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Impacts of microplastics on organotins’ photodegradation in aquatic environments

Environmental Pollution 2020 61 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Chunzhao Chen, Chunzhao Chen, Chunzhao Chen, Yang Li Chunzhao Chen, Chunzhao Chen, Chunzhao Chen, Yang Li Ling Chen, Jiajun Duan, Jiajun Duan, Yang Li Jiajun Duan, Chunzhao Chen, Chunzhao Chen, Chunzhao Chen, Chunzhao Chen, Chunzhao Chen, Chunzhao Chen, Wanyi Fu, Jiajun Duan, Wen Zhang, Yang Li Yang Li Ling Chen, Yang Li Ling Chen, Ling Chen, Yang Li Ling Chen, Yang Li Ling Chen, Jiajun Duan, Yang Li Ling Chen, Yang Li Ling Chen, Yang Li Chunzhao Chen, Yang Li Yang Li Yang Li Chunzhao Chen, Ling Chen, Jiajun Duan, Wanyi Fu, Chunzhao Chen, Chunzhao Chen, Jiajun Duan, Yang Li Yang Li Ling Chen, Yang Li Yang Li Wanyi Fu, Xiaonan Shi, Ling Chen, Wen Zhang, Ling Chen, Ling Chen, Yang Li Yang Li Xiaonan Shi, Wen Zhang, Ling Chen, Jiajun Duan, Yang Li Jiajun Duan, Jiajun Duan, Jiajun Duan, Ling Chen, Yang Li Yang Li Yang Li Wen Zhang, Wen Zhang, Wen Zhang, Yang Li Yang Li Yang Li Yang Li Yang Li Yang Li Wen Zhang, Wen Zhang, Yang Li Wen Zhang, Yang Li Yang Li

Summary

Researchers found that polypropylene, polyethylene, polystyrene, and polymethyl methacrylate microplastics differentially affect the photodegradation of organotin compounds in aquatic environments, with microplastics both adsorbing organotins and altering their photolytic breakdown pathways depending on polymer type.

Polymers

PE PMMA PP PS

Study Type Environmental

Microplastics are ubiquitous in natural waters and affect the environmental fate of hydrophobic organic micropollutants. This study evaluated the impacts of four microplastics, polypropylene (PP), polyethylene (PE), polystyrene (PS) and polymethyl methacrylate (PMMA), on the photodegradation of organotin compounds (OTCs) under UV irradiation (2.3 ± 0.1 W m). The experiments were performed by mixing PP, PE, PS or PMMA microparticles with tri-organotins in artificial seawater. The photodegradation of OTCs in microplastic suspensions was influenced by the absorptivity onto microplastics. The decomposition rate of tributyltin (TBT) in UV-irradiated PP suspensions was greater than trimethyltin (TMT) and triphenyltin (TPhT) (p < 0.01). The adsorption capacities of OTCs (e.g., TBT) on PP particle surfaces were significantly lower than those on PE surfaces (p < 0.05) but similar with those on PMMA due to the different surface areas, shapes, and surface hydrophobicity of microplastics. TBT degraded faster (9.1%) in PS than in PMMA suspension (11.2%) within 240 min, respectively. However, only less than 5.4% was photodegraded in PP suspension due to the light scattering or absorption of the large sized PP particles. This study provided new insight into the impacts of microplastics on photodegradation of micropollutants in natural waters.

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