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Enhanced phototransformation of atorvastatin by polystyrene microplastics: Critical role of aging

Journal of Hazardous Materials 2020 81 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 50 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Yanqi Shi, Yanqi Shi, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Yanqi Shi, Yanqi Shi, Xiaowei Wu, Xiaowei Wu, Hanyu Wang, Yanqi Shi, Yanqi Shi, Yanqi Shi, Yanqi Shi, Yanqi Shi, Yanqi Shi, Xiaowei Wu, Hanyu Wang, Peng Liu, Peng Liu, Xiaowei Wu, Peng Liu, Yanqi Shi, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Yanqi Shi, Xiaowei Wu, Peng Liu, Hexinyue Huang, Hexinyue Huang, Xiaowei Wu, Xiaowei Wu, Yanqi Shi, Xiaowei Wu, Xiaowei Wu, Hexinyue Huang, Hexinyue Huang, Peng Liu, Hexinyue Huang, Xiaowei Wu, Peng Liu, Hexinyue Huang, Xiaowei Wu, Xiaowei Wu, Yanqi Shi, Peng Liu, Peng Liu, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Xiaowei Wu, Peng Liu, Peng Liu, Hanyu Wang, Hanyu Wang, Peng Liu, Xiaowei Wu, Yanqi Shi, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hanyu Wang, Hanyu Wang, Xiaowei Wu, Xiaowei Wu, Mengjie Wang, Mengjie Wang, Xiaowei Wu, Peng Liu, Yanqi Shi, Hanyu Wang, Hexinyue Huang, Yanqi Shi, Shixiang Gao Yanqi Shi, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Peng Liu, Peng Liu, Peng Liu, Peng Liu, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hexinyue Huang, Shixiang Gao, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hanyu Wang, Yanqi Shi, Yanqi Shi, Yanqi Shi, Yanqi Shi, Hexinyue Huang, Yanqi Shi, Hexinyue Huang, Yanqi Shi, Yanqi Shi, Xiaowei Wu, Yanqi Shi, Hexinyue Huang, Yanqi Shi, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hanyu Wang, Hexinyue Huang, Hanyu Wang, Yanqi Shi, Hanyu Wang, Hexinyue Huang, Peng Liu, Hanyu Wang, Xiaowei Wu, Shixiang Gao, Hexinyue Huang, Shixiang Gao Hexinyue Huang, Hexinyue Huang, Shixiang Gao Yanqi Shi, Shixiang Gao, Shixiang Gao Shixiang Gao, Xiaowei Wu, Yanqi Shi, Yanqi Shi, Shixiang Gao, Mengjie Wang, Hanyu Wang, Yanqi Shi, Xiaowei Wu, Hanyu Wang, Shixiang Gao Hexinyue Huang, Shixiang Gao Yanqi Shi, Shixiang Gao, Hexinyue Huang, Yanqi Shi, Hexinyue Huang, Shixiang Gao Xiaowei Wu, Shixiang Gao Shixiang Gao Shixiang Gao Shixiang Gao Shixiang Gao Shixiang Gao, Shixiang Gao, Shixiang Gao, Shixiang Gao, Shixiang Gao, Shixiang Gao, Shixiang Gao, Peng Liu, Peng Liu, Shixiang Gao Shixiang Gao Shixiang Gao Xiaowei Wu, Yanqi Shi, Yanqi Shi, Shixiang Gao Yanqi Shi, Shixiang Gao, Yanqi Shi, Shixiang Gao, Shixiang Gao Shixiang Gao

Summary

Polystyrene microplastics facilitated the phototransformation of atorvastatin under simulated sunlight, and the enhancement rate was linearly correlated with microplastic aging degree (carbonyl index), driven by increased reactive oxygen species generation from oxygen-containing functional groups on weathered MPs.

Polymers
PS

Reactive oxygen species (ROS) generated from light irradiation of microplastics (MPs) can potentially affect the environmental fate of organic contaminants when they coexist in the same environment. This study investigated the effect of polystyrene (PS) MPs with different aging degrees on the phototransformation of atorvastatin (ATV) under simulated sunlight. Results showed that the presence of PS MPs facilitated the phototransformation of ATV, and the degradation rate was linearly correlated with the aging degree (i.e., carbonyl index) of MPs. The enhanced effects mainly depended on the contents of oxygen-containing functional groups of PS MPs, which increased the absorption of light energy and the generation of ROS (e.g., singlet oxygen (O) and triplet-excited state PS (PS*)). Quenching experiments indicated that O generated from photosensitization of PS was the major contributor to the increased phototransformation of ATV. Additionally, the role of PS* became more important in the photodegradation mediated by higher degree aged MPs because much more O was generated from the PS* . PS MPs also increased the types and yields of degradation products, especially for higher degree aged MPs, despite the low effect on leachate toxicity. The findings provide a novel insight into the critical role of MPs in the fate of organic contaminants in aquatic environments.

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