediated Transport of Microplastics in the Presence of Aromatic Dissolved Organic Matter
ClearHow microplastics crosses the buoyancy barrier
Researchers used Colloidal Probe atomic force microscopy (AFM) to study how the natural organic matter eco-corona on microplastic surfaces affects particle aggregation and buoyancy-relevant surface interactions, investigating the mechanisms by which microplastics cross the buoyancy barrier between water column and air.
Effects of organic matter on interaction forces between polystyrene microplastics: An experimental study
Researchers examined how organic matter in seawater affects the aggregation and adhesion forces between polystyrene microplastics, finding that organic coatings alter surface interaction forces in ways that influence whether microplastics clump together and sink or remain dispersed in the water column.
Nanoscale interaction mechanism between bubbles and microplastics under the influence of natural organic matter in simulated marine environment
Researchers used atomic force microscopy to measure the nanoscale interactions between air bubbles and different types of microplastics in simulated seawater. They found that hydrophobic plastics like polystyrene and PVC showed stronger bubble attachment than hydrophilic ones, and that humic acid in the water significantly weakened these interactions. The study suggests that natural organic matter in oceans may reduce the tendency of microplastics to be carried to the surface by bubbles, affecting how they circulate in marine environments.
Wettability of microplastic particles affects their water-to-air ejection via bubble bursting.
Researchers experimentally investigated how the wettability (hydrophilicity or hydrophobicity) of microplastic particles affects their enrichment into jet droplets ejected when bubbles burst at the ocean surface, providing new insight into the mechanisms by which microplastics are transferred across the air-sea interface and potentially aerosolized.
Molecular level insight into the different interaction intensity between microplastics and aromatic hydrocarbon in pure water and seawater
Researchers found that microplastics have stronger affinity for aromatic hydrocarbons in seawater than in pure water, with molecular dynamics simulations and density functional theory revealing that salinity-induced changes in surface characteristics and ionic interactions drive enhanced pollutant sorption.
Effect of wettability on microplastic aerosolization via film and jet drops ejected from bursting bubbles
Researchers experimentally investigated how wettability of microplastic particles affects their aerosolization via film drops and jet drops ejected from bursting bubbles at the ocean surface. They found that particle wettability significantly controls the probability of microplastic inclusion in ejected droplets, with implications for understanding how microplastics transfer from the ocean surface into the atmosphere.
Understanding microplastic flotation through microbubble-microplastic interactions
Researchers studied how microbubbles attach to polyethylene and polystyrene microplastics across a range of salt concentrations to understand flotation-based removal. Polyethylene showed consistently higher bubble attachment than polystyrene due to stronger hydrophobic interactions, and adhesion force analysis confirmed PE's greater tendency for bubble-mediated flotation.
Nanoscale insight into the interaction mechanism underlying the transport of microplastics by bubbles in aqueous environment
Nanoscale experiments revealed that bubble capture of microplastics in water is governed by hydrophobic interactions and surface charge complementarity between bubbles and MP particles. Understanding these mechanisms is critical for modeling the role of bubbles in transporting MPs from water to air-water interfaces and across environmental compartments.
How microplastics crosses the buoyancy barrier
Researchers used Colloidal Probe-AFM to study nanoscale interactions between eco-corona-coated microplastic particles and surfaces under varying ionic conditions, finding that natural organic matter coatings substantially alter surface properties and aggregation behavior in ways that can allow buoyant plastics to sink.
Transport of eco-corona coated nanoplastics in coastal sediments
Researchers investigated how different surface properties and eco-corona coatings affect the transport of polystyrene nanoplastics through coastal marine sediments. They found that negatively charged particles moved more easily through sediment than positively charged ones, while strong aggregation essentially immobilized unmodified particles. The formation of natural organic coatings on nanoplastics had opposing effects depending on surface charge, sometimes enhancing and sometimes inhibiting transport.
How Microplastics cross the Buoyancy Barrier: A multi-scale Study
Researchers investigated how microplastics less dense than water overcome the buoyancy barrier to settle in sediments, using colloidal probe atomic force microscopy, microscale aggregation tests, sedimentation column experiments, and simulations to quantify eco-corona-mediated MP-sediment attraction across scales. They found that eco-corona coatings created attractive forces enabling heteroaggregation with suspended sediment, doubling MP settling frequency in bentonite suspensions and increasing sediment retention by 32%, with environmental shear forces too weak to disrupt the formed aggregates.
Perspective into bio-fouled microplastic behaviour, transportation and characterization in water bodies
This review examines how biofouling alters the physicochemical properties of microplastics — including density, surface charge, hydrophobicity, and roughness — and how the resulting 'plastisphere' biofilm community reshapes microplastic transport dynamics, vertical flux, and long-term fate in aquatic systems.
How Microplastics Cross the Buoyancy Barrier
Researchers used Colloidal Probe-AFM to study nanoscale interactions between eco-corona-coated microplastic particles and model sand particles at varying ionic concentrations, finding that natural organic matter comprising the eco-corona can facilitate MP-sand adhesion, offering a mechanistic explanation for how buoyant microplastics cross the buoyancy barrier to sink.
Insight into interactions of polystyrene microplastics with different types and compositions of dissolved organic matter
Researchers investigated how polystyrene microplastics interact with different types of dissolved organic matter, finding that fulvic acid and humic acid adsorb onto microplastics through distinct mechanisms, which influences microplastic transport and transformation in the environment.
The difference of aggregation mechanism between microplastics and nanoplastics: Role of Brownian motion and structural layer force
The aggregation mechanisms of 100-nm and 1-micrometer polystyrene particles were compared under different water chemistry conditions to understand how microplastics and nanoplastics behave differently in aquatic environments. The study found distinct aggregation pathways between the two size classes, driven by differences in electrostatic forces and surface properties.
Repulsive Interactions of Eco-corona-Covered Microplastic Particles Quantitatively Follow Modeling of Polymer Brushes
Researchers demonstrated that the eco-corona layer formed by natural organic matter on microplastic surfaces creates long-range repulsive interactions between particles, following the polymer brush model and fundamentally altering how microplastics behave in the environment.
Impact of electrolyte and natural organic matter characteristics on the aggregation and sedimentation of polystyrene nanoplastics
Researchers examined how dissolved organic matter from different water sources affects the aggregation and sedimentation of polystyrene nanoplastics under varied salt concentrations and temperatures, finding that biopolymers form a protective 'eco-corona' around particles that strongly inhibits long-term sedimentation, while temperature influences aggregation dynamics in complex ways.
Interaction of Dissolved Organic Matters and Microplastics Regulates the Transport of Microplastics in Saturated Porous Media
Researchers studied how different types of dissolved organic matter affect the transport of polystyrene microplastics through saturated porous media. The study found that humic acid, bovine serum albumin, and sodium alginate all promoted microplastic mobility, with humic acid having the strongest effect due to electrostatic repulsion and steric hindrance mechanisms.
A comparative study of microplastics under the influence of soil-typical eco-coronas through laboratory and field incubation experiments
Researchers compared the formation and properties of soil-typical eco-coronas on microplastics through both laboratory incubation and real-world field experiments, examining how natural organic matter coatings of proteins, carbohydrates, and humic acids alter microplastic surface hydrophobicity and transport behaviour. The study found that eco-corona composition significantly influences how microplastics move through terrestrial environments and interact with soil organisms.
Surface functional group dependent enthalpic and entropic contributions to molecular adsorption on colloidal microplastics
This chemistry study measured how different organic molecules (charged and neutral) stick to the surface of various microplastic particles in water, finding that the plastic's surface chemistry strongly influences the strength and nature of these interactions. The work reveals that both electrostatic attraction and water structure at the plastic surface play a role in determining what contaminants microplastics can carry. This matters because microplastics act as "carriers" for other pollutants, and understanding the binding chemistry helps predict which toxins hitchhike with plastics into ecosystems and organisms.
Morphology and hygroscopicity of nanoplastics in sea spray
Researchers characterized the morphology, surface composition, and hygroscopicity of nanoplastics in sea spray aerosol, revealing how these particles mix internally and externally with marine organic matter and sea salt in the atmosphere.
Surface interactions of model microplastic particles in seawater
Researchers investigated the surface interaction and aggregation behavior of polypropylene (PP) and polyvinyl chloride (PVC) microplastic particles in seawater, examining the mechanisms driving particle aggregation that affects diffusivity, distribution, and bioavailability in marine environments. The findings provide insight into how microplastics aggregate under saline conditions and the ecological risks arising from aggregate formation.
Impact of natural organic matter and inorganic ions on the stabilization of polystyrene micro-particles
Researchers investigated how natural organic matter (NOM) and inorganic ions affect the stabilization and aggregation behavior of polystyrene nanoplastics in water, finding that NOM enhanced colloidal stability while high ionic strength promoted aggregation. The results indicate that water chemistry plays a dominant role in determining nanoplastic mobility and persistence in natural freshwater environments.
Modeling of vertical microplastic transport by rising bubbles
This study modeled the vertical transport of microplastic particles by rising bubbles in the ocean, finding that bubble-mediated transport significantly enhances surface concentration of microplastics and helps explain why surface measurements often show higher particle densities than bulk water predictions suggest.