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 Aging of polystyrene microplastics by UV/Sodium percarbonate oxidation: Organic release, mechanism, and disinfection by-product formation
ClearThe Aging Behavior of Polyvinyl Chloride Microplastics by UV/Sodium Percarbonate Oxidation: Efficiency and Mechanism
Researchers investigated how UV-activated sodium percarbonate breaks down PVC microplastics, finding effective dechlorination and fragmentation after 35 hours of treatment. The study identified hydroxyl and carbonate radicals as the primary agents driving the aging process, providing insights into how advanced oxidation could be used to treat microplastic-contaminated wastewater.
Effects of UV light on physicochemical changes in thermoplastic polyurethanes: Mechanism and disinfection byproduct formation
Researchers examined how UV light exposure changes the properties of thermoplastic polyurethane microplastics in water and whether those changes affect the formation of harmful disinfection byproducts during water chlorination. They found that UV exposure broke the plastic into smaller fragments and released soluble chemicals that significantly increased byproduct formation after chlorination. The findings suggest that aging microplastics in water systems could contribute to the creation of potentially harmful chemicals during standard water treatment.
UV aging of microplastic polymers promotes their chemical transformation and byproduct formation upon chlorination
Researchers studied how UV aging of different microplastic polymers affects their behavior during water chlorination treatment. They found that UV aging significantly increased the reactivity of polyamide and polyester microplastics, promoting the release of harmful organic compounds and the formation of disinfection byproducts by more than 10-fold. The study reveals that weathered microplastics in drinking water systems may generate more toxic byproducts during standard chlorination than their pristine counterparts.
Effects of polystyrene microplastics on the breakthrough behavior of dissolved organic matter in carbon filtration column
Polystyrene microplastics can interfere with the performance of activated carbon water filters — a widely used step in drinking water treatment. This study found that when microplastics are present, they compete with humic acid (a natural organic compound) for adsorption sites on the carbon, causing more humic acid to pass through the filter — which in turn can increase formation of harmful disinfection byproducts when the water is subsequently chlorinated. The effect changes when microplastics have been weathered by UV light, making the interactions in real-world water treatment even more complex than previously understood.
Impact of non-aged and UV-aged microplastics on the formation of halogenated disinfection byproducts during chlorination of drinking water and its mechanism
Researchers investigated how both new and UV-aged microplastics affect the formation of halogenated disinfection byproducts during chlorine treatment of drinking water. They found that non-aged microplastics reduced byproduct formation by adsorbing organic precursors, while UV-aged microplastics had a much smaller reduction effect because they release organic compounds that offset adsorption. The study reveals that environmental aging of microplastics changes their impact on drinking water treatment chemistry in important ways.
Effects of photochlorination on the physicochemical transformation of polystyrene nanoplastics: Mechanism and environmental fate
Researchers studied how sunlight combined with chlorine in water treatment changes the properties of polystyrene nanoplastics. They found that solar irradiation significantly accelerated the chemical breakdown of the nanoplastics, including surface oxidation and the release of organic compounds. The study reveals that nanoplastics leaving wastewater treatment plants undergo rapid transformation in the environment, which could alter both their fate and toxicity.
Unveiling the optical and molecular characteristics of aging microplastics derived dissolved organic matter transformed by UV/chlor(am)ine oxidation and its potential for disinfection byproducts formation
Researchers studied how UV light and common water disinfection chemicals break down microplastics in water and found that different treatment methods produce different types of dissolved organic matter from the plastic. Some treatment combinations, particularly UV with chlorine, created byproducts that could form harmful disinfection byproducts when water is later chlorinated. This is important because it means water treatment processes might unintentionally create new toxic compounds from the microplastics already present in water.
Volatile organic compounds generation pathways and mechanisms from microplastics in water: Ultraviolet, chlorine and ultraviolet/chlorine disinfection
Researchers examined how UV, chlorine, and combined UV/chlorine disinfection treatments cause microplastics to release volatile organic compounds, identifying distinct degradation pathways for polypropylene, polystyrene, and PVC that generate diverse chemical byproducts in treated water.
Microplastic removal from urban stormwater: Current treatments and research gaps
Researchers investigated the phototransformation of polystyrene microplastics under simulated solar radiation, finding surface oxidation and formation of carbonyl groups after UV exposure. Photo-aged particles showed increased release of dissolved organic carbon and greater toxicity to marine copepods.
Dissolved Organic Matter Promotes the Aging Process of Polystyrene Microplastics under Dark and Ultraviolet Light Conditions: The Crucial Role of Reactive Oxygen Species
Researchers found that dissolved organic matter commonly present in natural water environments accelerates the aging and degradation of polystyrene microplastics under both dark and ultraviolet light conditions. The study identified reactive oxygen species as the crucial driver of this aging process, with fulvic acid showing a stronger effect than humic acid due to its greater ability to generate semiquinone radicals.
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.
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.
Photochemical transformation of microplastics-derived dissolved organic matter altered the photoaging of microplastics
Researchers investigated how dissolved organic matter released from different microplastics (polystyrene, polyethylene, and biodegradable PBAT) affects the aging of polystyrene microplastics under UV irradiation, finding that PBAT-derived organic matter most strongly accelerated plastic photoaging.
UV-photoaging behavior of polystyrene microplastics enhanced by thermally-activated persulfate
Researchers found that thermally-activated persulfate combined with UV irradiation significantly accelerated the photoaging of polystyrene microplastics, increasing surface cracking, size reduction, and contaminant adsorption capacity while generating more toxic aging byproducts.
Leaching of organic matter from microplastics and its role in disinfection by-product formation
Researchers found that microplastics leach organic matter into water that subsequently acts as a precursor for disinfection by-products during chlorination, with polystyrene MPs generating the most leachate and producing the most by-products compared to polyethylene MPs.
Degradation of Polystyrene Nanoplastics in UV/NaClO and UV/PMS Systems: Insights into Degradation Efficiency, Mechanism, and Toxicity Evaluation
Researchers tested two advanced oxidation methods for breaking down polystyrene nanoplastics in water and found that while both effectively reduced water cloudiness, neither completely destroyed the plastic particles. The UV/PMS system achieved about 29% mineralization compared to only 7% for UV/NaClO, though both generated some toxic byproducts. The study suggests that advanced oxidation processes show promise for nanoplastic removal from water but require further optimization to achieve complete degradation.
Wastewater preinteraction accelerates the photoaging of disposable box-derived polystyrene microplastics in water
Researchers found that pre-exposure of polystyrene microplastics to real wastewater significantly accelerated their subsequent photoaging under UV light — doubling oxidation rates — with fulvic acid identified as the primary wastewater constituent driving this enhancement.
Insight into the characteristics and sorption behaviors of aged polystyrene microplastics through three type of accelerated oxidation processes
Researchers studied how three different UV-based oxidation processes age polystyrene microplastics and how that aging affects the particles' ability to absorb the chemical bisphenol A. They found that aging significantly increased the surface oxidation and water-attracting properties of the microplastics, altering their pollutant-sorbing behavior. The findings suggest that weathered microplastics in the environment may interact with chemical contaminants differently than fresh ones.
Molecular characteristics and plastic additives in dissolved organic matter derived from polystyrene microplastics: Effects of cumulative irradiation and microplastic concentrations
This study investigated how ultraviolet light breaks down polystyrene microplastics and releases dissolved organic matter, including plastic additives, into the surrounding water. Greater UV exposure produced more complex chemical mixtures with higher levels of potentially toxic compounds. The findings are important because sunlight-driven breakdown of microplastics in the environment may release harmful chemicals into water sources that people use for drinking and recreation.
Insight into the chemical transformation and organic release of polyurethane microplastics during chlorination
Scientists investigated what happens to polyurethane microplastics during water chlorination, a standard step in water treatment. They found that chlorination breaks down the plastic surface and releases organic chemicals, especially from UV-weathered particles, which produced significantly more leached compounds. The findings suggest that water treatment processes themselves may inadvertently release harmful byproducts from microplastics.
Influence of aging on the affinity between microplastics and organic contaminants
Researchers investigated how UV and UV+H2O2 aging affects the capacity of polystyrene microplastics to adsorb and release pesticides and other organic contaminants, finding that aging-induced surface changes significantly altered adsorption affinity and desorption behavior compared to unaged controls.
Effects of UV-based oxidation processes on the degradation of microplastic: Fragmentation, organic matter release, toxicity and disinfection byproduct formation
This study examined how UV-based water treatment processes break down microplastics, finding that while the treatments fragment the plastics into smaller pieces, they also release potentially toxic organic compounds. The smaller fragments and released chemicals may actually pose greater risks than the original microplastics. This is an important finding because it suggests that some water purification methods could unintentionally make microplastic pollution more hazardous to human health.
Effect of ozonation on the morphological characteristics and adsorption behavior of polystyrene microplastics in aqueous environments
Researchers exposed polystyrene microplastics to ozone treatment and found that the aging process made the particles smaller, more negatively charged, and better at absorbing pollutants from water — meaning weathered microplastics in the environment may carry more harmful chemicals than fresh ones.
Releasing characteristics of toxic chemicals from polystyrene microplastics in the aqueous environment during photoaging process
This study revealed that as polystyrene microplastics age under UV light, they release a growing number of toxic chemicals including organic compounds and heavy metals into surrounding water. The rate of chemical release increased dramatically with aging time, meaning that weathered microplastics in the environment are more chemically hazardous than fresh ones, with implications for water quality and human exposure.