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Manganese redox cycle on the surface of ferrihydrite induces the aging of polystyrene nanoplastics
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Polystyrene nanoplastics facilitate the Fe(II)-catalyzed ferrihydrite transformation into goethite and hematite under sedimentary conditions
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Researchers found that polystyrene nanoplastics significantly accelerate iron mineral transformation in sediments, speeding up the conversion of ferrihydrite into goethite and hematite by reducing surface charges on the mineral and enhancing electron transfer—an overlooked interaction that alters iron geochemistry and influences how nanoplastics behave in aquatic sediments.
Oxidative Roles of Polystyrene-Based Nanoplastics in Inducing Manganese Oxide Formation under Light Illumination
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Researchers demonstrated that polystyrene nanoplastics can generate reactive oxygen species under light illumination, driving the oxidation of dissolved manganese into manganese oxide minerals and revealing a previously unrecognized geochemical role of plastic debris.
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