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61,005 resultsShowing papers similar to Raman spectra characterization of size-dependent aggregation and dispersion of polystyrene particles in aquatic environments.
ClearAggregation 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.
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.
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.
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 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 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.
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.
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.
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.
Detection of submicron- and nanoplastics spiked in environmental fresh- and saltwater with Raman spectroscopy
Raman spectroscopy was evaluated for detecting submicron- and nanoplastic particles spiked into both fresh and saltwater samples, assessing the method's sensitivity and reliability across a range of polymer types in complex environmental matrices.
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.
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.
Effects of temperature and particle concentration on aggregation of nanoplastics in freshwater and seawater
The aggregation behavior of nanoplastics in freshwater and seawater was studied at different temperatures and particle concentrations, finding that salinity, particle concentration, and temperature all significantly influenced aggregation rates with implications for nanoplastic fate in aquatic environments.
Environmental factors-mediated behavior of microplastics and nanoplastics in water: A review
This review examines how environmental conditions such as pH, salt levels, and organic matter influence how microplastics and nanoplastics behave in water. The study found that these factors significantly affect whether tiny plastic particles clump together or stay dispersed, which in turn determines how far they travel and how available they are for organisms to ingest.
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.
Identification of polystyrene nanoplastics using surface enhanced Raman spectroscopy
Researchers demonstrated for the first time that surface-enhanced Raman spectroscopy (SERS) using silver nanoparticles can identify polystyrene nanoplastics as small as 50 nm in real water samples, providing a rapid detection method that bypasses conventional sample preparation and could advance environmental monitoring of nanoplastics previously invisible to standard analytical techniques.
[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.
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.
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.
Sensors for Polystyrene Nanoplastics Detection in Water Samples
This review assessed recent advances in sensor and biosensor technologies for detecting polystyrene nanoplastics in complex aquatic samples. The authors identified optical, electrochemical, and surface-enhanced Raman approaches as the most promising strategies, while highlighting the ongoing challenges of matrix interference and low-concentration detection limits.
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.
The Raman Spectroscopy Approach to Different Freshwater Microplastics and Quantitative Characterization of Polyethylene Aged in the Environment
Researchers used Raman spectroscopy to identify and characterize microplastics from multiple freshwater sites feeding the Baltic Sea, finding polypropylene, polyethylene, polycarbonate, and polystyrene as the most common polymer types. The study also demonstrated that Raman spectra can provide quantitative information on the crystallinity and density of aged polyethylene, enabling assessment of environmental weathering.
Impact of CeO2 nanoparticles on the aggregation kinetics and stability of polystyrene nanoplastics: Importance of surface functionalization and solution chemistry
Researchers used time-resolved dynamic light scattering to investigate how cerium dioxide nanoparticles influence the aggregation and stability of differently surface-functionalized polystyrene nanoplastics across multiple water chemistries. Results showed that CeO2 nanoparticles promoted heteroaggregation with nanoplastics, with natural organic matter and ionic strength modulating aggregate formation and the environmental mobility of nanoplastics.