Exploring Polystyrene Weathering Behavior: From Surface Traits to Micro(Nano)Plastics and Additives Release

Exploring polystyrene weathering behavior: From surface traits to micro(nano)plastics and additives release

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Researchers systematically studied how polystyrene weathers under UV light and mechanical stress, tracking the release of microplastics, nanoplastics, and chemical additives over time. They found that weathering progressively altered the surface properties of the plastic and increased the release of smaller particles and potentially harmful additives. The findings help predict how polystyrene products break down in the environment and what secondary pollutants they generate.

Evolution of Polystyrene in Simulated River: Micro(Nano)Plastics Generation and Plastic Additives Release

Combined abiotic and biotic weathering of microplastic particles: Alterations of their physicochemical properties and interactions with cells

The Risks of aged polystyrene microplastics cannot be ignored: release of large amounts of degradation products

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Researchers used simulated digestion experiments to show that aged polystyrene microplastics release substantial degradation products into digestive fluids, causing a dual reduction in particle size and molecular weight that increases cellular uptake risk, while also altering digestive enzyme conformation — with longer aging producing greater and more hazardous chemical release.

Investigation of Surface Alteration of Microplastics by Using UV Irradiation

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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.