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61,005 resultsShowing papers similar to The impact of dissolved organic matter on the photodegradation of tetracycline in the presence of microplastics
ClearInfluencing 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.
Roles of microplastic-derived dissolved organic matter on the photodegradation of organic micropollutants
Researchers discovered that dissolved organic matter released from weathered microplastics significantly inhibits the photodegradation of the antibiotic sulfamethoxazole in water, primarily through light screening effects, suggesting microplastic pollution may slow the natural breakdown of pharmaceutical contaminants.
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.
Effect of polystyrene microplastics on tetracycline photoconversion under simulated sunlight: Vital role of aged polystyrene
Researchers studied how polystyrene microplastics affect the breakdown of the antibiotic tetracycline in sunlight. They found that aged microplastics actually slowed down the antibiotic's photodegradation by blocking UV light, while fresh microplastics had the opposite effect. The study reveals that weathered microplastics may help antibiotics persist longer in the environment, potentially contributing to antibiotic resistance.
Biofilm-Colonized versus Virgin Black Microplastics to Accelerate the Photodegradation of Tetracycline in Aquatic Environments: Analysis of Underneath Mechanisms
Researchers found that biofilm-colonized tire wear particles accelerated the photodegradation of tetracycline in aquatic environments compared to virgin particles, revealing how microbial biofilms on microplastics can alter contaminant fate.
Insight into the effect of microplastics on photocatalytic degradation tetracycline by a dissolvable semiconductor-organic framework
Researchers investigated how polystyrene microplastics affect the photocatalytic degradation of the antibiotic tetracycline using a novel semiconductor-organic framework catalyst. They found that small amounts of microplastics actually promoted tetracycline breakdown but also altered the degradation products and pathways. The study reveals that microplastics can interfere with water treatment processes in unexpected ways, both helping and hindering pollutant removal depending on conditions.
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.
Composition and photodegradation transformation of Dissolved Organic Matter from microplastics versus natural sources: impacts on copper (Cu) and tetracycline (TC) binding behaviors.
Researchers compared photodegradation and pollutant-binding behavior of dissolved organic matter from HDPE and PLA microplastics versus natural leaf-litter sources, finding that microplastic-derived DOM loses aromaticity faster under UV and shows weaker copper and tetracycline binding after photodegradation, potentially increasing free antibiotic concentrations and antibiotic-resistance risks in contaminated waters.
The effects of environmental conditions on the enrichment of antibiotics on microplastics in simulated natural water column
Researchers investigated how environmental ageing conditions affect the ability of microplastics to adsorb the antibiotic tetracycline, finding that pH, ionic strength, and temperature had little effect, but humic acid significantly reduced adsorption capacity. The reduction was attributed to humic acid covering plastic surfaces, altering hydrophobicity, and competing for adsorption sites via electrostatic repulsion.
Effects and mechanisms of aged polystyrene microplastics on the photodegradation of sulfamethoxazole in water under simulated sunlight
Researchers found that aged polystyrene microplastics inhibited the photodegradation of the antibiotic sulfamethoxazole in water, with inhibition increasing proportionally to the aging degree due to light-scattering effects and reactive oxygen species quenching.
Influence of UV wavelength variations on tetracycline adsorption by polyethylene microplastics in aquatic environments
Exposure to UVC, UVB, and UVA light at different wavelengths differentially altered the surface chemistry of polyethylene microplastics and their subsequent adsorption capacity for the antibiotic tetracycline. Shorter UV wavelengths caused more extensive surface oxidation, increasing tetracycline adsorption by up to several fold and changing the antibiotic's environmental fate.
Unraveling the role of natural and pyrogenic dissolved organic matter in photodegradation of biodegradable microplastics in freshwater
Researchers investigated how dissolved organic matter from natural sources versus biochar affects the breakdown of biodegradable polylactic acid (PLA) microplastics in sunlight. Naturally sourced organic matter accelerated PLA degradation nearly twice as much as biochar-derived matter by generating more reactive oxygen species, suggesting that the type of organic matter in a waterway significantly influences whether biodegradable plastics actually break down.
Characteristics and mechanisms of dissolved organic matter leached by photodegradation of polyethylene microplastics: role of adsorbed antibiotics
Researchers investigated how UV-driven photoaging of polyethylene microplastics and their interactions with the antibiotic ofloxacin affect the release of dissolved organic matter in water. They found that UV exposure significantly increased DOM release from pristine microplastics, while antibiotic-adsorbed microplastics initially released different molecular weight compounds before converging to similar patterns. The study reveals that aging microplastics and their co-contaminants create complex secondary pollution dynamics in aquatic environments.
Photoaging processes of polyvinyl chloride microplastics enhance the adsorption of tetracycline and facilitate the formation of antibiotic resistance
Researchers found that UV photoaging of PVC microplastics significantly enhanced their ability to adsorb the antibiotic tetracycline and facilitated the development of antibiotic resistance in surrounding microorganisms, raising concerns about aged microplastics in aquatic environments.
Hydrophilic Fraction of Dissolved Organic Matter Largely Facilitated Microplastics Photoaging: Insights from Redox Properties and Reactive Oxygen Species
This study investigated how dissolved organic matter in natural water affects the breakdown of microplastics by sunlight. The water-soluble fraction of organic matter was most effective at speeding up microplastic aging by generating reactive oxygen species that attack the plastic surface. This matters because faster breakdown of microplastics in the environment creates smaller, potentially more dangerous nanoplastic particles that can more easily enter living organisms.
Increased bio-toxicity of leachates from polyvinyl chloride microplastics during the photo-aging process in the presence of dissolved organic matter
Researchers investigated how photo-aging of polyvinyl chloride microplastics is affected by the presence of dissolved organic matter in surface waters. They found that humic acid, a common component of dissolved organic matter, enhanced the degradation of PVC microplastics under light exposure and significantly increased the toxicity of the resulting chemical leachates. The study highlights the importance of considering dissolved organic matter when assessing the ecological risks of microplastic pollution in natural waters.
Comparative Photo‐Induced Aging of Poly(Butylene Adipate‐co‐Terephthalate) and Polystyrene Microplastics and their Divergent Affinities for Tetracycline in Aquatic Environments
Researchers UV-aged biodegradable PBAT and conventional polystyrene microplastics in river water for 30 days, finding that aging caused surface oxidation in PBAT while polystyrene showed minimal change, and that the two types had divergent affinities for adsorbing tetracycline.
Metagenomic and metabolomic insight into microplastic-derived inhibition of tetracycline degradation in sediments
Microplastics in aquatic sediments don't just sit there — this study found they actively interfere with the natural microbial processes that break down antibiotic compounds like tetracycline. By combining field sampling with lab experiments, researchers showed that microplastics disrupt the microbial communities responsible for tetracycline degradation, potentially allowing antibiotics to persist longer in the environment. This interaction between microplastics and antibiotic persistence is a concern for both ecosystem health and the spread of antibiotic resistance.
Research on the effect of dissolved organic matter on the adsorption of oxytetracycline by high-density polyethylene
Researchers studied how dissolved organic matter (DOM) influences the adsorption of oxytetracycline antibiotic onto high-density polyethylene microplastics in soil, finding that DOM acts as a bridging agent that enhances the HDPE–antibiotic interaction through hydrophobic complexation.
[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.
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.
Effect of microplastics on the degradation of tetracycline in a soil microbial electric field
Researchers explored how microplastics affect the degradation of the antibiotic tetracycline in soil microbial electrochemical systems. The study found that polylactic acid and polyvinyl chloride microplastics enhanced the electrical output of soil systems and accelerated tetracycline breakdown, with microplastic surfaces acting as hotspots for antibiotic degradation due to their distinct microbial communities.
Study on the photo-aging process and mechanism of polystyrene microplastics under different salinities mediated by humic acid
This study examined how sunlight breaks down polystyrene microplastics in water with different salt levels and dissolved organic matter. The combination of salt and humic acid accelerated the aging of microplastics, making them smaller and more chemically reactive. This matters because aged microplastics can more easily absorb toxic pollutants and are small enough to be taken up by organisms, increasing potential health risks.
UV-photoaging of degradable microplastics in atmospheric and wastewater: Surface changes and enhanced antibiotic interaction
When biodegradable microplastics spend time in wastewater rather than open air, they age much more aggressively — developing biofilms and oxidized surfaces that dramatically increase their ability to absorb antibiotics. This study found that wastewater-aged polybutylene succinate microplastics adsorbed 2.4 times more tetracycline than fresh plastic, and outperformed air-aged plastic by 40%, driven by biofilm chemistry and increased surface area. The implication is that wastewater treatment systems — rather than solving the microplastic problem — may be transforming biodegradable plastics into potent carriers for antibiotic resistance.