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61,005 resultsShowing papers similar to Effects of biofilm formation on triclosan adsorption by UV-aged and pristine polystyrene microplastics in aquatic environments
ClearThe sorption behavior of triclosan on microplastics: aging effects and mechanisms
Researchers investigated how environmental aging processes change the ability of polyethylene, polypropylene, and polystyrene microplastics to absorb the antimicrobial compound triclosan. They found that aging increased sorption capacity for polyethylene but decreased it for polypropylene, with polystyrene showing mixed results depending on the aging method. The changes were driven by modifications to surface chemistry, particularly the introduction of oxygen-containing functional groups that alter hydrophobic and electrostatic interactions.
Adsorption-desorption behaviors of ciprofloxacin onto aged polystyrene fragments in aquatic environments
Researchers investigated how UV and chemical aging of polystyrene microplastic fragments affects their adsorption and desorption of the antibiotic ciprofloxacin in aquatic environments, finding that aging increased surface area and altered surface chemistry, thereby enhancing adsorption capacity. The study identified key physicochemical properties controlling antibiotic-microplastic interactions and their potential to affect antibiotic bioavailability in contaminated waters.
Effects of particle size and solution chemistry on Triclosan sorption on polystyrene microplastic
Researchers characterized how the antimicrobial compound triclosan adsorbs onto polystyrene microplastics, finding that sorption is driven primarily by hydrophobic interactions and is highest at acidic pH, while temperature, ionic strength, and co-occurring heavy metals had little effect — suggesting polystyrene acts as an environmental carrier for triclosan.
Effects of biofilm on metal adsorption behavior and microbial community of microplastics
Researchers found that biofilm development on polystyrene microplastics enhanced their ability to adsorb copper and lead more than UV aging alone, with biofilm altering both the adsorption mechanisms and microbial community composition on the plastic surfaces.
Tetracycline adsorption trajectories on aged polystyrene in a simulated aquatic environment: A mechanistic investigation
Researchers found that aging of polystyrene microplastics in simulated aquatic environments progressively altered their surface properties and enhanced tetracycline antibiotic adsorption over time, with pseudo-second-order kinetics best describing the process, highlighting how weathered microplastics may increase antibiotic transport in aquatic systems.
Adsorption of levofloxacin by ultraviolet aging microplastics
Researchers studied how ultraviolet aging changes the ability of common microplastics to adsorb the antibiotic levofloxacin. The study found that UV-aged polystyrene, polyamide, and polyethylene microplastics all showed significantly enhanced adsorption capacity compared to their unaged counterparts, suggesting that weathered microplastics in the environment may carry higher pollutant loads.
Sorption behavior and mechanism of hydrophilic organic chemicals to virgin and aged microplastics in freshwater and seawater
UV-accelerated aging of polystyrene and PVC microplastics increased surface oxidation and introduced microcracks, and aged MPs showed significantly increased adsorption of the hydrophilic antibiotic ciprofloxacin compared to virgin MPs. The findings demonstrate that even hydrophilic organic chemicals can accumulate on aged microplastics, expanding the range of compounds that microplastics may carry and deliver to organisms.
Adsorption behavior of triclosan on polystyrene nanoplastics: The roles of particle size, surface functionalization, and environmental factors
Researchers examined how triclosan, an antimicrobial compound common in personal care products, adsorbs onto polystyrene nanoplastics of different sizes and surface chemistries, finding that smaller particles and functionalized surfaces (with carboxyl or amine groups) bind more triclosan, with pH and salinity further modulating uptake — suggesting nanoplastics can serve as mobile carriers for this contaminant.
Microplastics modulate triclosan abiotic methylation: Effects of polymer type and photoaging
Researchers investigated how 11 types of pristine and UV-aged microplastics alter the chemical transformation (methylation) of co-occurring triclosan in water, finding that polymer chemistry and photoaging both critically determine whether microplastics accelerate, inhibit, or have no effect on this reaction.
[Effect of Aging on Adsorption of Tetracycline by Microplastics and the Mechanisms].
Researchers aged polyethylene and polystyrene microplastics under UV-254 irradiation and analyzed changes in color, surface morphology, and functional groups, finding that UV aging altered the physical and chemical properties of both MPs and significantly affected their adsorption capacity and mechanism for the antibiotic tetracycline.
Adsorption of Macrolide Antibiotics by Aged Microplastics of Different Sizes: Mechanisms and Effects
Researchers investigated how aging affects the ability of polystyrene microplastics to adsorb macrolide antibiotics in water, testing two particle sizes under simulated natural aging conditions. They found that aging increased surface roughness and oxygen-containing functional groups on the microplastics, significantly enhancing their ability to adsorb azithromycin, clarithromycin, and erythromycin. The findings suggest that weathered microplastics in the environment may carry higher loads of antibiotic contaminants than pristine particles.
Biofilm formation strongly influences the vector transport of triclosan-loaded polyethylene microplastics
Researchers found that biofilm formation on polyethylene microplastics strongly influences their role as vectors for triclosan transport, with biofouled microplastics showing altered pollutant sorption capacity and different toxicity effects on Daphnia magna.
Enhanced adsorption of oxytetracycline to weathered microplastic polystyrene: Kinetics, isotherms and influencing factors
Researchers compared how weathered and new polystyrene foam particles absorb the antibiotic oxytetracycline from water. They found that beached foam that had been exposed to environmental conditions absorbed roughly twice as much of the drug as virgin material, due to increased surface area and chemical changes from weathering. The study suggests that aged microplastics in the environment are more effective at picking up and transporting pharmaceutical contaminants.
Influencing Mechanisms of Exogenous and Endogenous Dissolved Organic Matter on the Adsorption of Tetracycline on UV ‐Light Aged Microplastics
Researchers investigated how humic acid and microplastic-derived dissolved organic matter (MP-DOM) influence tetracycline adsorption onto UV-aged polyethylene and polystyrene microplastics, finding that UV aging increased surface area and functional groups on the plastics while dissolved organic matter altered adsorption capacity through competitive and facilitative mechanisms.
UV and chemical aging alter the adsorption behavior of microplastics for tetracycline
Researchers found that UV and chemical aging significantly increased microplastics' capacity to adsorb tetracycline, with biodegradable PBAT showing more dramatic changes in surface properties and adsorption behavior compared to conventional plastics like polystyrene and polyethylene.
Aging mechanism of microplastics with UV irradiation and its effects on the adsorption of heavy metals
Researchers aged polystyrene microplastics using UV irradiation under three conditions (air, pure water, seawater) and found that aging changed surface chemistry and increased the microplastics' capacity to adsorb heavy metals, with seawater aging producing the most pronounced surface oxidation.
Adsorption characteristics of ciprofloxacin hydrochloride on polystyrene microplastics in freshwater
Researchers studied how polystyrene microplastics adsorb the antibiotic ciprofloxacin in freshwater, comparing pristine and aged particles. They found that aging treatment, particularly Fenton oxidation over seven days, significantly enhanced the adsorption capacity of the microplastics for the antibiotic. The study suggests that as microplastics weather in the environment, they may become increasingly effective carriers of pharmaceutical contaminants in water systems.
Effects of erythromycin on biofilm formation and resistance mutation of Escherichia coli on pristine and UV-aged polystyrene microplastics
Researchers investigated how the antibiotic erythromycin affects bacterial biofilm formation on both new and UV-weathered polystyrene microplastics. They found that UV aging significantly changed the surface properties of the plastic, increasing its ability to absorb antibiotics and promote antibiotic-resistant bacterial mutations. The study suggests that weathered microplastics in the environment may act as hotspots for the development and spread of antibiotic resistance.
Impact of sequential UV-aging of microplastics on the fate of antibiotic (tetracycline) in riverine, estuarine, and marine systems
Researchers studied how sequential UV aging of polystyrene, polypropylene, and polyethylene microplastics, which mimics natural weathering, affects their ability to adsorb the antibiotic tetracycline under different water chemistry conditions. They found that aged microplastics adsorbed significantly more tetracycline than pristine particles, with the effect varying by water type and plastic polymer. The study suggests that as microplastics weather in the environment, they may become increasingly effective at carrying antibiotic contaminants.
Impact of the hydrated functional zone on the adsorption of ciprofloxacin to microplastics under the influence of UV aging
Researchers investigated how UV aging of polyethylene and polystyrene microplastics affects their adsorption of the antibiotic ciprofloxacin, finding that UV-aged particles developed rougher surfaces with increased hydrophilicity due to the formation of a hydrated functional zone. Adsorption isotherm and kinetic modelling showed that this surface transformation significantly altered the binding capacity and mechanisms for ciprofloxacin, with pH also playing a key role in adsorption efficiency.
Influence of aging on the affinity between microplastics and organic contaminants
Researchers investigated how UV and UV+H2O2 aging affects the capacity of polystyrene microplastics to adsorb and release pesticides and other organic contaminants, finding that aging-induced surface changes significantly altered adsorption affinity and desorption behavior compared to unaged controls.
The Effects of Pristine and Aged Microplastics on Biofilm Formation and Antibiotic Production
Researchers examined how pristine versus UV-light-aged polypropylene microplastics differentially affect biofilm formation and antibiotic production in microorganisms using a 96-well microplate assay, finding that surface aging alters the microbial colonization dynamics on microplastic surfaces. The study highlights the role of environmental weathering in changing how microplastics interact with microbial communities, with implications for the spread of antimicrobial resistance.
Quantitative assessment of interactions of hydrophilic organic contaminants with microplastics in natural water environment
Researchers quantified how microplastics interact with common antibiotic pollutants in natural water conditions, comparing virgin and environmentally aged polystyrene particles. They found that aged microplastics absorbed significantly more antibiotics than new ones due to increased surface area and chemical changes from weathering. The study suggests that as microplastics age in the environment, they become more effective at concentrating and transporting other harmful pollutants.
Interactive effects of microplastics and selected pharmaceuticals on red tilapia: Role of microplastic aging
Researchers compared how aged versus virgin polystyrene microplastics interact with the antibiotic sulfamethoxazole and the beta-blocker propranolol in red tilapia. They found that aged microplastics, which have rougher surfaces from UV weathering, adsorbed more pharmaceuticals and altered their bioavailability to the fish. The study demonstrates that environmental aging of microplastics changes their capacity to carry and release pharmaceutical contaminants in aquatic systems.