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Impact of size and UV-ageing of polystyrene nanoparticles on copper(ii) adsorption: kinetics and isotherms in aquatic environments
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Researchers studied how particle size and UV-induced aging of polystyrene nanoparticles affect their adsorption of copper(II) ions in aquatic environments, finding that smaller particles and UV-aged surfaces with altered surface chemistry showed markedly different adsorption kinetics and capacities, with implications for how nanoplastics transport heavy metal contaminants in water.
Size-dependent adsorption of Cu 2+ ions onto polystyrene nanoparticles in aquatic environments: influence of UV-ageing, temperature and salt ions in the medium.
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[Effect of Photoaging on Adsorption of Cu(Ⅱ) by Polystyrene Microplastics with Different Particle Sizes].
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Researchers systematically examined how UV photoaging and particle size affect the adsorption of copper ions by polystyrene microplastics of 1, 50, and 100 micrometers, finding that UV aging significantly altered surface morphology and physicochemical properties, with 1 micrometer particles showing the strongest aging, and that adsorption followed pseudo-second-order kinetics and Freundlich multilayer behavior on heterogeneous surfaces.
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UV-aged polystyrene microplastics showed altered surface chemistry and enhanced adsorption of copper ions compared to virgin particles, with the degree of adsorption increasing with aging duration. The findings indicate that environmental weathering transforms microplastics into more potent heavy metal carriers, intensifying their role as pollutant vectors.
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Researchers investigated how polystyrene and polyethylene terephthalate microplastics adsorb copper ions in seawater, characterizing adsorption kinetics and influencing factors to understand microplastics' role as vectors for heavy metal pollutants in marine environments.
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The role of polystyrene microplastics in binding copper (Cu) and altering its environmental mobility and toxicity was investigated, finding that microplastics can both adsorb and release copper depending on environmental conditions. This has implications for how microplastics modulate heavy metal hazards in contaminated environments.
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The aging behavior of polystyrene microplastics was investigated in the presence of copper and lead ions, finding that both metals accelerated surface oxidation through generation of reactive oxygen species, with copper producing stronger effects. The study reveals that heavy metal co-contamination can substantially alter the weathering trajectory of microplastics in natural environments.
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