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20 resultsShowing papers similar to Adsorption-desorption behaviors of ciprofloxacin onto aged polystyrene fragments in aquatic environments
ClearAdsorption 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.
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 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.
Interface behavior changes of weathered polystyrene with ciprofloxacin in seawater environment
Polystyrene microplastics were artificially weathered using a Fenton oxidation method and their interactions with the antibiotic ciprofloxacin in seawater were characterized, showing that weathering altered surface chemistry and modified adsorption behavior. The study reveals that the aging state of microplastics significantly affects their interactions with co-occurring pharmaceutical pollutants.
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.
Behavior and mechanisms of ciprofloxacin adsorption on aged polylactic acid and polyethlene microplastics
Researchers investigated how aging affects the adsorption of the antibiotic ciprofloxacin on polylactic acid and polyethylene microplastics, finding that aged plastics showed significantly enhanced adsorption capacity due to physicochemical surface changes.
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.
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.
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.
Behavior and mechanisms of ciprofloxacin adsorption on aged Polylactic Acid and Polyethylene microplastics
This study examined how aged polylactic acid (PLA) and polyethylene (PE) microplastics absorb the antibiotic ciprofloxacin in water. Aging changes the surface chemistry of microplastics, affecting how they pick up and carry antibiotics — which could deliver higher doses of these drugs to organisms that ingest the particles.
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.
Enhanced biotoxicity by co-exposure of aged polystyrene and ciprofloxacin: the adsorption and its influence factors
This study found that polystyrene microplastics aged by sunlight absorbed significantly more of the antibiotic ciprofloxacin than fresh microplastics, and the combination was more toxic to organisms than either pollutant alone. The aging process created more surface area and chemical binding sites on the plastic particles. This is important because it means weathered microplastics in the real world can concentrate antibiotics and deliver higher toxic doses to organisms, potentially contributing to both direct toxicity and antibiotic resistance.
Sorption of antibiotics onto aged microplastics in freshwater and seawater
Aged microplastics were found to sorb antibiotics from fresh and saltwater, with aging processes altering the surface properties of the plastic and increasing antibiotic binding capacity in some cases. The adsorption of antibiotics onto aged microplastics could facilitate their transport and delivery to aquatic organisms, potentially contributing to antibiotic resistance in environmental bacteria.
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.
Aging characteristics of degradable and non-biodegradable microplastics and their adsorption mechanism for sulfonamides
Researchers investigated how aging processes affect the ability of degradable and non-biodegradable microplastics to adsorb sulfonamide antibiotics in aquatic environments. The study found that aging increased the hydrophilicity and polarity of microplastics, boosting the adsorption capacity of polylactic acid by up to 3.18 times, suggesting that weathered microplastics may pose greater ecological risks as carriers of co-existing contaminants.
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.
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.
Adsorption behavior of levofloxacin hydrochloride on non‐degradable microplastics aging with H 2 O 2
This study explored how microplastics act as carriers for the antibiotic levofloxacin in water, finding that chemically aged plastics (simulating environmental weathering) adsorb significantly more of the drug than fresh plastics. All three plastics tested — PVC, polystyrene, and PET — showed increased drug-binding capacity after aging, primarily through pore-filling. This matters because microplastics in rivers and lakes don't just pose a physical hazard; they can pick up and concentrate pharmaceutical contaminants, potentially delivering them to aquatic organisms at higher doses.
Comparative study on the adsorption and desorption behaviors of quinolone pollutants on polystyrene microplastics of different particle sizes
Researchers compared how polystyrene microplastics of different particle sizes adsorb and release the antibiotic pollutants ciprofloxacin and gatifloxacin. The study found that smaller microplastics had higher adsorption capacity due to greater surface area and charge, and that pollutants were harder to release from smaller particles, suggesting that fine microplastics may more effectively transport antibiotic contaminants through aquatic environments.
Adsorption performance and mechanisms of ciprofloxacin onto microplastics: effects of different textures and aging degrees.
Researchers examined ciprofloxacin adsorption onto pristine and UV-aged polypropylene, polyvinyl chloride, and polyamide 6 microplastics, finding that UV aging increased oxygen-containing surface functional groups and raised maximum adsorption capacity by up to 40%, with density functional theory calculations identifying hydrogen bonding, electrostatic attraction, and π interactions as primary binding mechanisms.