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Which factors mainly drive the photoaging of microplastics in freshwater?

The Science of The Total Environment 2022 51 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 45 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Zeyuan Yang, Zeyuan Yang, Peng Liu, Peng Liu, Peng Liu, Xuetao Guo Peng Liu, Xuetao Guo Peng Liu, Jiamin Dai, Zeyuan Yang, Jiamin Dai, Xuetao Guo Jiamin Dai, Peng Liu, Xuetao Guo Jiamin Dai, Jiamin Dai, Jiamin Dai, Xuetao Guo Jiamin Dai, Xuetao Guo Peng Liu, Peng Liu, Peng Liu, Peng Liu, Peng Liu, Xuetao Guo Xuetao Guo Peng Liu, Jiamin Dai, Jiamin Dai, Li Huang, Jiamin Dai, Li Huang, Xuetao Guo Xuetao Guo Xuetao Guo Zeyuan Yang, Peng Liu, Xuetao Guo Xuetao Guo Peng Liu, Peng Liu, Xuetao Guo Hong Qiang, Chenyang Wang, Hong Qiang, Xuetao Guo Xuetao Guo Xuetao Guo Peng Liu, Xuetao Guo Xuetao Guo Peng Liu, Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Peng Liu, Xuetao Guo Peng Liu, Peng Liu, Jiamin Dai, Jiamin Dai, Li Huang, Li Huang, Li Huang, Zeyuan Yang, Jiamin Dai, Jiamin Dai, Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Hong Qiang, Hong Qiang, Zeyuan Yang, Hong Qiang, Xuetao Guo Xuetao Guo Hong Qiang, Xuetao Guo Xuetao Guo Xuetao Guo Shixiang Gao, Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Peng Liu, Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Shixiang Gao, Shixiang Gao, Shixiang Gao, Shixiang Gao, Peng Liu, Peng Liu, Peng Liu, Peng Liu, Hong Qiang, Hong Qiang, Zeyuan Yang, Zeyuan Yang, Zeyuan Yang, Hong Qiang, Hong Qiang, Jiamin Dai, Xuetao Guo Xuetao Guo Peng Liu, Xuetao Guo Jiamin Dai, Xuetao Guo Peng Liu, Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Shixiang Gao, Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Zeyuan Yang, Shixiang Gao, Xuetao Guo Xuetao Guo Shixiang Gao, Xuetao Guo Shixiang Gao, Shixiang Gao, Xuetao Guo Xuetao Guo Peng Liu, Peng Liu, Xuetao Guo Peng Liu, Xuetao Guo Xuetao Guo Xuetao Guo Hong Qiang, Hong Qiang, Hong Qiang, Hong Qiang, Xuetao Guo Xuetao Guo Xuetao Guo Shixiang Gao, Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Shixiang Gao, Shixiang Gao, Shixiang Gao, Xuetao Guo Shixiang Gao, Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Shixiang Gao, Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Shixiang Gao, Shixiang Gao, Shixiang Gao, Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Xuetao Guo Shixiang Gao, Xuetao Guo Xuetao Guo Shixiang Gao, Xuetao Guo Shixiang Gao, Xuetao Guo

Summary

This study systematically investigated the roles of UV irradiation, oxygen, temperature, and physical abrasion in the photoaging of polystyrene microplastics in freshwater. UV irradiation and mechanical abrasion were identified as the dominant aging factors, and their combined effect caused more extensive surface oxidation and fragmentation than either alone.

Polymers

Study Type Environmental

Light irradiation is considered as most important process for the aging of microplastics (MPs); however, which factors drive the process is still unknown. This study investigated the role of typical environmental factors including ultraviolet (UV), oxygen, temperature and physical abrasion in the photoaging of polystyrene (PS) in freshwater. Results showed that UV irradiation and abrasion were dominant factors for affecting photoaging of PS based on dynamic analysis in the property of MP itself and leachate. Especially, when both factors worked together on MPs, they caused more destructive effect. Mechanical exploration revealed that photoaging of MPs was mainly controlled by reactive oxygen species (ROS, O) generated from the reaction of dissolved oxygen/water molecules with polymer radicals initiated by UV energy. As an attacker on MPs, ROS formation was significantly linked with UV intensity, highlighting the important role of UV. The fragmentation was correlated to abrasion intensity, where a higher abrasion generated stronger physical force to tear MPs into fragments. The low roles of oxygen and temperature were presumably related to multiple effects of ROS formation and UV absorption. The findings firstly clarify the drivers in the photoaging of MPs, and contribute our effort to assess their fate and pollution risk in the environment.

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