Adsorption of fluoroquinolone by carbon nanotubes: a combined experimental and density functional theory study
Adsorption of fluoroquinolone by carbon nanotubes: a combined experimental and density functional theory study
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DOI：
10.1007/s11696-020-01204-3
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发表时间：
2020-05-23
期刊：
影响因子：
2.2
通讯作者：
Zhong, Changping
中科院分区：
文献类型：
--
作者：
Chen, Zhiqian;Han, Ruiling;Zhong, Changping
由于快速的抗生素耐药性，氟喹诺酮类药物（FQs）的广泛使用及其在水环境中的存在越来越受到关注。本文采用湿化学实验和密度泛函理论研究了碳纳米管对恩诺沙星的吸附行为。结果表明，碳纳米管的表面氧化极大地改变了其表面化学性质，从而通过静电和H-给体-受体相互作用对ENR的吸附产生了显著影响。环境中共存的阳离子既能与ENR形成阳离子-偶极络合物，又能通过阳离子-π相互作用与CNT发生作用，增强了ENR的吸附。这些结果突出了表面化学在有效去除沃茨中抗生素方面的重要作用。
There is growing concern regarding the widespread use of fluoroquinolones (FQs) and their presence in the aqueous environment due to the rapid antibiotic resistance. In this study, wet chemistry experiment and DFT calculation were employed to investigate the adsorption of enrofloxacin (ENR), the most frequently used veterinary FQs, by carbon nanotubes (CNTs). The result revealed that the surface oxidation of CNT greatly modified its surface chemistry and thus had significant effect on ENR adsorption by the electrostatic and H-donor-acceptor interaction. Furthermore, the coexisted cations in environment could both react with ENR to form cation-dipole complex and react with CNT via cation-pi interaction, leading to an enhanced adsorption of ENR. These results highlight the important role of surface chemistry in the efficient removal of antibiotics in waters.