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Sorption of fluoroquinolones to nanoplastics as affected by surface functionalization and solution chemistry

Environmental Pollution 2020 96 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.

Su-chun Wang, Su-chun Wang, Feifei Liu, Guangzhou Liu, Feifei Liu, Su-chun Wang, Zhilin Zhu Su-chun Wang, Feifei Liu, Feifei Liu, Zhilin Zhu, Feifei Liu, Feifei Liu, Huan Zhang, Guangzhou Liu, Feifei Liu, Guangzhou Liu, Guangzhou Liu, Su-chun Wang, Feifei Liu, Feifei Liu, Feifei Liu, Zhilin Zhu, Su-chun Wang, Guangzhou Liu, Guangzhou Liu, Zhilin Zhu Zhilin Zhu, Feifei Liu, Feifei Liu, Feifei Liu, Feifei Liu, Feifei Liu, Su-chun Wang, Feifei Liu, Zhilin Zhu Zhilin Zhu Zhilin Zhu Zhilin Zhu Huan Zhang, Su-chun Wang, Zhilin Zhu, Zhilin Zhu, Zhilin Zhu, Su-chun Wang, Tianyuan Huang, Feifei Liu, Feifei Liu, Feifei Liu, Su-chun Wang, Guangzhou Liu, Guangzhou Liu, Feifei Liu, Feifei Liu, Su-chun Wang, Feifei Liu, Huan Zhang, Huan Zhang, Su-chun Wang, Guangzhou Liu, Feifei Liu, Huan Zhang, Feifei Liu, Guangzhou Liu, Mengru Li, Feifei Liu, Guangzhou Liu, Guangzhou Liu, Zhilin Zhu, Guangzhou Liu, Guangzhou Liu, Feifei Liu, Zhilin Zhu Guangzhou Liu, Guangzhou Liu, Guangzhou Liu, Zhilin Zhu

Summary

Researchers investigated the sorption behavior of two fluoroquinolone antibiotics — norfloxacin and levofloxacin — onto plain and carboxyl-functionalized polystyrene nanoplastics, finding nonlinear sorption isotherms best fit by the Langmuir model and that surface functionalization and solution chemistry significantly affected uptake.

Polymers

Microplastics have attracted much attention in recent years as they can interact with pollutants in water environment. However, nanoplastics (NPs) with or without the surface functionalization modification have not been thoroughly explored. Here, the sorption behaviors of two fluoroquinolones (FQs), including norfloxacin (NOR) and levofloxacin (LEV) on polystyrene NPs (nano-PS) and carboxyl-functionalized polystyrene NPs (nano-PS-COOH) were investigated. The results showed that sorption isotherms were nonlinear and well fitted by Langmuir model. The sorption capacities of NOR and LEV on nano-PS-COOH were higher than those on nano-PS, and their physical interactions, including polar interaction, electrostatic interaction and hydrogen bonding may be the dominant mechanisms. Moreover, the increase of pH firstly increased the sorption of two FQs on NPs and then decreased because NOR and LEV had a reverse charge at different pH values. Salinity and dissolved organic matter both inhibited the sorption process. These findings show that NPs with or without the surface functionalization modification have different sorption behaviors for environmental pollutants, which deserve our further concern.

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