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61,005 resultsShowing papers similar to Hydroxyl Radical Generation in Heterogeneous Fenton Reaction and Its Interaction with Nanoplastics as Potential Advanced Oxidation Process
ClearPhoto-fenton oxidation of microplastics: Impact of polymer nature
Researchers investigated photo-Fenton oxidation as a treatment for microplastics, finding that degradation efficiency varies significantly by polymer type. Polymers with aromatic structures and those with greater oxidative susceptibility degraded more rapidly under photo-Fenton conditions.
Catalytic degradation of microplastics
This review summarizes catalytic approaches for degrading microplastics in the environment, covering photocatalysis, Fenton reactions, and other advanced oxidation methods, and evaluates their current effectiveness and limitations for addressing real-world microplastic contamination.
Liberation of plastic nanoparticles and organic compounds from three common plastics in water during weathering under UV radiation-free conditions
Researchers conducted a 620-day weathering experiment on PET, PP, and ABS plastics in water with and without reactive oxygen species, finding that hydroxyl radicals from Fenton-like reactions significantly enhanced nanoplastic generation and release of over 30 organic compounds including potentially toxic plastic additive-derived pollutants, with PET releasing the greatest total organic carbon.
Enhancing Microplastic Degradation through Synergistic Photocatalytic and Pretreatment Approaches
Researchers developed a combined photocatalytic and hydrothermal pretreatment approach for degrading PET microplastics. They found that pretreating PET microplastics before photocatalysis improved degradation efficiency by nearly 7 to 9 times compared to untreated particles. The enhanced performance was attributed to increased surface porosity and hydrophilicity of the pretreated microplastics, with hydroxyl radicals identified as the primary driver of degradation.
Photo-fenton oxidation of microplastics: Impact of polymer nature
Researchers tested photo-Fenton oxidation as a treatment method for microplastics, comparing degradation efficiency across different polymer types. The study found that polymer chemistry significantly influences how quickly microplastics break down under this oxidative treatment.
Pristine and UV-Weathered PET Microplastics as Water Contaminants: Appraising the Potential of the Fenton Process for Effective Remediation
Researchers evaluated the Fenton process for removing both pristine and UV-weathered PET microplastics from water. The study found that the treatment was effective but that weathered microplastics behaved differently than pristine ones, highlighting the need to account for environmental aging when developing microplastic remediation strategies.
Molecular Oxygen Activation by Citric Acid Boosted Pyrite–Photo–Fenton Process for Degradation of PPCPs in Water
Researchers developed a pyrite-based photo-Fenton process enhanced with citric acid that activates molecular oxygen without needing added hydrogen peroxide, enabling cost-effective degradation of polypropylene plastic and organic pollutants under natural sunlight.
Heterogeneous Catalytic Peroxide Oxidation Inducing Surface Reactions Toward Flotation Extraction of Hazardous Poly(Vinyl Chloride) From Waste Plastics
Researchers proposed using heterogeneous Fenton reactions catalyzed by green tea extract-reduced iron nanoparticles to selectively modify the wettability of poly(vinyl chloride) in mixed plastic waste streams, enabling its separation by froth flotation. They demonstrated that hydroxyl radicals generated in the iron nanoparticle and hydrogen peroxide system oxidized PVC surfaces, improving flotation separation efficiency and offering a greener approach to hazardous plastic recycling.
Advanced Oxidation Techniques and Hybrid Approaches for Microplastic Degradation: A Comprehensive Review
This review examines advanced oxidation processes for degrading microplastics, including photocatalysis, electrochemical oxidation, Fenton reactions, and plasma technologies, which generate reactive species capable of breaking down polymer chains. Hybrid systems combining these oxidation methods with biological treatments or membrane filtration showed particular promise for scalable microplastic remediation. The authors identify challenges around energy consumption, secondary pollutant formation, and the need for optimization before these technologies can be integrated into existing wastewater treatment infrastructure.
The Photo-Fenton Method Aids Microplastic Degradation: Experimental Findings Highlight Significant Differences Among Plastic Types
Researchers tested Fenton-based oxidation methods on three common microplastics (LDPE, PP, PVC) under varying acidity, iron, and hydrogen peroxide conditions, finding that Photo-Fenton is highly effective for LDPE and promising for PVC, but that PP is resistant to all Fenton-based treatments.
Application of Fenton-like processes in the degradation of microplastics
This Croatian-language paper reviews how Fenton-like advanced oxidation processes can degrade microplastics in the environment. The review evaluates the effectiveness of these chemical methods as a potential tool for breaking down plastic particles in water treatment systems.
Insights in photocatalytic/Fenton-based degradation of microplastics using iron-modified titanium dioxide aerogel powders
This review assessed photocatalytic and Fenton-based degradation approaches for breaking down microplastics, focusing on iron-based catalysts activated by light or hydrogen peroxide. The study found these advanced oxidation processes can fragment microplastics but complete mineralization remains challenging.
Potential of Advanced Oxidation as Pretreatment for Microplastics Biodegradation
This review assessed the potential of advanced oxidation processes as pretreatment steps to enhance microplastic biodegradation, finding that UV, ozone, and Fenton-based treatments can weaken polymer structures and make them more susceptible to subsequent biological breakdown.
Effects of Fe3O4 NMs based Fenton-like reactions on biodegradable plastic bags in compost: New insight into plastisphere community succession, co-composting efficiency and free radical in situ aging theory
Researchers found that adding iron oxide nanoparticles to food waste compost created Fenton-like reactions that generated hydroxyl radicals, broke down biodegradable plastic bags by 39% in molecular weight within 40 days, and enriched plastisphere microorganisms — while also improving compost maturity and reducing greenhouse gas emissions.
Innovations in chemical degradation technologies for the removal of micro/nano-plastics in water: A comprehensive review
This review summarizes advances in chemical degradation technologies for removing micro- and nanoplastics from water, including photocatalysis, Fenton-based reactions, electrochemical oxidation, and micro/nanomotor approaches. Researchers analyzed the key factors that influence degradation effectiveness, such as particle properties and operating conditions. The study identifies current challenges and outlines future directions for developing practical chemical methods to address plastic pollution in water systems.
Recent advances and challenges in advanced oxidation processes for degradation of nano- and microplastics in water: a critical review
This critical review evaluates four main advanced oxidation processes — ozonation, photocatalysis, Fenton reactions, and electrochemical oxidation — for breaking down nano- and microplastics in water, summarizing what has been achieved and where major technical gaps remain. Developing effective degradation technologies is urgently needed because conventional water treatment systems do not reliably remove small plastic particles.
Sustainable Remediation of Polyethylene Microplastics via a Magnetite-Activated Electro-Fenton System: Enhancing Persulfate Efficiency for Eco-Friendly Pollution Mitigation
Researchers developed a new water treatment system combining electro-Fenton technology with magnetite-activated persulfate to break down polyethylene microplastics. The system achieved over 78% removal of microplastics while being more environmentally friendly than conventional chemical methods. This type of advanced treatment technology could help remove microplastics from drinking water and wastewater, reducing human exposure.
Process analysis of microplastic degradation using activated PMS and Fenton reagents
Researchers demonstrated that activated peroxymonosulfate and Fenton reagents can degrade nylon and polystyrene microplastics through free radical oxidation, achieving mass losses exceeding 20% after four treatment cycles.
The photochemical behaviors of microplastics through the lens of reactive oxygen species: Photolysis mechanisms and enhancing photo-transformation of pollutants
This review re-examines the photochemical degradation mechanisms of microplastics through the lens of reactive oxygen species, identifying defects in the traditional autoxidation model and exploring how microplastics can enhance the photo-transformation of co-existing pollutants.
Rapid activation of microplastics by microwave heating in an aqueous phase: A novel approach for enhanced plastic recycling
Microwave heating was used to rapidly activate microplastics by partial oxidation, enhancing their subsequent degradation in catalytic wet peroxide oxidation (CWPO) processes. Graphite particles and hydrogen peroxide during microwave treatment boosted MP reactivity, with aliphatic plastics activating more effectively than aromatic ones.
Electrochemical degradation of nanoplastics in water: Analysis of the role of reactive oxygen species
Researchers investigated electrochemical methods for degrading nanoplastics in water and analyzed the role of different reactive oxygen species in the process. They found that the electro-peroxidation process was about 2.6 times more effective than standard electrooxidation, achieving up to 86.8% nanoplastic degradation under optimized conditions. The study presents a promising advanced treatment approach for addressing nanoplastic contamination in water.
Advanced oxidation processes for the elimination of microplastics from aqueous systems: Assessment of efficiency, perspectives and limitations
This review evaluates advanced oxidation processes as a strategy for breaking down microplastics in water systems, comparing techniques such as photocatalysis, Fenton reactions, and ozonation. Researchers found that while these methods show promise for degrading microplastics into smaller, less harmful molecules, challenges remain in scaling them for practical use. The study identifies key limitations and suggests directions for making these technologies more efficient and applicable to real-world water treatment.
Enhanced degradation of microplastics during sludge composting via microbially-driven Fenton reaction
Researchers demonstrated that microbially-driven Fenton reactions during sludge composting can significantly enhance microplastic degradation, with hydroxyl radicals generated by iron-reducing bacteria accelerating the breakdown of plastic particles in composting environments.
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.