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Sorption of tetracycline antibiotics by microplastics, associated mechanisms, and risk assessments

The Science of The Total Environment 2024 16 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.

Xiang Li, Huating Jiang, Xiang Li, Xiang Li, Yingjie Dai Yingjie Dai Xiang Li, Huating Jiang, Huating Jiang, Liya Zhu, Huating Jiang, Lingling Zeng, Yingjie Dai Huating Jiang, Liya Zhu, Jia Sui, Liya Zhu, Jia Sui, Junqian Tang, Jia Sui, Junqian Tang, Jia Sui, Liya Zhu, Liya Zhu, Bao Shuang, Bao Shuang, Yingjie Dai Yingjie Dai Yingjie Dai Liya Zhu, Huating Jiang, Liya Zhu, Junqian Tang, Junqian Tang, Huating Jiang, Huating Jiang, Yingjie Dai Yingjie Dai Yingjie Dai Yingjie Dai

Summary

Researchers systematically investigated how three common microplastic types adsorb tetracycline antibiotics. The study found that polystyrene had the highest adsorption capacity at 178.57 micrograms per gram, followed by PVC and polyethylene, and that PVC and polystyrene strongly retained the antibiotics with minimal desorption, raising concerns about compound pollution from microplastic-antibiotic combinations in the environment.

Polymers

PE PS PVC

In this study, we selected polyvinyl chloride (PVC), polyethylene (PE), and polystyrene (PS) as representative microplastics (MPs) to systematically investigate the sorption behavior of tetracycline (TC) antibiotics by MPs. Scanning electron microscopy, X-ray diffraction, Fourier transform-infrared spectroscopy, and adsorption experiments were applied to assess the sorption behavior of MPs. The results demonstrated that the sorption of TC by MPs was most favorable under neutral conditions, where a modest increase in the salt ion concentration enhanced the adsorption of TC by MPs. The saturation adsorption capacities for PVC, PE, and PS for TC were determined as 121.95 μg/g, 81.301 μg/g, and 178.57 μg/g, respectively. The strength of TC sorption by MPs followed the order of: PS > PVC > PE. Analysis of the sorption behavior of TC by MPs showed that the adsorption of TC by PE was weak and it readily desorbed, and thus their interaction will not lead to excessive compound pollution. By contrast, the adsorption of TC was high by PVC and PS, and they were not readily desorbed.

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