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61,005 resultsShowing papers similar to Colloidal Interactions of Microplastic Particles with Anionic Clays in Electrolyte Solutions
ClearInfluence of typical clay minerals on aggregation and settling of pristine and aged polyethylene microplastics
Researchers investigated how common clay minerals affect the aggregation and settling behavior of pristine and aged polyethylene microplastics in water. They found that high salt concentrations promoted the settling of microplastics when clay minerals were present, and that electrostatic repulsion was the dominant force governing interactions between plastics and clay particles. The findings provide new insights into how microplastics are transported and deposited in natural water systems.
Aggregation kinetics of microplastics in aquatic environment: Complex roles of electrolytes, pH, and natural organic matter
Researchers found that the aggregation behavior of polystyrene microplastics in water was strongly influenced by pH, ionic strength, and the presence of natural organic matter, with divalent cations like calcium and magnesium promoting aggregation. Understanding aggregation kinetics is critical for predicting how microplastics partition between suspended and settled states in natural water bodies.
Coaggregation of micro polystyrene particles and suspended minerals under concentrated salt solution: A perspective of terrestrial-to-ocean transfer of microplastics
Researchers found that polystyrene microplastics co-aggregate with suspended mineral colloids in concentrated salt solutions, with bentonite most efficiently driving aggregation, suggesting that mineral-microplastic aggregates may be an important mechanism for transporting microplastics from terrestrial environments to the ocean.
Interactions between nano/micro plastics and suspended sediment in water: Implications on aggregation and settling
Interactions between nanoplastics and suspended sediment were studied in NaCl solutions, finding that large sediment particles significantly enhanced settling of nanoplastics through heteroaggregation, with the effect increasing at higher ionic strength. The study reveals how sediment-nanoplastic aggregation drives vertical transport and burial of nanoplastics in aquatic environments.
Aggregation of microplastics and clay particles in the nearshore environment: Characteristics, influencing factors, and implications
Researchers studied how microplastics interact with natural clay particles in coastal waters, examining how factors like salinity, pH, and particle properties influence their aggregation behavior. They found that microplastics readily form clusters with clay particles, which changes how they settle and move through nearshore environments. Understanding this aggregation process is important for predicting where microplastics end up in coastal ecosystems and their potential exposure to marine organisms.
Interaction, Adhesion and Aggregation of Microplastic/Nanoplastic Particles: Effects of Plastic Polymer Type
This review examines how polymer type, particle size, shape, pH, ionic strength, and salt composition influence the interaction, adhesion, and aggregation behavior of microplastics and nanoplastics in aquatic and soil environments. The paper synthesizes findings on homoaggregation and heteroaggregation with natural and engineered nanoparticles, highlighting how aggregation affects particle transport and environmental fate.
Heterogeneous aggregation of microplastics and mineral particles in aquatic environments: Effects of surface functional groups, pH, and electrolytes
Researchers studied how microplastics clump together with soil and rock minerals in water, finding that positively charged minerals bound to plastic particles nearly three times more effectively than clay minerals, and that low pH and calcium ions dramatically accelerated aggregation. Understanding these dynamics helps predict where microplastics will settle or stay suspended in rivers, lakes, and aquifers.
Aggregation and Deposition Kinetics of Polystyrene Microplastics and Nanoplastics in Aquatic Environment
Researchers measured aggregation and deposition kinetics of 50 nm and 500 nm polystyrene particles under varying ionic strength and pH conditions, finding that both particle sizes aggregated rapidly at elevated salt concentrations and that the smaller nanoplastics were more mobile in column experiments.
Heteroaggregation and deposition behaviors of carboxylated nanoplastics with different types of clay minerals in aquatic environments: Important role of calcium(II) ion-assisted bridging
This study examined how nanoplastics interact with common clay minerals found in water, which affects how far the plastic particles can travel through the environment. Calcium and other positively charged ions act as bridges that cause nanoplastics to clump together with clay and settle out of water more quickly. Understanding this process is important because it determines whether nanoplastics stay suspended in drinking water sources or settle into sediments where they can affect bottom-dwelling organisms.
Suspended clay and surfactants enhance buoyant microplastic settling
Laboratory experiments found that suspended clay particles and surfactants can enhance the settling of buoyant microplastics by promoting aggregation and density increase, providing a physico-chemical mechanism explaining how buoyant plastics can sink in natural water bodies.
Heteroaggregation kinetics of nanoplastics and soot nanoparticles in aquatic environments
Researchers examined how polystyrene nanoplastics and soot particles aggregate together in aquatic environments, finding that particle ratio, salinity, pH, and dissolved organic matter all influence clumping rates — with calcium ions dramatically accelerating aggregation and potentially altering nanoplastic transport in coastal and marine waters.
Impact of iron/aluminum (hydr)oxide and clay minerals on heteroaggregation and transport of nanoplastics in aquatic environment
Researchers examined how polystyrene nanoplastics interact with nine different minerals in aquatic environments, finding that positively charged iron and aluminum (hydr)oxide minerals readily form aggregates with nanoplastics through electrostatic and hydrophobic forces, while humic acid and shifting pH significantly suppress this aggregation.
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.
Settling behavior of microplastic hetero-aggregates in aquatic environments with varying salinity
This lab study examined how changes in water saltiness affect whether microplastics clump together with sediment and sink. Increasing salinity encouraged microplastics to form larger aggregates with sediment particles, peaking at moderate salt levels (25 PSU), which influences how quickly they settle out of the water column. Understanding this behavior matters for predicting where microplastics end up in coastal and estuarine environments where fresh and salt water mix.
Role of Poly(Ionic Liquid) in Aggregation Behavior of Micro‐Particles in Aqueous Solvent
Researchers synthesized novel polymer-based flocculants (poly(ionic liquids)) that outperformed conventional aluminum-based coagulants in aggregating polypropylene and polystyrene microplastics from natural seawater, even under the high-salinity conditions where conventional treatments fail. Removing microplastics from marine environments is uniquely challenging because salt disrupts standard coagulation chemistry; these metal-free flocculants offer a more effective alternative. The work identifies a promising class of water treatment chemicals specifically suited to saltwater microplastic remediation.
Modeling of heteroaggregation driven buoyant microplastic settling: Interaction with multiple clay particles
Researchers developed a mathematical model for the heteroaggregation of buoyant microplastics with multiple clay particles, addressing the limitation of existing single-clay-particle models that cannot accurately simulate settling behavior of low-density plastics. The model improves prediction of vertical microplastic migration in aquatic environments by accounting for interactions with multiple clay particles simultaneously.
Mechanistic understanding of the aggregation kinetics of nanoplastics in marine environments: Comparing synthetic and natural water matrices
Researchers investigated aggregation kinetics of polystyrene nanoplastics in marine environments, finding that organic matter type and salt concentration strongly influenced particle stability, with nanoplastics in natural seawater aggregating differently than in synthetic matrices.
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.
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.
Understanding the stability of nanoplastics in aqueous environments: effect of ionic strength, temperature, dissolved organic matter, clay, and heavy metals
This study examined how environmental factors including ionic strength, temperature, dissolved organic matter, and clay affect the stability and aggregation of nanoplastics in water, finding that these conditions significantly influence particle behavior. Understanding nanoplastic stability is critical for predicting their fate, transport, and bioavailability in aquatic systems.
Impact of water chemistry on surface charge and aggregation of polystyrene microspheres suspensions
Researchers investigated how water chemistry factors such as pH, salt concentration, and humic acid affect the surface charge and aggregation behavior of polystyrene microspheres in aqueous solutions. The study found that higher ionic strength and lower pH promoted aggregation, while humic acid stabilized the particles, suggesting that water chemistry strongly influences the environmental fate and transport of microplastics.
Heteroaggregation of nanoplastic particles in the presence of inorganic colloids and natural organic matter
Nanoplastics were found to heteroaggregate extensively with inorganic colloids and natural organic matter in both freshwater and marine conditions, altering their size, surface charge, and settling behavior compared to pristine particles. The study demonstrates that nanoplastic behavior in natural waters is dominated by interactions with other environmental constituents rather than the intrinsic properties of the plastic alone.
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.
Heteroaggregation kinetics of oppositely charged nanoplastics in aquatic environments: Effects of particle ratio, solution chemistry, and interaction sequence
Researchers investigated how oppositely charged nanoplastics clump together (heteroaggregation) in water under varying pH, salt, and natural organic matter conditions, finding that electrostatic attraction drives aggregation but humic acid retards it more than sodium alginate, while the sequence and timing of chemical interactions also significantly alters the final aggregation behavior.