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61,005 resultsShowing papers similar to Impact of water chemistry on surface charge and aggregation of polystyrene microspheres suspensions
ClearImpact 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.
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 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.
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.
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.
Aggregation 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.
Aggregation behavior of polystyrene nanoplastics: Role of surface functional groups and protein and electrolyte variation
Researchers studied how different surface coatings on polystyrene nanoplastics affect their tendency to clump together in water containing proteins and salts. They found that the type of surface functional group significantly changed how the particles aggregated, with proteins and electrolytes playing important roles in the process. The study helps explain how nanoplastics behave and transform as they move through natural water systems.
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.
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.
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.
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.
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 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.
Aggregation kinetics of fragmental PET nanoplastics in aqueous environment: Complex roles of electrolytes, pH and humic acid
Researchers investigated the aggregation kinetics of fragmental PET nanoplastics under varying electrolyte concentrations, pH, and humic acid conditions, finding that aggregation increased with higher electrolyte concentrations and lower pH. Divalent cations caused stronger aggregation than monovalent cations at equal concentrations, and humic acid significantly inhibited aggregation, highlighting how natural water chemistry governs nanoplastic fate.
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.
Novel measurement method of determining PS nanoplastic concentration via AuNPs aggregation with NaCl
Researchers examined how salinity and dissolved organic matter affect the aggregation and sedimentation of polystyrene nanoplastics in estuarine water, finding that higher salinity and humic acid promoted particle aggregation and accelerated settling. These dynamics influence the fate and bioavailability of nanoplastics in coastal 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.
[Effect of Water Components on Aggregation and Sedimentation of Polystyrene Nanoplastics].
Researchers investigated how sodium ions (Na+) and natural organic matter (NOM) affect the aggregation and sedimentation of polystyrene nanoplastics (PS-NPs) in six water types including seawater, lake water, and domestic sewage. They found that Na+ concentrations below 80 mmol/L facilitated PS-NP sedimentation, while NOM effects varied by water type, with findings informing the environmental fate and distribution of nanoplastics.
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.
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.
Stabilization of Fragmental Polystyrene Nanoplastic by Natural Organic Matter: Insight into Mechanisms
This study investigated how natural organic matter stabilizes fragmental polystyrene nanoplastics in aqueous environments, finding that humic and fulvic acid coatings reduce aggregation and enhance colloidal stability, affecting nanoplastic transport and bioavailability.
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.
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.