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Mechanistic Roles of Microplastics in the Phototransformation of Silver Ions in Aquatic Environments

Environmental Science & Technology 2025 3 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 48 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Fei Dang, Yuantong Chi, Fei Dang, Fei Dang, Zhenyu Wang, Jian Zhao, Xia Liu, Fei Dang, Yanhui Dai, Jian Zhao, Yuantong Chi, Yanhui Dai, Tongtao Yue, Fei Dang, Tongtao Yue, Fei Dang, Fei Dang, Dongfang Xu, Zhenyu Wang, Dongfang Xu, Zhuomiao Liu, Fei Dang, Xia Liu, Jian Zhao, Xia Liu, Jian Zhao, Jian Zhao, Jian Zhao, Xia Liu, Dongfang Xu, Dongfang Xu, Tongtao Yue, Tongtao Yue, Zhuomiao Liu, Tongtao Yue, Jian Zhao, Xia Liu, Jian Zhao, Jian Zhao, Dongfang Xu, Dongfang Xu, Wenli Su, Wenli Su, Dongfang Xu, Dongfang Xu, Zhenyu Wang, Zhenyu Wang, Zhuomiao Liu, Zhenyu Wang, Zhenyu Wang, Zhuomiao Liu, Zhuomiao Liu, Zhenyu Wang, Zhuomiao Liu, Zhuomiao Liu, Baoshan Xing Jian Zhao, Xia Liu, Zhenyu Wang, Wenli Su, Wenli Su, Jian Zhao, Zhenyu Wang, Baoshan Xing Fei Dang, Baoshan Xing Wenli Su, Jian Zhao, Wenli Su, Yanhui Dai, Jian Zhao, Jian Zhao, Zhenyu Wang, Zhenyu Wang, Jian Zhao, Wenli Su, Jianjun Wang, Zhenyu Wang, Wenli Su, Baoshan Xing Zhenyu Wang, Baoshan Xing Baoshan Xing Zhenyu Wang, Baoshan Xing Xia Liu, Zhenyu Wang, Fei Dang, Jian Zhao, Baoshan Xing Zhenyu Wang, Baoshan Xing Tongtao Yue, Wenli Su, Zhuomiao Liu, Wenli Su, Zhenyu Wang, Baoshan Xing Xia Liu, Zhenyu Wang, Zhenyu Wang, Zhenyu Wang, Zhuomiao Liu, Baoshan Xing Baoshan Xing Baoshan Xing Zhuomiao Liu, Jian Zhao, Jian Zhao, Tongtao Yue, Tongtao Yue, Baoshan Xing Zhenyu Wang, Jianjun Wang, Yanhui Dai, Baoshan Xing Baoshan Xing Yanhui Dai, Yanhui Dai, Yanhui Dai, Yanhui Dai, Zhenyu Wang, Zhenyu Wang, Zhenyu Wang, Zhenyu Wang, Zhenyu Wang, Zhenyu Wang, Zhenyu Wang, Baoshan Xing Zhenyu Wang, Fei Dang, Zhuomiao Liu, Dongfang Xu, Zhuomiao Liu, Baoshan Xing Zhuomiao Liu, Zhenyu Wang, Baoshan Xing Baoshan Xing Wenli Su, Wenli Su, Jian Zhao, Zhenyu Wang, Jian Zhao, Tongtao Yue, Zhenyu Wang, Dongfang Xu, Baoshan Xing Jian Zhao, Baoshan Xing Tongtao Yue, Zhuomiao Liu, Baoshan Xing Tongtao Yue, Xia Liu, Tongtao Yue, Yanhui Dai, Baoshan Xing Zhuomiao Liu, Zhuomiao Liu, Xia Liu, Zhenyu Wang, Fei Dang, Zhuomiao Liu, Zhenyu Wang, Zhuomiao Liu, Zhenyu Wang, Zhenyu Wang, Zhenyu Wang, Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Jian Zhao, Jian Zhao, Jian Zhao, Jian Zhao, Jian Zhao, Yanhui Dai, Yanhui Dai, Yanhui Dai, Tongtao Yue, Tongtao Yue, Tongtao Yue, Zhuomiao Liu, Baoshan Xing Xia Liu, Jian Zhao, Jian Zhao, Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Yanhui Dai, Yanhui Dai, Baoshan Xing Baoshan Xing Fei Dang, Tongtao Yue, Zhuomiao Liu, Tongtao Yue, Zhenyu Wang, Baoshan Xing Tongtao Yue, Baoshan Xing Zhuomiao Liu, Zhuomiao Liu, Zhuomiao Liu, Baoshan Xing Baoshan Xing Jian Zhao, Jian Zhao, Jian Zhao, Jian Zhao, Jian Zhao, Jian Zhao, Jian Zhao, Baoshan Xing Zhenyu Wang, Yanhui Dai, Tongtao Yue, Yanhui Dai, Baoshan Xing Baoshan Xing Baoshan Xing Tongtao Yue, Zhenyu Wang, Zhuomiao Liu, Zhenyu Wang, Tongtao Yue, Zhuomiao Liu, Yanhui Dai, Baoshan Xing Zhenyu Wang, Baoshan Xing Baoshan Xing Tongtao Yue, Baoshan Xing Jianjun Wang, Baoshan Xing Jian Zhao, Tongtao Yue, Baoshan Xing Baoshan Xing Yanhui Dai, Zhenyu Wang, Baoshan Xing Baoshan Xing Jian Zhao, Baoshan Xing Jianjun Wang, Tongtao Yue, Baoshan Xing Baoshan Xing Fei Dang, Baoshan Xing Jian Zhao, Jianjun Wang, Baoshan Xing Baoshan Xing

Summary

This study found that polystyrene microplastics mediate the transformation of silver ions into silver nanoparticles (Ag0, Ag2O, Ag2S) under natural and UV light irradiation, acting as reactive surfaces that alter silver speciation and potentially increase its bioavailability in aquatic systems.

Polymers

The role of microplastics (MPs) in transforming coexisting contaminants in aquatic environments is poorly understood. Herein, the mediation of polystyrene (PS) MPs on the phototransformation of silver ions (Ag+) was investigated. Ag-based nanoparticles (21.0-177.0 nm) formed from Ag+ in the presence of PS MPs (8.3-41.9 μm) after 40-day natural light and 96-h UV light irradiation, as detected by single-particle inductively coupled plasma mass spectrometry (sp-ICP-MS). Using a successive dissolution method, the species were identified as Ag0, Ag2O, and Ag2S nanoparticles. After 96 h of UV irradiation, Ag0 was the main nanoparticle species (93.4%), accounting for 78.0% of the total Ag. Both the MPs surface and the liquid phase were confirmed as Ag0 nanoparticle formation sites, whereas Ag2O and Ag2S were mainly formed in the liquid phase. Free radicals (superoxide radicals, oxygen-centered persistent free radicals) and oxygen-containing groups (aldehyde groups) on the MPs surface and dissolved organic matter in the liquid phase played crucial roles in Ag0 nanoparticle formation. Furthermore, sulfur species (e.g., S2- and S2O32-) in the liquid phase were responsible for the Ag2S nanoparticle formation. These findings are crucial for better understanding the environmental fate, geochemical cycle, and risk of both MPs and Ag+.

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