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Chemical heterogeneity observed in the development of photo-oxidized PET micro- and nanoparticle weathered controls
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Researchers developed UV-weathered micro- and nanoplastic reference controls from PET by photo-oxidation, characterizing chemical heterogeneity in the weathered particles to address challenges in accurately identifying and comparing aged plastic materials in environmental samples.
Development of UV-weathered micro- and nanoplastic controls for overcoming challenges associated with accurate chemical identification.
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Accelerated photoaging of microplastic - polyethylene terephthalate: physical, chemical, morphological properties and pesticide adsorption
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Researchers subjected polyethylene terephthalate (PET) microplastics to accelerated photoaging under simulated sunlight, characterizing changes in surface chemistry, crystallinity, and mechanical properties over time. Photoaging increased surface oxidation, reduced molecular weight, and enhanced the release of plastic additives, suggesting aged PET microplastics present greater chemical hazard than pristine particles.
Aging assessment of microplastics (LDPE, PET and uPVC) under urban environment stressors
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Researchers aged LDPE, PET, and uPVC microplastics using ozone, UV-C, and solar radiation to simulate urban environmental stressors, finding that each aging agent produced distinct changes in surface morphology, chemical structure, and crystallinity that could alter particle behavior in the environment.
Changes in the Chemical Composition of Polyethylene Terephthalate under UV Radiation in Various Environmental Conditions.
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Researchers exposed polyethylene terephthalate (PET) to UV radiation under controlled humidity conditions and tracked changes in its chemical composition, finding progressive oxidation and chain scission that alter the polymer's surface properties. Understanding how PET degrades under UV exposure is important for predicting how PET microplastics form and what chemical changes make them more or less bioavailable.
New approach to produce accelerated aged microplastics standard
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Researchers developed a new approach to produce accelerated aged microplastic standard materials by subjecting polymer particles to simulated weathering conditions, generating reference materials that more accurately reflect the degraded chemical and physical properties of microplastics found in real environmental samples.
Impact of weathering on the chemical identification of microplastics from usual packaging polymers in the marine environment
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The impact of environmental weathering on the chemical identification of common microplastics was investigated, examining how UV radiation, mechanical abrasion, and microbial activity alter the spectroscopic signatures used for polymer identification. Weathered plastics were harder to correctly identify than pristine ones, highlighting the need for reference libraries that include aged material.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.