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61,005 resultsShowing papers similar to Studies on the effect of microplastics on the adsorption and migration of Phenanthrene in river sediment
ClearThe Impact of Microplastics on Adsorption of Chlorophenols by River-Suspended Sediments
This study investigated how the presence of microplastics in river water affects the ability of suspended sediments to adsorb toxic chlorophenol chemicals — pollutants found in herbicides and industrial discharges. The type of microplastic mattered greatly: PVC enhanced chlorophenol binding to sediment by up to 65%, while polystyrene and polyethylene actually reduced binding for certain chlorophenol types by competing for the same attachment sites. Environmental factors like pH, ionic strength, and the presence of humic acids further complicated the interactions. These findings show that microplastics don't just carry pollutants themselves — they can change how other contaminants behave in rivers, complicating risk assessments.
Different partition of polycyclic aromatic hydrocarbon on environmental particulates in freshwater: Microplastics in comparison to natural sediment
This study investigated how the polycyclic aromatic hydrocarbon phenanthrene partitions between water and three common plastic types, finding that polymer composition strongly influences sorption behavior. The results help explain how microplastics act as vectors for toxic organic compounds in aquatic environments.
Microplastics lag the leaching of phenanthrene in soil and reduce its bioavailability to wheat
Researchers found that polystyrene, polyethylene, and PVC microplastics delayed the downward leaching of phenanthrene through soil by adsorbing the contaminant, reducing its bioavailability to wheat, with adsorption capacity following the order PS > PE > PVC.
Adsorption of fluoranthene and phenanthrene by virgin and weathered polyethylene microplastics in freshwaters
Researchers examined how virgin and weathered polyethylene microplastics adsorb fluoranthene and phenanthrene in freshwater, finding that weathering significantly increased adsorption capacity and that water chemistry influenced contaminant uptake.
Different sorption behaviours of pyrene onto polyethylene microplastics in a binary system with water and a ternary system with water and sediment
Researchers examined how pyrene, a polycyclic aromatic hydrocarbon, sorbs onto polyethylene microplastics in binary water-microplastic and ternary water-microplastic-sediment systems, finding that sediment presence significantly altered sorption behavior and partition coefficients. The study clarifies how environmental matrices influence the interaction between microplastics and co-occurring organic contaminants.
Sorption of Pyrene and Fluoranthene onto Common Microplastics Under Freshwater Conditions
Researchers investigated how two common polycyclic aromatic hydrocarbons, pyrene and fluoranthene, bind to six different types of microplastic polymers under freshwater conditions. The study found significant differences in sorption capacity across polymer types, confirming that microplastics can act as vectors for transporting harmful organic pollutants through aquatic environments.
Microplastics meet micropollutants in a central european river stream: Adsorption of pollutants to microplastics under environmentally relevant conditions
Researchers investigated how microplastics adsorb organic micropollutants in a Central European river under real-world conditions. They found that aged microplastics showed higher adsorption capacity for contaminants compared to pristine ones, and that the type of plastic material influenced which pollutants were absorbed. The findings suggest that microplastics in rivers can act as carriers for harmful chemicals, potentially spreading contamination through aquatic ecosystems.
Adsorption and Desorption Behaviour of Polychlorinated Biphenyls onto Microplastics’ Surfaces in Water/Sediment Systems
Researchers evaluated the adsorption and desorption behavior of polychlorinated biphenyls (PCBs) onto polystyrene, polyethylene, and polyethylene terephthalate microplastics of varying sizes in marine water/sediment systems. Results showed that polymer type and particle size influenced PCB binding capacity, with microplastics acting as potential vectors for transferring persistent organic pollutants to marine biota through the food chain.
Adsorption of phenanthrene and its monohydroxy derivatives on polyvinyl chloride microplastics in aqueous solution: Model fitting and mechanism analysis
Researchers investigated the adsorption of phenanthrene and its four monohydroxy derivatives on polyvinyl chloride microplastics in aqueous solution, finding that phenanthrene adsorption was higher than that of its hydroxylated forms. The data fitted pseudo-second-order kinetics and Freundlich isotherm models, indicating that hydroxyl functional groups on pollutant molecules reduce their affinity for PVC microplastic surfaces.
Environmental condition-dependent effects of aquatic humic substances on the distribution of phenanthrene in microplastic-contaminated aquatic systems
This study examined how varying concentrations and types of aquatic humic substances influence the distribution of phenanthrene between microplastics and water, finding that humic substance composition significantly modulates contaminant partitioning in microplastic-contaminated systems.
Adsorption of Contaminants of Emerging Concern (CECs) with Varying Hydrophobicity on Macro- and Microplastic Polyvinyl Chloride, Polyethylene, and Polystyrene: Kinetics and Potential Mechanisms
Researchers found that both plastic size and polymer type influenced the adsorption of contaminants of emerging concern onto PVC, polyethylene, and polystyrene, with microplastics generally adsorbing more than macroplastics and contaminant hydrophobicity playing a key role in determining adsorption kinetics and capacity.
Comparative evaluation of sorption kinetics and isotherms of pyrene onto microplastics
This study compared how quickly and how much pyrene — a common polycyclic aromatic hydrocarbon — is absorbed by different types of microplastics in aquatic environments. The results indicate that microplastic polymer type significantly affects how well it concentrates and potentially transports toxic organic chemicals.
The adsorption process and mechanism of benzo[a]pyrene in agricultural soil mediated by microplastics
Researchers investigated how different types of microplastics affect the adsorption of the carcinogenic pollutant benzo[a]pyrene in agricultural soil. They found that PVC microplastics had the strongest capacity to adsorb this pollutant, increasing soil adsorption by nearly four times compared to soil alone. The study suggests that microplastics in agricultural soils may concentrate harmful organic pollutants, potentially altering their environmental fate and bioavailability.
The adsorption and desorption behaviors of phenanthrene and pyrene onto microplastics in the aquatic environment and digestive fluids
This study examined how polycyclic aromatic hydrocarbons (PAHs) like phenanthrene and pyrene adsorb to and desorb from four types of microplastics in both freshwater and simulated digestive fluids. The findings show that PAHs bind strongly to microplastics and can be released under digestive conditions, suggesting that microplastics can deliver organic pollutants to organisms that ingest them.
Effects of virgin microplastics on the transport of Cd (II) in Xiangjiang River sediment
Six types of microplastics were found to change how cadmium (a toxic heavy metal) binds to and moves through river sediments. The presence of microplastics altered cadmium adsorption behavior, suggesting that plastics in river sediments can affect the mobility and bioavailability of co-occurring heavy metal pollutants.
Adsorption of 2-hydroxynaphthalene, naphthalene, phenanthrene, and pyrene by polyvinyl chloride microplastics in water and their bioaccessibility under in vitro human gastrointestinal system
Researchers studied how polyvinyl chloride microplastics adsorb organic pollutants including naphthalene and pyrene, and then tested how these pollutants are released in simulated human digestive fluids. The study found that larger aromatic compounds with more rings adsorbed more strongly to microplastics, and that pollutant release rates were higher in human gastrointestinal fluid than in fish intestinal fluid.
Influence of microplastics on nutrients and metal concentrations in river sediments
Researchers investigated how microplastics influence nutrient and metal concentrations in river sediments, finding that microplastics alter the distribution of pollutants through their capacity to adsorb contaminants and support biofilm formation on their hydrophobic surfaces.
Impact of polyethylene microplastics on the vertical migration of pesticides in soil
Researchers investigated how polyethylene microplastics affect the vertical migration of pesticide mixtures in soil using stainless steel column experiments with sandy reference soil, finding that microplastics' hydrophobic surfaces and high sorption capacity altered the transport of 20 pesticides compared to uncontaminated soil.
Prediction of organic compounds adsorbed by polyethylene and chlorinated polyethylene microplastics in freshwater using QSAR
Researchers used QSAR modeling to predict the adsorption behavior of 13 organic compounds onto polyethylene and chlorinated polyethylene microplastics under freshwater conditions, finding that most chemicals exhibited higher adsorption to chlorinated polyethylene than to standard polyethylene.
Microplastic–Contaminant Interactions: Influence of Nonlinearity and Coupled Mass Transfer
This study examined how microplastics absorb and release pollutants (specifically phenanthrene, a hydrocarbon) in river and ocean water, finding the relationship is complex and non-linear. Understanding contaminant transport by microplastics is crucial for assessing their risk as carriers of toxic chemicals in aquatic environments.
Exploring the adsorption behavior of benzotriazoles and benzothiazoles on polyvinyl chloride microplastics in the water environment
Researchers systematically investigated the adsorption behavior of benzotriazoles and benzothiazoles on polyvinyl chloride microplastics in aquatic environments, characterizing adsorption kinetics, isotherms, and thermodynamics to explain the underlying mechanisms. The study revealed that PVC microplastics act as carriers for these ubiquitous water contaminants through a multilayer adsorption process, with implications for pollutant migration and ecological risk.
Adsorption of some hazardous aromatic hydrocarbons by various pristine and heat-activated aged microplastics as potential pollutant carriers in aquatic environment
Researchers examined how pristine and heat-aged microplastics of four polymer types adsorb hazardous aromatic hydrocarbons, finding that aging significantly altered adsorption capacity. The results demonstrate that weathered microplastics may act as more effective pollutant vectors than pristine particles in aquatic environments.
Adsorption of nonylphenol on coastal saline soil: Will microplastics play a great role?
Researchers examined how polyvinyl chloride, polyethylene, and polypropylene microplastics affect the adsorption of the endocrine-disrupting compound nonylphenol onto coastal saline soil, finding that smaller PVC microplastics (0.11 mm) at 10% addition enhanced soil adsorption capacity by 117%, indicating microplastics significantly alter contaminant behavior in coastal soils.
New insights into the distribution and interaction mechanism of microplastics with humic acid in river sediments
Researchers found that microplastics and humic acids interact significantly in river sediments, with humic acid coating altering microplastic surface properties and affecting their distribution at different sediment depths, influencing the environmental fate and pollutant-carrying capacity of microplastics.