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61,005 resultsShowing papers similar to Effect of chlorination and ultraviolet on the adsorption of pefloxacin on polystyrene and polyvinyl chloride
ClearChlorination-improved adsorption capacity of microplastics for antibiotics: A combined experimental and molecular mechanism investigation
Researchers found that when microplastics go through chlorine disinfection in water treatment plants, they become better at absorbing antibiotics like tetracycline. Chlorination changes the surface of polystyrene microplastics, making them stickier for these drugs through stronger chemical bonding. This means treated wastewater may contain microplastics loaded with antibiotics, potentially increasing health risks when released into the environment.
The impact of chlorination on the tetracycline sorption behavior of microplastics in aqueous solution
Researchers found that chlorination, a common disinfection step in wastewater treatment, alters the surface chemistry of microplastics and changes their capacity to adsorb tetracycline antibiotics, with chlorinated microplastics showing modified sorption behavior that affects their role as antibiotic carriers.
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.
Transformation of dissolved organic matter leached from biodegradable and conventional microplastics under UV/chlorine treatment and the subsequent effect on contaminant removal
This study examined how dissolved chemicals leaching from both biodegradable and conventional microplastics behave during UV/chlorine water treatment. The treatment changed the chemical properties of the leached substances and actually inhibited the breakdown of a common antibiotic pollutant. The findings suggest that microplastic-derived chemicals in water could interfere with standard water purification processes, potentially reducing their effectiveness.
Modifications to sorption and sinking capability of microplastics after chlorination
Researchers found that chlorination disinfection at both low and high doses modified the surface chemistry of PE, PET, PS, and PVC microplastics, increasing surface area and reducing hydrophobicity while weakening their capacity to sorb contaminants like ciprofloxacin. The study concluded that chlorination generally reduces the role of microplastics as transport vectors for organic pollutants, though effects on buoyancy varied by polymer type.
Adsorption of tetracycline on polyvinyl chloride microplastics in aqueous environments
This study found that PVC microplastics in water can absorb up to 93% of the antibiotic tetracycline under certain conditions. This means microplastics may act as carriers for antibiotics and other pollutants, potentially delivering harmful chemicals into drinking water and the food chain. The findings highlight how microplastics can make other environmental contaminants more dangerous to human health.
Insight into the adsorption behaviors and bioaccessibility of three altered microplastics through three types of advanced oxidation processes
Scientists found that when common microplastics (polyethylene, polypropylene, and polystyrene) undergo water treatment processes like UV or chemical oxidation, their surfaces change in ways that make them better at absorbing harmful pollutants. The treated microplastics also released more chemicals during simulated human digestion, meaning people who ingest these particles may absorb more toxins from them. This is concerning because most microplastics in drinking water have already been through some form of water treatment.
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.
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.
Microplastic-Pharmaceutical Interactions and Their Disruptive Impact on UV and Chemical Water Disinfection Efficacy
This paper explores how microplastics originating from pharmaceutical coatings may interfere with common water disinfection methods including UV irradiation and chemical treatment like chlorination. Researchers propose that these microplastics can disrupt disinfection through physical shielding of pathogens, adsorption of disinfectant chemicals, and catalytic transformation of treatment agents. The findings suggest that pharmaceutical-derived microplastics represent an underrecognized challenge for maintaining water treatment effectiveness.
Insight into the effect of UVC-based advanced oxidation processes on the interaction of typical microplastics and their derived disinfection byproducts during disinfection
Scientists found that UV-based water treatment processes, while intended to clean drinking water, caused microplastics to release more organic matter and form more disinfection byproducts during chlorination. Up to 42% of the toxic byproducts formed were absorbed back onto the microplastic surfaces, creating contaminated particles. This concerning finding suggests that some common water treatment methods could unintentionally make microplastic contamination in drinking water more hazardous.
Photoaged microplastics enhanced the antibiotic resistance dissemination in WWTPs by altering the adsorption behavior of antibiotic resistance plasmids
Researchers found that microplastics exposed to UV light become significantly better at attracting and holding antibiotic resistance genes, increasing their capacity by 43 to 48 percent compared to unaged particles. This enhanced adsorption was linked to increased surface roughness and chemical changes on the plastic surface. The study suggests that UV-treated wastewater discharge may inadvertently accelerate the spread of antibiotic resistance in the environment through aged microplastics.
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.
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.
Modifications of ultraviolet irradiation and chlorination on microplastics: Effect of sterilization pattern
Researchers found that both UV irradiation and chlorination used in drinking water treatment alter the surface properties, size distribution, and chemical composition of microplastics, with combined treatments producing greater modifications and potentially increasing the release of plastic additives and adsorbed contaminants.
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.
Investigation of the effect of microplastics on the UV inactivation of antibiotic-resistant bacteria in water
Researchers found that polyethylene and polyvinyl chloride microplastics significantly reduced UV disinfection effectiveness against antibiotic-resistant bacteria, as bacteria associated with microplastic surfaces were shielded from UV exposure, creating a potential public health concern.
Adsorption characteristics of antibiotics on microplastics: The effect of surface contamination with an anionic surfactant
Researchers found that the common anionic surfactant SDBS coating polystyrene and polyethylene microplastics significantly altered their adsorption of the antibiotics oxytetracycline and norfloxacin. SDBS changed the surface charge and hydrophobicity of MPs in ways that increased antibiotic binding, suggesting surfactant-contaminated MPs pose a greater risk as antibiotic vectors in aquatic environments.
Implications of polystyrene and polyamide microplastics in the adsorption of sulfonamide antibiotics and their metabolites in water matrices
Researchers found that polystyrene and polyamide microplastics can absorb sulfonamide antibiotics from water, with smaller particles and acidic conditions increasing absorption significantly. This means microplastics in the environment can act as carriers for antibiotics, potentially spreading antimicrobial resistance. The finding raises concerns because people may be exposed to both microplastics and the drugs they carry through contaminated water and food.
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.
Investigation of antibiotic clarithromycin adsorption potential on microplastics
Researchers investigated the adsorption potential of the antibiotic clarithromycin onto various microplastic types under controlled laboratory conditions, examining how surface properties and environmental factors influence pharmaceutical-microplastic interactions. The study found that microplastics can adsorb clarithromycin, raising concern about microplastics acting as vectors for antibiotic transport and spread in aquatic environments.
Adsorption interactions between typical microplastics and enrofloxacin: Relevant contributions to the mechanism
This study investigated how common microplastics (polyethylene, PVC, and polystyrene) absorb the antibiotic enrofloxacin from the environment. The researchers found that microplastics can effectively bind antibiotics through multiple chemical mechanisms, with the strength of binding depending on water conditions like acidity. This is concerning because microplastics carrying antibiotics could transport them into the food chain, potentially contributing to antibiotic resistance and affecting human health.
Adsorption of antibiotics on microplastics
This study examined the adsorption of antibiotics onto different microplastic types, finding that sorption capacity depended on both the antibiotic's chemical properties and the plastic's surface characteristics, with implications for antibiotic transport in aquatic environments.
The fate and risk of microplastic and antibiotic sulfamethoxazole coexisting in the environment
Researchers investigated sulfamethoxazole antibiotic adsorption onto polyamide microplastics and found that pH significantly influenced uptake, with adsorbed antibiotics more readily released in natural water than ultrapure water, posing environmental risks.