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61,005 resultsShowing papers similar to Aging and Transformation of Polyethylene Microplasticsin UASB Effluents Treated with O3 and O3/H2O2: Physicochemical Changes and Toxicity Assessment
ClearComparison of surficial modification of micro-sized polyethylenein between by UV/O3 and UVO submerged system
Researchers compared ozone and UV oxidation methods for chemically modifying the surface of polyethylene microplastics in water, finding that different treatment combinations create distinct surface changes. Understanding how weathering alters microplastic surfaces is important for predicting their environmental behavior and toxicity.
Ozonation facilitates the aging and mineralization of polyethylene microplastics from water: Behavior, mechanisms, and pathways
Ozonation was shown to accelerate the aging and partial mineralization of polyethylene microplastics, with surface oxidation creating more reactive particles susceptible to further degradation. The study provides mechanistic insight into how advanced oxidation processes could contribute to microplastic breakdown in water treatment.
Estudo da degradação de microplásticos em água e efluente secundário de estação de tratamento de esgoto por processos baseados em ozônio
This Brazilian study tested ozone-based water treatment processes for degrading polyethylene microplastics in both clean water and secondary wastewater effluent. While ozonation could break down microplastics into smaller fragments and dissolved organic carbon, it did not fully eliminate them, suggesting the need for combined treatment approaches.
Tertiary/quaternary treatment of urban wastewater by UV/H2O2 or ozonation: Microplastics may affect removal of E. coli and contaminants of emerging concern
Researchers investigated how polyethylene microplastics interfere with UV/hydrogen peroxide and ozonation treatments used to disinfect urban wastewater. They found that increasing microplastic concentrations reduced the effectiveness of both treatment methods at killing E. coli bacteria and degrading pharmaceutical contaminants. The study suggests that microplastic pollution in wastewater could compromise advanced treatment processes designed to protect public health.
The impact of ozonation on PET and PVC microplastics in model urban wastewater
Researchers investigated the effects of 6-hour ozonation treatment on PET and PVC microplastics in model urban wastewater, evaluating ozonation as an advanced oxidation process for microplastic degradation and assessing changes in polymer structure and surface chemistry for both plastic types.
Reactivity of four model microplastics with ozone.
Researchers investigated the reactivity of four model microplastic types with ozone, examining how ozone treatment affects the physicochemical properties of microplastics as a potential water treatment strategy for degrading plastic particles.
Ozone-mediated breakdown of microplastics in aqueous environments
Researchers examined how ozone-based advanced oxidation processes break down microplastics in water treatment settings. They found that while ozone can degrade certain plastics, the effectiveness varies depending on particle size, polymer type, and treatment conditions, and the process may generate nanoplastic byproducts. The study highlights both the promise and limitations of ozone treatment as a strategy for removing microplastics from wastewater.
Ozonation and its Application in Wastewater Treatment
Not relevant to microplastics — this review covers ozonation and catalytic ozonation as wastewater disinfection and organic pollutant degradation technologies, with no focus on microplastic contamination.
The effect of Ozonation on the chemical structure of microplastics
Ozone treatment of microplastics in water caused oxidative changes to polymer surfaces including carbonyl group formation and surface cracking, which altered hydrophobicity and potentially increased the capacity of treated particles to adsorb contaminants, suggesting that ozonation in water treatment may chemically transform rather than eliminate microplastic hazards.
Changes in physical and chemical properties of microplastics by ozonation
Researchers examined how ozone treatment in water systems changes the physical and chemical properties of six common types of microplastics. They found that ozonation altered surface roughness, wettability, and chemical composition of the plastics, with some types being more affected than others. The findings are important because these changes could influence how microplastics interact with other pollutants and organisms in treated water.
Physicochemical changes in microplastics and formation of DBPs under ozonation
Researchers examined physicochemical changes in thermoplastic polyurethane and polyethylene microplastics during ozonation water treatment, finding that the process can alter microplastic morphology and potentially generate disinfection byproducts.
Effects of different oxidants on the behaviour of microplastic hetero-aggregates
Researchers studied how different oxidants (ozone, chlorine, UV) affect the aggregation and settling behavior of microplastics in water treatment, finding that oxidation altered surface chemistry and changed hetero-aggregate formation with natural particles. The results have implications for predicting microplastic removal efficiency in drinking water and wastewater treatment plants.
Effects of Ozonation and Anaerobic Digestion on the Physicochemical Properties of Low-Density Polyethylene, Polypropylene, and Polyamide 66 Microplastics
Scientists tested whether ozone treatment could help break down tiny plastic particles (called microplastics) that build up in wastewater treatment plants. The ozone changed the surface chemistry of the plastics and made them less stable, but didn't actually reduce the amount of plastic particles. This research is important because microplastics from wastewater can end up in our food and water, so finding better ways to remove or break them down could help protect human health.
Transformation of Traditional Wastewater Treatment Methods into Advanced Oxidation Processes and the Role of Ozonation
This paper is not relevant to microplastics research — it reviews advanced oxidation processes with a focus on ozonation for wastewater treatment, covering microbial inactivation and degradation of organic pollutants.
Pre-oxidization-induced change of physicochemical characteristics and removal behaviours in conventional drinking water treatment processes for polyethylene microplastics
Researchers investigated how pre-oxidation treatments alter the physicochemical properties of polyethylene microplastics and found that oxidation changed surface characteristics and influenced removal efficiency during conventional drinking water treatment processes.
Surface modification of polyethylene microplastic particles during the aqueous-phase ozonation process
Researchers examined the surface modification of polyethylene microplastics during aqueous-phase ozonation, finding that increasing ozone dosage and exposure time progressively increased carbonyl and hydroxyl functional groups on the particle surface. FTIR and XPS analysis showed ozonation altered the surface chemistry of polyethylene microplastics in ways that could change their environmental fate and pollutant adsorption capacity.
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.
Research advances of biodegradable microplastics in wastewater treatment plant: Current knowledge and future directions
This review examines how biodegradable plastics break down into microplastics during wastewater treatment and their effects on the treatment process. Biodegradable microplastics can alter microbial communities in treatment systems and carry pollutants on their surfaces due to abundant oxygen-containing chemical groups. The findings challenge the notion that biodegradable plastics are a complete solution to plastic pollution, since they still generate microplastics that could affect water quality and human health.
Microplastics Degradation in Water: A Review of Advanced Oxidative Processes and Ozonation for Effective Treatment
This review examines advanced oxidative processes (AOPs) and ozonation as emerging technologies for degrading microplastics in drinking water and aquatic environments, covering both identification and quantification methods alongside treatment efficacy. The authors assess the challenges and capabilities of these approaches in addressing the growing concern over microplastic contamination in water supplies.
Mineralization characteristics and behavior of polyethylene microplastics through ozone-based treatment
This study investigated ozone-based treatment for removing polyethylene microplastics and found that catalytic ozonation using synthesized alpha-MnO2 and alpha-FeOOH catalysts improved mineralization efficiency compared to ozone alone.
Effective Removal of Microplastics Using a Process of Ozonation Followed by Flocculation with Aluminum Sulfate and Polyacrylamide
Researchers tested a two-step water treatment process combining ozonation with flocculation to remove microplastics. They found that ozone pretreatment roughened the microplastic surfaces and added chemical groups that dramatically improved removal rates, from 40% to 91%, during the subsequent flocculation step. The findings suggest this combined approach could significantly enhance microplastic removal in conventional water treatment plants.
Impact of Chlorine or UV/H2O2 on Microplastics Under Conditions Representative of Drinking Water Treatment
Researchers exposed low- and high-density polyethylene microplastics to chlorine and UV/H2O2 at drinking-water-relevant doses and found that surface changes and cytotoxicity increases reported in earlier studies occurred only at far higher doses than used in practice.
Effects of advanced oxidation processes on leachates and properties of microplastics
Ozonation, Fenton, and heat-activated persulfate treatments were applied to microplastics containing pigment red, finding that all three advanced oxidation processes effectively degraded the released pigment and altered nanoscale surface properties of the treated MPs.
Secondary risks induced by polyethylene microplastics during the disinfection processes of chlorination, UV irradiation, and ozone treatment
Polyethylene microplastics subjected to chlorination, UV irradiation, and ozone treatment at drinking-water-relevant doses showed minimal biotoxicity changes, suggesting that standard disinfection processes do not significantly increase the hazard posed by plastic particles in water.