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20 resultsShowing papers similar to Aggregation behavior of polystyrene nanoplastics: Role of surface functional groups and protein and electrolyte variation
ClearAggregation kinetics of different surface-modified polystyrene nanoparticles in monovalent and divalent electrolytes
Researchers investigated how surface chemistry and morphology affect the clumping behavior (aggregation kinetics) of polystyrene nanoplastics in water, finding that surface charge and functional groups strongly govern stability, while dissolved organic matter can either inhibit or promote aggregation depending on concentration and whether mono- or divalent ions are present.
Influence of protein configuration on aggregation kinetics of nanoplastics in aquatic environment
Researchers investigated how five different proteins with varying structures affect the aggregation behavior of polystyrene nanoplastics in water under different ionic strength and pH conditions. They found that protein type and configuration significantly influenced whether nanoplastics clumped together or remained dispersed, with globular proteins like albumin having different effects than fibrous proteins like collagen. The study suggests that the protein composition of natural waters plays an important role in determining how nanoplastics behave and transport in aquatic environments.
Influence of environmental and biological macromolecules on aggregation kinetics of nanoplastics in aquatic systems
Researchers studied how natural macromolecules like humic acid, alginate, and proteins influence the clumping behavior of polystyrene nanoplastics in water. They found that these macromolecules generally stabilized nanoplastics in sodium chloride solutions but caused them to aggregate in calcium chloride solutions, with effects varying by pH. The findings suggest that the environmental fate and transport of nanoplastics in natural waters depends heavily on the surrounding organic molecules and water chemistry.
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.
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.
Raman spectra characterization of size-dependent aggregation and dispersion of polystyrene particles in aquatic environments.
This study used Raman spectroscopy to examine how the presence of salt, proteins, and organic matter influences the aggregation and dispersion of polystyrene nanoplastics in water. The findings show that environmental conditions significantly alter nanoplastic behavior and can complicate their detection, which has implications for understanding how nanoplastics move through aquatic environments.
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.
Effects of size and surface charge on the sedimentation of nanoplastics in freshwater
Researchers investigated how size and surface charge of polystyrene nanoplastics affect their sedimentation behavior in freshwater, finding that both properties significantly influence aggregation dynamics and settling rates, with implications for predicting nanoplastic fate in aquatic environments.
Aquatic behavior and toxicity of polystyrene nanoplastic particles with different functional groups: Complex roles of pH, dissolved organic carbon and divalent cations
Researchers systematically examined how water chemistry — pH, dissolved organic carbon, and divalent calcium and magnesium ions — affects the stability, aggregation, and toxicity of polystyrene nanoplastics with different surface functional groups, finding that complex solution conditions enhanced aggregation through cation bridging and increased oxidative gut damage in Daphnia magna.
Aggregation and stability of sulfate-modified polystyrene nanoplastics in synthetic and natural waters
Researchers studied how polystyrene nanoplastics behave in different water conditions, examining aggregation and stability under varying pH, salt types, and natural organic matter concentrations. The study found that nanoplastics remain highly stable and suspended in freshwater and even wastewater, but aggregate rapidly and settle in seawater. Natural organic matter was identified as the most significant factor affecting nanoplastic aggregation in waters with high ionic strength.
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.
Structural Compactness Governs the Environmental Fate of Polystyrene Nanoplastics: Reaggregation Mechanisms in Laboratory-Scale Aquatic Systems.
Scientists studied how tiny plastic particles from polystyrene (smaller than the width of a human hair) behave in water under different conditions like saltiness and water movement. They found that these plastic particles can break apart and stick back together, staying suspended in water for long periods and traveling far distances through rivers and oceans. This matters because it means these microscopic plastics could spread widely through water systems and potentially end up in our drinking water and food chain.
UV-induced aggregation of polystyrene nanoplastics: effects of radicals, surface functional groups and electrolyte
UV irradiation was found to increase the aggregation of polystyrene nanoplastics to varying degrees depending on surface functional groups and electrolyte conditions, with free radicals playing a key role. Understanding aggregation behavior is important for predicting how nanoplastics behave and settle in aquatic environments.
The crucial role of a protein corona in determining the aggregation kinetics and colloidal stability of polystyrene nanoplastics
Time-resolved dynamic light scattering was used to study how protein coronas — protein layers that form on nanoplastics in biological or environmental fluids — control the aggregation kinetics and colloidal stability of polystyrene nanoplastics. Protein identity and concentration profoundly shifted nanoplastic behavior, with implications for how these particles move and persist in natural water systems.
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.
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.
Effect of Nanoplastic Type and Surface Chemistry on Particle Agglomeration over a Salinity Gradient
Researchers investigated agglomeration behavior of four nanoplastic types differing in polymer composition and surface chemistry across a salinity gradient, finding that carboxylated PMMA remained stable at all salinities while plain PMMA and polystyrene nanoplastics agglomerated at elevated salt concentrations.
Surface functionalization determines behavior of nanoplastic solutions in model aquatic environments
Researchers used dynamic light scattering to show that surface chemistry dictates nanoplastic fate in water: positively charged amine-coated particles remain stable across a wide salinity range, while negatively charged plain and carboxylated particles aggregate into large clusters as ionic strength or salinity increases.
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.
Effect of salinity and humic acid on the aggregation and toxicity of polystyrene nanoplastics with different functional groups and charges
Researchers showed that surface charge governs nanoplastic behavior in water — higher salinity caused negatively charged nanoplastics to aggregate while positively charged particles remained stable — and that humic acid (dissolved organic matter) alleviated toxicity to Daphnia, increasing survival from 15% to nearly 100% in some cases.