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Manganese oxide-mediated inhibition of microplastic photodegradation: insight into the photoreduction mechanism

Regional Studies in Marine Science 2026
Sheng Liu, Jiayan Wu, Quanyun Ye, Tianming Wang, Leiye Sun, Baojun Li, Zenan Shi, Zhi Dang, Nengwu Zhu, Pingxiao Wu

Summary

Researchers found that manganese oxides significantly inhibit photodegradation of polystyrene and PVC microplastics by scavenging reactive oxygen species and forming light-shielding complexes, reducing breakdown rates by nearly 58%, challenging the view that minerals accelerate microplastic degradation.

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