We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Papers
61,005 resultsShowing papers similar to Composition and photodegradation transformation of Dissolved Organic Matter from microplastics versus natural sources: impacts on copper (Cu) and tetracycline (TC) binding behaviors.
ClearCharacteristics 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.
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.
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.
The impact of dissolved organic matter on the photodegradation of tetracycline in the presence of microplastics
Researchers investigated how dissolved organic matter affects the photodegradation of the antibiotic tetracycline in the presence of polystyrene microplastics under simulated sunlight. The study found that both dissolved organic matter and microplastics enhanced tetracycline breakdown, but humic acid had the most pronounced accelerating effect regardless of whether microplastics were present.
Characteristics of microplastic-derived dissolved organic matter and its binding with pharmaceuticals unveiled by fluorescence spectroscopy and two-dimensional correlation spectroscopy
Researchers characterized dissolved organic matter released by microplastics during UV-driven aging and examined how it interacts with pharmaceutical compounds. They found that aged polyethylene terephthalate and polystyrene microplastics release fluorescent organic substances that can bind with antibiotics like chloramphenicol and carbamazepine. The study suggests that microplastic degradation byproducts may influence the environmental fate and transport of pharmaceutical pollutants in water.
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.
[Characteristics of Microplastic-derived Dissolved Organic Matter(MPDOM) and the Complexation Between MPDOM and Sulfadiazine/Cu2].
This study examined dissolved organic matter released from aging PET and polystyrene microplastics and found that it can bind to both sulfadiazine (an antibiotic) and copper ions, potentially altering how these contaminants move through the environment. Aging microplastics release chemical compounds that interact with other pollutants, complicating the environmental behavior of both plastic and non-plastic contaminants in water and soil.
Copper-binding properties of microplastic-derived dissolved organic matter revealed by fluorescence spectroscopy and two-dimensional correlation spectroscopy
Dissolved organic matter (DOM) leached from different types of microplastics was characterized for its ability to bind copper ions, using fluorescence spectroscopy. Microplastic-derived DOM showed significant copper-binding capacity that varied by polymer type, suggesting that microplastic leachate can influence heavy metal speciation and bioavailability in aquatic environments.
Adsorption and desorption mechanisms of oxytetracycline on poly(butylene adipate-co-terephthalate) microplastics after degradation: The effects of biofilms, Cu(II), water pH, and dissolved organic matter
Researchers found that biodegradation significantly increases the ability of poly(butylene adipate-co-terephthalate) (PBAT) microplastics to adsorb the antibiotic oxytetracycline, and that the presence of copper ions further amplifies this adsorption, raising concerns about how degrading biodegradable plastics transport pharmaceutical contaminants.
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.
Photo-induced leaching behaviors and biodegradability of dissolved organic matter from microplastics and terrestrial-sourced particles
Researchers studied how light exposure causes microplastics and terrestrial particles to leach dissolved organic matter, and how this leachate behaves in the environment. The study found differences in the biodegradability of leachate from plastic versus natural sources, suggesting that microplastic-derived organic matter may persist differently in aquatic ecosystems.
Insights into the photosensitivity and photobleaching of dissolved organic matter from microplastics: Structure-activity relationship and transformation mechanism
This study investigated the photosensitivity and photobleaching behavior of dissolved organic matter released from microplastics (MPDOM), examining how physicochemical properties of different plastics influence photoactivation and transformation. The structure-activity analysis revealed that MPDOM composition strongly determines its photoreactivity, affecting how microplastic-derived organic compounds interact with sunlight and generate reactive oxygen species in aquatic environments.
Photochemical reactivity of water-soluble dissolved organic matter from microplastics and microfibers
When microplastics and microfibers sit in water, they leach dissolved organic matter (DOM) that can react with sunlight to produce reactive chemicals. This study found that the type and amount of DOM released depends heavily on polymer chemistry, with aromatic plastics like PET and polystyrene releasing more light-absorbing DOM, and microfibers releasing more DOM overall than microplastic particles. Understanding how plastic-derived DOM breaks down in sunlight is important because these chemical by-products can interact with other aquatic pollutants and affect aquatic ecosystems in ways not yet fully understood.
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.
Heavy metals trigger distinct molecular transformations in microplastic-versus natural-derived dissolved organic matter
This study compared how heavy metals interact with organic matter that comes from natural sources versus organic matter released by degrading microplastics in water. Natural organic matter formed stable complexes that kept heavy metals in check, while microplastic-derived organic matter formed weaker bonds and was more vulnerable to chemical reactions that could release metals back into the water. This means that as plastic pollution increases, heavy metals in waterways may become more mobile and more available to enter the food chain.
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.
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.
Insight into the dynamic transformation properties of microplastic-derived dissolved organic matter and its contribution to the formation of chlorination disinfection by-products
Researchers studied how dissolved organic matter released from microplastics transforms under UV light and how it contributes to the formation of harmful disinfection byproducts during water chlorination. They found that UV exposure changed the chemical composition of the microplastic-derived organic matter, affecting its reactivity during disinfection. The findings suggest that microplastics in water sources may indirectly increase the formation of potentially harmful chemicals during standard water treatment.
Deciphering the interaction of sulfamethoxazole with biodegradable versus conventional, virgin versus aged microplastics in aquatic environment
Researchers compared how biodegradable and conventional microplastics interact with the antibiotic sulfamethoxazole in water, both before and after UV aging. They found that biodegradable polylactic acid microplastics had the highest capacity to absorb the antibiotic, and that aging generally increased absorption for all plastic types. The study suggests that microplastics in waterways may act as carriers for pharmaceutical pollutants, with biodegradable plastics potentially posing a greater transport risk than conventional ones.
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.
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.
Characterization of microplastic-derived dissolved organic matter in freshwater: Effects of light irradiation and polymer types
Researchers examined how different types of microplastics release dissolved organic matter into freshwater under light and dark conditions. They found that polypropylene released the most organic compounds after UV exposure, while protein-like substances were the main material released by most plastics in the dark. The study indicates that microplastics may have ongoing, long-term effects on water chemistry and microbial activity in natural water bodies.
Microplastic-derived dissolved organic matter and its biogeochemical behaviors in aquatic environments: A review
This review examines how microplastics release dissolved organic matter (MP-DOM) as they break down in water, and how these released chemicals affect water ecosystems. MP-DOM can interact with other pollutants and alter carbon cycling in natural waters, with the type and amount varying based on plastic composition and weathering conditions. Understanding what microplastics release into water as they degrade is important because these dissolved chemicals may have their own toxic effects on aquatic life and water quality.
Combined pollution of tetracyclines and microplastics in the aquatic environment: Insights into the occurrence, interaction mechanisms and effects
This review examines how microplastics and tetracycline antibiotics interact in water environments, since microplastics can absorb and carry antibiotics on their surfaces. Factors like pH, heavy metals, and organic matter in water influence how tightly antibiotics bind to microplastics, and the combined pollution is more harmful to aquatic life than either pollutant alone. This is relevant to human health because these microplastic-antibiotic combinations can enter drinking water supplies and promote antibiotic resistance.