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Papers
20 resultsShowing papers similar to Accumulation of polyethylene microplastics in river biofilms and effect on the uptake, biotransformation and toxicity of the antimicrobial triclosan
ClearAdsorption of the antimicrobial triclosan to microplastics impacts biofilm and planktonic microbial communities in freshwater
Researchers tested how triclosan—an antimicrobial compound—adsorbs to microplastics and what effect this has on microbial biofilm communities in freshwater. Triclosan-loaded microplastics shifted microbial community composition and increased abundance of antibiotic-resistant bacteria in biofilms, demonstrating that microplastics acting as vectors for antimicrobials can restructure freshwater microbial ecosystems.
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.
Interactions between Microplastics, Biofilms, and Antimicrobials in Freshwater Streams
This research investigated how microplastics interact with antimicrobial compounds and microbial biofilms in freshwater streams. The study hypothesized that antimicrobials adsorbed onto microplastic surfaces would alter the diversity, composition, and antimicrobial resistance of colonizing microbial communities, examining multiple polymer types including acrylic and nylon in microcosm experiments.
Microplastics as vectors of triclosan: relevance of the biofilm on Daphnia magna survival
Researchers evaluated polyethylene microplastics as vectors of triclosan (TCS) in Daphnia magna survival experiments, examining how biofilm formation on microplastic surfaces — simulating conditions downstream of wastewater treatment plants — modifies the adsorption and desorption of triclosan and consequently its toxicity to the zooplankton.
Bioaccessibility of Microplastic-Associated Antibiotics in Freshwater Organisms: Highlighting the Impacts of Biofilm Colonization via an In Vitro Protocol
Researchers found that biofilm colonization on microplastics significantly alters the bioaccessibility of associated antibiotics in freshwater organisms, with biofilms acting as reactive coatings that change how pollutants are released and taken up by aquatic life.
Biofilm formation on polyethylene microplastics and their role as transfer vector of emerging organic pollutants
This study examined how bacteria form biofilms on polyethylene microplastics and whether those biofilms help transport organic pollutants like common pharmaceuticals and pesticides. Researchers found that the bacterium Pseudomonas aeruginosa readily colonized microplastics, and the presence of contaminants in the water altered biofilm characteristics. The findings suggest that microplastics in waterways may act as carriers that help spread pharmaceutical and chemical pollutants through aquatic environments.
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.
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.
Microplastics influence the fate of antibiotics in freshwater environments: Biofilm formation and its effect on adsorption behavior
Researchers found that biofilm formation on microplastics in freshwater environments enhanced antibiotic adsorption by 24-51%, with potential pathogens detected in all biofilm communities across PVC, PA, and HDPE plastics.
Interactions of microplastics and organic compounds in aquatic environments: A case study of augmented joint toxicity
Researchers investigated how polystyrene microplastics interact with the antimicrobial compound triclosan in simulated environmental and cellular conditions. They found that surface-functionalized microplastics adsorbed significantly more triclosan and released it under cellular conditions, with the combination producing greater toxicity to human intestinal cells than either contaminant alone. The study suggests that microplastics can amplify the harmful effects of co-occurring organic pollutants.
Effects of biofilm formation on triclosan adsorption by UV-aged and pristine polystyrene microplastics in aquatic environments
Researchers investigated how biofilm formation on UV-aged versus pristine polystyrene microplastics affected triclosan adsorption, finding that biofilm-colonized aged microplastics had altered surface properties that changed triclosan uptake compared to unaged particles.
The potential of microplastics acting as vector for triclosan in aquatic environments
This systematic review found that microplastics can act as vectors for triclosan (an antibacterial agent) in aquatic environments, transporting it across trophic levels through hydrogen bonding, hydrophobic interactions, and electrostatic forces. The co-occurrence of microplastics and triclosan amplifies their combined toxicity to aquatic organisms beyond their individual effects.
Adsorption of Macrolide Antibiotics and a Metabolite onto Polyethylene Terephthalate and Polyethylene Microplastics in Aquatic Environments
Researchers studied how four macrolide antibiotics and a metabolite adsorb onto polyethylene terephthalate and polyethylene microplastics in water. They found that antibiotic adsorption followed a linear model, with PET showing higher adsorption capacity than polyethylene. The study suggests that microplastics in aquatic environments may serve as carriers for antibiotics, potentially affecting how these pharmaceutical pollutants are distributed in water systems.
Microplastics play a minor role in tetracycline sorption in the presence of dissolved organic matter
Researchers studied the sorption of the antibiotic tetracycline onto microplastics in the presence of dissolved organic matter, finding that dissolved organics competed strongly for binding sites on microplastics, meaning real-world conditions substantially reduce microplastic uptake of tetracycline.
In situ biofilm development on microplastics and its impact on PFAS adsorption in aquatic environment
Researchers deployed microplastics in a river system to allow natural biofilm colonization, then assessed how the resulting plastisphere affected PFAS adsorption. Biofilm formation substantially altered PFAS uptake onto microplastics, in some cases increasing adsorption, suggesting that biologically colonized microplastics behave as more effective PFAS carriers than virgin particles in natural water environments.
Microplastic-Associated Biofilms and Their Role in the Fate of Microplastics in Aquatic Environment
This review examines how microbial biofilms attached to microplastics in aquatic environments mediate the accumulation and transfer of chemical pollutants, exploring how the 'plastisphere' community influences the fate and ecotoxicological impact of microplastics and co-contaminants.
Adsorption behavior of triclosan on microplastics and their combined acute toxicity to D. magna
Researchers studied how the antibacterial chemical triclosan attaches to different types of microplastics in water and tested their combined toxicity on water fleas. They found that triclosan readily adsorbed onto polystyrene, polyethylene, and polypropylene microplastics, with the process influenced by water chemistry factors like pH and salt content. When water fleas were exposed to microplastics carrying triclosan, the combined toxicity was greater than from either contaminant alone.
Impacts of Biofilm Formation on the Fate and Potential Effects of Microplastic in the Aquatic Environment
Researchers reviewed how biofilm formation on microplastic surfaces affects the fate and potential ecological effects of microplastics in aquatic environments, finding that biofilms alter particle buoyancy, surface chemistry, and interactions with organisms.
Physicochemical behavior and ecological risk of biofilm-mediated microplastics in aquatic environments
This review explores how biofilm formation on microplastics in water environments changes their physical and chemical behavior, potentially increasing their ecological risks. Researchers found that biofilm-coated microplastics more readily absorb pollutants and antibiotic resistance genes, and may disrupt gut microbiota in organisms that ingest them. The findings suggest that the biological aging of microplastics in nature makes them more dangerous than freshly produced particles.
Assessment of bioavailability of microplastic-sorbed tetracycline to bacteria for activation of antibiotic resistance genes in water environments
Researchers examined whether antibiotics adsorbed onto microplastics retain their biological activity against bacteria in water environments. They found that tetracycline bound to microplastic surfaces remained bioavailable enough to promote the activation of antibiotic resistance genes in aquatic bacteria. The study suggests that microplastics carrying adsorbed antibiotics may contribute to the spread of antimicrobial resistance in water systems rather than simply immobilizing the drugs.