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20 resultsShowing papers similar to Aging of PS/PVC by UV-Fenton reaction and their potential photodegradation driven in the goethite/haematite constructed wetlands
ClearAging of PS/PVC by UV-Fenton reaction and their potential photodegradation driven in the goethite/haematite constructed wetlands
Researchers investigated the UV-Fenton-driven photodegradation of polystyrene and polyvinyl chloride microplastics in simulated constructed wetlands with goethite and haematite, finding that the Fenton reaction significantly accelerated weight loss (28.3% for PS and 35.6% for PVC) compared to UV alone, with hydroxyl radicals identified as the primary degradation mechanism and enhanced microbial activity observed toward polycyclic aromatic hydrocarbon breakdown products.
Aging of PS/PVC by UV-Fenton reaction and their potential photodegradation driven in the goethite/haematite constructed wetlands
Researchers investigated the UV-Fenton-driven photodegradation of polystyrene and polyvinyl chloride microplastics in simulated constructed wetlands with goethite and haematite, finding that the Fenton reaction significantly accelerated weight loss (28.3% for PS and 35.6% for PVC) compared to UV alone, with hydroxyl radicals identified as the primary degradation mechanism and enhanced microbial activity observed toward polycyclic aromatic hydrocarbon breakdown products.
The photodegradation processes and mechanisms of polyvinyl chloride and polyethylene terephthalate microplastic in aquatic environments: Important role of clay minerals
Researchers found that clay minerals like kaolinite and montmorillonite play an important role in the photodegradation of PVC and PET microplastics in aquatic environments, either accelerating or modifying UV-driven weathering processes.
Characteristics analysis of plastisphere biofilm and effect of aging products on nitrogen metabolizing flora in microcosm wetlands experiment
Researchers placed three types of plastic in miniature constructed wetlands for 180 days and tracked how they aged and affected microbial communities. The plastics degraded at different rates, with PVC developing new chemical groups and all surfaces becoming less water-repellent as bacteria colonized them. The plastic surfaces altered nitrogen-processing bacteria in the wetland water, suggesting microplastics can disrupt nutrient cycling in natural wetland ecosystems.
Photoaging of Polyvinyl Chloride and Polystyrene Under UVA Radiation in Diverse Environmental Conditions
Researchers exposed polyvinyl chloride and polystyrene plastics to UVA radiation under diverse environmental conditions and tracked their photoaging and fragmentation, finding that UVA exposure accelerates microplastic generation in ways that vary with environmental context.
Aging of Microplasticsacross a Constructed Wetland
Researchers tracked the aging of five microplastic polymer types — LDPE, HDPE, polypropylene, polystyrene, and PET — across four habitats within a wastewater constructed wetland over 18 months, finding that physical, chemical, and biological processes jointly drive weathering and microorganism colonisation of plastics in these treatment systems.
Photochemistry of microplastics-derived dissolved organic matter: Reactive species generation and organic pollutant degradation
Researchers investigated how dissolved organic matter released from degrading polystyrene and PVC microplastics behaves when exposed to sunlight in water. They found that sunlight breaks down the aromatic compounds in this plastic-derived material and generates reactive chemical species, though at lower rates than natural organic matter. Despite this, these reactive species significantly accelerated the breakdown of co-existing pollutants, suggesting that degrading microplastics may act as unexpected natural catalysts in aquatic environments.
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.
Accelerated aging of polyvinyl chloride microplastics by UV irradiation: Aging characteristics, filtrate analysis, and adsorption behavior
Researchers systematically investigated how UV irradiation ages polyvinyl chloride microplastics, characterizing changes in their physical and chemical properties and the organic matter they release. The study established quantitative relationships between the degree of aging and the capacity of microplastics to adsorb environmental pollutants like malachite green and sulfamethoxazole, providing a tool for predicting contaminant accumulation on weathered microplastics in natural environments.
Enhancement of photodegradation of polyethylene with adsorbed polycyclic aromatic hydrocarbons under artificial sunlight irradiation
Researchers showed that polycyclic aromatic hydrocarbons (PAHs) adsorbed onto polyethylene plastic act as photocatalysts that accelerate the photodegradation of the plastic in marine environments, increasing microplastic production from plastic waste contaminated with hydrophobic organic pollutants.
Photo-aging of polyvinyl chloride microplastic in the presence of natural organic acids
Researchers described a new photo-aging pathway for polyvinyl chloride microplastics in aquatic environments involving low-molecular-weight organic acids. The study found that natural organic acids and their iron complexes significantly accelerated the degradation of PVC microplastics under sunlight through hydroxyl radical generation, revealing how environmental conditions influence microplastic weathering.
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.
Linking UV aging of polymers and microplastics formation: An assessment employing various characterization techniques
Researchers examined the link between UV aging of plastic polymers and the generation of microplastics in marine environments, using environmental assessment tools to model the process. The study clarifies how photodegradation rates and polymer type influence the rate and quantity of microplastic formation.
Effect of weathering on the release of secondary microplastic fragments and dissolved organics from microplastics
Researchers systematically investigated how different weathering conditions affect the release of secondary microplastics and dissolved organic carbon from PVC, polyethylene, and biodegradable PBAT plastics. The study found that biodegradable PBAT released the highest amounts of secondary particles and organic carbon, and that combined UV and mechanical aging produced the most significant degradation, enhancing particle release by up to 72% compared to either method alone.
Linking UV aging of polymers and microplastics formation: An assessment employing various characterization techniques
This study used environmental assessment tools to model how UV aging of plastic polymers drives microplastic formation in marine environments. The analysis identified polymer-specific degradation rates and environmental conditions that accelerate the conversion of plastic debris into microplastics.
Aging of Microplastics across a Constructed Wetland
Researchers studied the weathering and microbial colonization of five microplastic polymer types over 18 months within four habitat zones of a constructed wastewater wetland, finding that microorganisms colonized plastics rapidly and that weathering rates varied by polymer type and habitat.
Photoaging mechanisms of microplastics mediated by dissolved organic matter in an iron-rich aquatic environment
Researchers investigated how dissolved organic matter and iron mediate the photoaging of PVC and PET microplastics, finding that humic acid and iron accelerate surface degradation and alter the environmental behavior and risks of aged microplastics.
The UltravioletIrradiation Aging Characteristicsof Microplastics in Soil under the Action of Biochar
Researchers investigated how biochar application at four concentrations affects UV-induced aging of both persistent polyethylene microplastics and biodegradable PBAT microplastics in soil, finding that biochar modulates the aging behavior and physicochemical transformation of microplastics under ultraviolet irradiation.
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.
Solar light photodegradation of nicotine in the presence of aged polystyrene microplastics
Researchers investigated whether aged polystyrene microplastics can facilitate the solar photodegradation of nicotine, a widespread emerging contaminant, using polystyrene as a model substrate. Results showed that UV-weathered microplastics acted as photosensitizers, accelerating nicotine degradation under sunlight and producing reactive species that enhanced the process.