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Papers
20 resultsShowing papers similar to From Macro to Micro Plastics; Influence of Photo-oxidative Degradation
ClearEnvironmental Degradation and Fragmentation of Microplastics: Dependence on Polymer Type, Humidity, UV Dose and Temperature
A systematic study of UV dose, humidity, and temperature effects on six polymer types found that photo-oxidation is the primary driver of microplastic fragmentation and release of secondary nano-sized particles, with the relationship between weathering conditions and fragmentation rates varying by polymer type.
Study on the impact of photoaging on the generation of very small microplastics (MPs) and nanoplastics (NPs) and the wettability of plastic surface
Experiments using UV light to artificially age six common plastic types showed that sunlight (photoaging) accelerates the breakdown of plastics into very small microplastics and nanoplastics and makes plastic surfaces rougher and more chemically reactive. Understanding how different polymer structures respond to light aging is important for predicting which plastics will fragment fastest in the environment and generate the most hazardous small particles.
Progress on the photo aging mechanism of microplastics and related impact factors in water environment
This review examined the photo-aging mechanisms of microplastics in aquatic environments, finding that solar UV radiation drives oxidation reactions that alter surface chemistry, fragment particles further, and enhance their capacity to adsorb and release co-occurring pollutants.
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.
Developing environmentally relevant test materials for microplastic research through UV-induced photoaging
Researchers used UV irradiation to create photoaged microplastics from multiple polymer types as environmentally relevant test materials for ecotoxicology research, characterizing how aging changes surface chemistry, particle size distribution, and potential biological effects.
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.
UVA-induced weathering of microplastics in seawater: surface property transformations and kinetics
Researchers studied how UVA radiation weathers microplastics in seawater, examining changes to surface properties and degradation rates. The study developed a model integrating an aging index with degradation kinetics, finding that UV exposure significantly transforms microplastic surface characteristics, which affects their behavior and potential ecological impact in marine environments.
Investigation of Surface Alteration of Microplastics by Using UV Irradiation
UV radiation causes polystyrene and other plastic microparticles to undergo photooxidative degradation, changing their surface chemistry and potentially making them more likely to adsorb or release chemical pollutants. Understanding these weathering processes is important for predicting the environmental behavior and toxicity of microplastics.
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.
Влияние ультрафиолетового излучения на фрагментацию полимеров в водной среде
This review examines how UV radiation drives polymer fragmentation in aquatic environments through autocatalytic thermal oxidation initiated by solar radiation, which combined with wind and mechanical stress causes molecular chain scission. The authors also discuss how prior UV aging accelerates subsequent mechanical fragmentation, providing a mechanistic framework for understanding microplastic generation from larger plastic items in water.
Degradation and Fragmentation of Microplastics
This review examines the degradation and fragmentation mechanisms that generate secondary microplastics from ocean plastic debris, covering photo-oxidation chemistry, environmental weathering rates, and how different polymer types break down under marine conditions.
Environmental degradation and fragmentation of microplastics: dependence on polymer type, humidity, UV dose and temperature
Researchers systematically tested how UV light, temperature, and humidity cause five common plastic types to break apart into secondary microplastics and nanoplastics. They found that the type of plastic — not the aging conditions — was the main factor determining how quickly it fragmented and what byproducts it released, data that can improve models predicting how plastics break down in the environment.
Aging behavior of microplastics accelerated by mechanical fragmentation: alteration of intrinsic and extrinsic properties
Researchers mechanically fragmented polystyrene, polypropylene, and PET microplastics to simulate environmental aging, finding that fragmentation alters surface chemistry, crystallinity, and heavy metal adsorption capacity, with aging degree measurable through structural changes.
Oxidation and fragmentation of plastics in a changing environment; from UV-radiation to biological degradation
This review examines how plastics break down in the environment through UV radiation, weathering, and biological processes, producing smaller and smaller fragments including microplastics and nanoplastics. The breakdown process also releases chemical additives and creates particles with altered surface properties that may be more toxic than the original plastic. Understanding these degradation pathways is critical because the secondary particles produced may pose greater risks to ecosystems and human health than the larger plastic debris.
Physicochemical and biological ageing processes of (micro)plastics in the environment: a multi-tiered study on polyethylene
Researchers applied a multi-tiered approach combining laboratory aging, field deployment, and environmental simulation to study how polyethylene plastic undergoes physicochemical and biological weathering in natural settings. The study found that UV radiation and microbial colonization act synergistically to accelerate surface oxidation and fragmentation of PE into smaller particles.
Which factors mainly drive the photoaging of microplastics in freshwater?
This study systematically investigated the roles of UV irradiation, oxygen, temperature, and physical abrasion in the photoaging of polystyrene microplastics in freshwater. UV irradiation and mechanical abrasion were identified as the dominant aging factors, and their combined effect caused more extensive surface oxidation and fragmentation than either alone.
Thermal oxidation, ultraviolet radiation, and mechanical abrasion - understanding mechanisms of microplastic generation and chemical transformation
Researchers evaluated how consumer-derived polymers fragment and chemically transform when exposed to UV radiation or thermal oxidation followed by soil abrasion. The study found that these combined weathering processes, which mimic real-world environmental conditions, significantly affect the rate and type of microplastic generation. The results highlight how everyday use and environmental exposure work together to break down plastics into microplastic particles.
Aging simulation of thin-film plastics in different environments to examine the formation of microplastic
Researchers aged polyethylene, polypropylene, and polystyrene thin films under land, freshwater, estuarine, and oceanic conditions, finding that UV radiation was the primary driver of surface degradation and microplastic formation, with degradation rates varying substantially by environmental medium.
Recent advances on microplastic aging: Identification, mechanism, influence factors, and additives release
This review found that environmental aging transforms microplastic surface properties through abrasion, chemical oxidation, UV irradiation, and biodegradation, altering their environmental behavior and ecological risk. Aging also triggers the release of toxic plastic additives, but significant gaps remain between laboratory aging simulations and real-world conditions.
Non-Negligible Effects of UV Irradiation on Transformation and Environmental Risks of Microplastics in the Water Environment
This review examines how UV irradiation drives photoaging of microplastics in aquatic environments, altering their surface chemistry, mechanical properties, and adsorption capacity for co-pollutants, and thereby amplifying their ecotoxicological risks beyond those of virgin plastic particles.