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61,005 resultsShowing papers similar to Adsorption mechanism of As(III) on polytetrafluoroethylene particles of different size
ClearThe influence of humic and fulvic acids on polytetrafluoroethylene-adsorbed arsenic: a mechanistic study
Researchers investigated how PTFE microplastics adsorb arsenic in water in the presence of humic and fulvic acids, finding that humic acid forms π-complexes with PTFE that increase oxygen-bearing surface functional groups, substantially enhancing arsenic adsorption through hydrogen bonding and pore-filling mechanisms.
As(III) adsorption onto different-sized polystyrene microplastic particles and its mechanism
Researchers studied how arsenic adsorbs onto polystyrene microplastic particles of different sizes prepared by ball milling. They found that smaller particles with greater surface area adsorbed more arsenic, with hydrogen bonding and electrostatic attraction driving the process. The study indicates that microplastics in the environment could serve as carriers for arsenic contamination, with adsorption influenced by pH, temperature, and the presence of other ions.
Interface adsorption characteristics of microplastics on multiple morphological arsenic compounds
Researchers studied how polystyrene and PET microplastics adsorb different forms of arsenic, a toxic element commonly found in contaminated water. They found that polystyrene had a much higher capacity to bind arsenic compounds than PET, and that the arsenic-loaded microplastics were more toxic to organisms than either pollutant alone. The study highlights that microplastics can act as carriers for toxic heavy metals, amplifying their environmental harm.
Adsorption of As(III) by microplastics coexisting with antibiotics
This study examined how microplastics absorb arsenic, a toxic metal, from water, especially when antibiotics are also present. Smaller and more aged microplastic particles absorbed more arsenic, and environmental factors like pH and dissolved organic matter significantly changed absorption rates. This is relevant to human health because microplastics in contaminated water can concentrate toxic metals like arsenic on their surface and potentially carry them into drinking water or the food chain.
Arsenic adsorption by carboxylate and amino modified polystyrene micro- and nanoplastics: kinetics and mechanisms
Researchers found that functionalized polystyrene micro- and nanoplastics can adsorb arsenic from water, with carboxylate-modified particles showing higher capacity than amino-modified ones, and that salinity and humic acids inhibit adsorption, confirming microplastics can alter arsenic behavior in ecosystems.
[Adsorption Characteristics of Arsenic on UV-aged Polypropylene Microplastics in Aqueous Solution].
This study examined how UV weathering (aging) changes the ability of polypropylene microplastics to adsorb arsenic from water, finding that aged plastic had rougher surfaces and more oxygen-containing groups, which enhanced arsenic adsorption. Environmental factors like pH and dissolved organic matter also influenced how much arsenic stuck to the plastic. Because aged microplastics bind more arsenic, they could carry this toxic heavy metal into aquatic food webs more effectively than pristine plastic particles.
Adsorption of arsenite to polystyrene microplastics in the presence of humus
Polystyrene microplastics adsorb arsenic more effectively when humic acid is present in the water, because the organic matter forms a coating on the plastic surface that attracts more arsenic ions. This finding suggests that microplastics can serve as vectors for the toxic metalloid arsenic in natural water environments.
Impact of Microplastics on the Fate and Behaviour of Arsenic in the Environment and Their Significance for Drinking Water Supply
This review highlights a largely overlooked problem: microplastics in the environment can adsorb arsenic — one of the world's most dangerous water contaminants — onto their surfaces and potentially transport it to new locations or make it harder to remove during drinking water treatment. The authors call for urgent research into how the presence of microplastics affects the performance of arsenic removal technologies, since both pollutants now co-occur in water sources globally.
Adsorption of perfluoroalkyl substances on microplastics under environmental conditions
Researchers examined the capacity of three types of microplastics to sorb 18 perfluoroalkyl substances from freshwater and seawater. They found that perfluorosulfonates and sulfonamides had the strongest tendency to adsorb onto microplastics, with polystyrene showing greater affinity for these chemicals than polyethylene. The study suggests that microplastics in aquatic environments can concentrate harmful PFAS compounds, potentially increasing exposure for organisms that ingest them.
Effects of polystyrene microplastics on the distribution behaviors and mechanisms of metalloid As(III) and As(V) on pipe scales in drinking water distribution systems
Researchers examined how polystyrene microplastics affect the distribution and adsorption mechanisms of arsenic species As(III) and As(V) onto pipe scales in drinking water distribution systems under varying water conditions. The study found that polystyrene microplastics competed with pipe scale surfaces for arsenic adsorption, altering the partitioning of metalloid contaminants and raising concerns about microplastic-mediated changes to drinking water quality.
Adsorption of perfluoroalkyl substances on polyamide microplastics: Effect of sorbent and influence of environmental factors
Researchers studied how perfluoroalkyl substances (PFAS), a group of persistent industrial chemicals, bind to polyamide microplastics in water. They found that smaller microplastic particles absorbed dramatically more PFAS than larger ones, and that water chemistry conditions like pH and salinity influenced the process. The findings suggest microplastics can concentrate harmful chemicals and potentially increase human and wildlife exposure to PFAS in contaminated environments.
Adsorption of PFAS onto secondary microplastics: A mechanistic study
Researchers investigated how PFAS (per- and polyfluoroalkyl substances) adsorb onto secondary microplastics under different water chemistry conditions. Results showed that PFAS adsorption depended on both the chemical structure of the PFAS compound and the ionic composition of the water. These findings help explain how microplastics in real-world aquatic environments can concentrate and transport PFAS, a group of persistent health-relevant pollutants.
Effect and mechanism of coexistence of microplastics on arsenate adsorption capacity in water
Researchers examined how the presence of microplastics affects the ability of different materials to adsorb arsenate from contaminated water. They found that microplastics can interfere with the adsorption process, particularly by competing for binding sites on adsorbent materials like ZIF-8. The study highlights that co-contamination of water with both microplastics and heavy metals may complicate pollution remediation efforts.
Sorption of tetrabromobisphenol A onto microplastics: Behavior, mechanisms, and the effects of sorbent and environmental factors
The sorption of the flame retardant tetrabromobisphenol-A (TBBPA) onto four types of microplastics — polyethylene, polypropylene, polystyrene, and polyvinyl chloride — was studied in aqueous environments. Results revealed that polymer type, surface area, and hydrophobic interactions were key factors controlling how much TBBPA accumulates on microplastic surfaces.
Interaction mechanism of water-soluble inorganic arsenic onto pristine nanoplastics
Researchers used computational chemistry to model how water-soluble arsenic interacts with various types of nanoplastics including PET, polyamide, PVC, polyethylene, polypropylene, and polystyrene. The study found that arsenic can form stable surface layers on nanoplastics, suggesting these tiny plastic particles may serve as carriers for toxic metalloids in contaminated aquatic environments.
Iron-Loaded Microplastics: An Unintended Legacy of Fenton Wastewater Treatment with High Affinity for Arsenic
Scientists found that a common wastewater treatment process accidentally creates tiny plastic particles coated with iron that can soak up large amounts of arsenic, a toxic chemical. These iron-coated microplastics can absorb up to 26 times more arsenic than regular plastic particles, potentially affecting how this poison moves through our environment. This discovery matters because it could change how arsenic spreads in water and soil where people might be exposed to it.
Co-transport of arsenic and micro/nano-plastics in saturated soil
Column experiments found that 100 nm nanoplastic particles reduced arsenic transport in saturated sand by adsorbing arsenic ions, while 5 micron microplastics enhanced arsenic transport through electrostatic adsorption and pore plugging, demonstrating size-dependent and opposing effects of micro- and nanoplastics on co-contaminant mobility.
Polystyrene and low-density polyethylene pellets are less effective in arsenic adsorption than uncontaminated river sediment
Researchers found that polystyrene and low-density polyethylene microplastic pellets adsorb significantly less arsenic than natural river sediment, suggesting microplastics may actually reduce arsenic mobility when mixed with contaminated sediments.
Sorption and desorption kinetics of PFOS to pristine microplastic
Researchers investigated how the persistent pollutant PFOS sorbs onto polyethylene microplastic particles of different sizes over six months. They found that smaller microplastic particles adsorbed more PFOS due to their greater surface area, and that PFOS could be released from the microplastics under simulated fish gut conditions. The findings suggest that microplastics may act as carriers of chemical pollutants into the digestive systems of aquatic organisms.
Mechanistic Insights into PFAS Adsorption on Microplastics: Effects of Contaminant Properties and Water Chemistry
Researchers investigated how two widely detected PFAS compounds, PFOS and PFOA, adsorb onto five common types of microplastics in aquatic environments. The study found that contaminant properties and water chemistry significantly influence adsorption behavior, confirming that microplastics can serve as carriers for PFAS transport in waterways.
Competitive mechanism of microplastic addition for the adsorption of arsenic from an aqueous solution by magnetic biochar-supported layered double hydroxide
Researchers investigated competitive interactions between different microplastic types and pentavalent arsenic (As(V)) during adsorption onto a magnetic biochar-supported layered double hydroxide composite (MBC@LDH), examining the effects of pH, ionic strength, temperature, material dosage, and microplastic concentration. Their results revealed that microplastic presence significantly altered As(V) adsorption efficiency, with the competitive mechanisms varying by microplastic type and solution conditions.
The role of microplastics in altering arsenic fractionation and microbial community structures in arsenic-contaminated riverine sediments
The addition of microplastics to arsenic-contaminated riverine sediments altered arsenic fractionation and shifted microbial community structures, with biodegradable plastics producing different effects compared to conventional polymers. The study demonstrates that microplastics can modify the environmental behavior of co-existing toxic metals in sediment ecosystems.
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.
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.