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61,005 resultsShowing papers similar to Removal of Organic Micropollutants and Microplastics via Ozonation Followed by Granular Activated Carbon Filtration
ClearOzonation 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.
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.
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.
Effects of microplastics on the removal of trace organic compounds during ozonation: Oxidation and adsorption of trace organic compounds and byproducts
Microplastics were found to interfere with the ozonation of trace organic compounds in water treatment, with plastic surfaces adsorbing both target pollutants and ozonation byproducts, potentially reducing treatment effectiveness and creating new exposure pathways.
Comparison of AOP, GAC, and Novel Organosilane-Based Process for the Removal of Microplastics at a Municipal Wastewater Treatment Plant
This study compared three advanced treatment approaches for microplastic removal at a municipal wastewater plant, including advanced oxidation, granular activated carbon, and a novel organosilane-based process, finding that the organosilane method achieved high removal efficiency with practical advantages.
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.
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.
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.
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.
Conventional and biological treatment for the removal of microplastics from drinking water
Researchers examined microplastic removal by a full-scale drinking water treatment plant, finding that conventional coagulation-flocculation-filtration processes and biological filters with granular activated carbon effectively reduced microplastic concentrations in treated water.
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.
Ultrafiltration/Granulated Active Carbon-Biofilter: Efficient Removal of a Broad Range of Micropollutants
A treatment system combining membrane bioreactor ultrafiltration with granulated activated carbon (GAC) biofilter was evaluated for removal of pharmaceutical residues and other micropollutants from wastewater, achieving complete removal of all investigated substances including microplastics. The study identifies this two-stage advanced treatment approach as effective for a broad spectrum of micropollutants currently passing through conventional WWTPs.
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.
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.
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.
Enhancing Microplastics Removal from Wastewater Using Electro-Coagulation and Granule-Activated Carbon with Thermal Regeneration
Combining electrocoagulation with granular activated carbon treatment significantly improved microplastic removal from wastewater compared to standard treatment, achieving removal efficiencies above 95% and offering a feasible enhancement for sewage treatment plants.
Performance of activated carbon for polypropylene microplastic removal in wastewater
Researchers tested the ability of granular activated carbon to remove polypropylene microplastics from wastewater and found it could capture over 90 percent of particles under optimized conditions. The carbon's effectiveness depended on factors like particle size, contact time, and water chemistry. The study supports activated carbon adsorption as a practical and efficient add-on treatment step for removing microplastics from water treatment systems.
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.
Effects of microplastics on water disinfection and formation of disinfection by-products
This review examines how the presence of microplastics in drinking water and wastewater interferes with chlorination and ozonation disinfection processes, potentially reducing their effectiveness and generating harmful disinfection by-products. Microplastics can leach dissolved organic carbon that reacts with disinfectants, and they serve as refuges for antibiotic-resistant bacteria that may survive standard treatment. The authors call for more realistic laboratory experiments and field studies to properly assess the real-world risks that microplastics pose inside water treatment plants.
Occurrence and removal of microplastics by advanced and conventional drinking water treatment facilities
Researchers assessed microplastic occurrence and removal efficiency at drinking water treatment plants using both conventional and advanced treatment processes. Advanced treatment steps such as ultrafiltration and activated carbon significantly improved microplastic removal compared to conventional coagulation and filtration alone.
Effects of a Granular Activated Carbon Bed Coupled with a Membrane Filtration Process on the Treatment Characteristics of Microplastics in Sewer Pipes
Researchers analyzed the behavior of microplastics in combined sewage overflow treatment using a granular activated carbon (GAC) bed coupled with membrane filtration (MF) in sewer pipe systems. The study evaluated removal efficiency under real rainfall conditions averaging 13.5 mm precipitation over 9.1 hours, characterizing how hazardous substances associated with diverse microplastic sources accumulate and are treated in the combined system.
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.
Removal of Microplastics in a Hybrid Treatment Process of Ceramic Microfiltration and Photocatalyst-Mounted PES Spheres with Air Backwashing
Researchers developed a hybrid water treatment system combining ceramic microfiltration with photocatalyst-coated spheres and air backwashing to remove microplastics and organic matter. The combined system achieved higher removal rates for both microplastics and dissolved organic compounds than any single treatment method alone. The study demonstrates a promising approach for upgrading existing water treatment facilities to better handle microplastic contamination.
Advanced Treatment of Laundry Wastewater by Electro-Hybrid Ozonation–Coagulation Process: Surfactant and Microplastic Removal and Mechanism
Researchers found that an electro-hybrid ozonation-coagulation process achieved over 90% removal of both surfactants and microplastics from laundry wastewater under optimized conditions, with hydroxyl radical generation identified as the key mechanism driving contaminant breakdown.