Dynamic adsorption of ciprofloxacin on carbon nanofibers: Quantitative measurement by in situ fluorescence
Dynamic adsorption of ciprofloxacin on carbon nanofibers: Quantitative measurement by in situ fluorescence
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环丙沙星在碳纳米纤维上的动态吸附：原位荧光定量测量
DOI：
10.1016/j.jwpe.2014.12.006
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发表时间：
2016-02-01
影响因子：
7
通讯作者：
Zhao, Huimin
中科院分区：
文献类型：
--
作者：
Li, Xiaona;Wang, Wenqiang;Zhao, Huimin
抗生素已被认为是对人类和生态健康的潜在风险。为了开发简便有效的去除水中氟喹啉类抗生素环丙沙星（CIP）的处理技术，建立了基于碳纳米纤维（CNFs）的动态吸附实验装置，并首次采用原位荧光（FL）定量测定了CIP的吸附量。实验结果表明，吸附动力学符合准二级动力学模型，吸附等温线符合Langmuir模型。吸附平衡时间在4 h内完成，比文献报道的其它炭材料吸附时间短得多。最大吸附量（q（m））为10.36 mg/g，与CIP在生物复合纤维上的吸附量（q（m））相近。CNFs的强吸附力主要来自于π-π电子-给体-受体（EDA）相互作用、疏水相互作用和静电相互作用。碳纳米纤维对CIP的动态吸附为CIP的去除提供了一种新的有效途径，预示着碳纳米纤维在水处理领域的潜在应用前景。(C)2015爱思唯尔有限公司出版
Antibiotics have been considered to be a potential risk to human and ecological health. In an effort to develop convenient and effective treatment technology for the removal of fluoroquinoline antibiotics ciprofloxacin (CIP) from aqueous solution, a dynamic adsorption experimental apparatus based on carbon nanofibers (CNFs) was built and the adsorption of CIP was quantitatively measured by in situ fluorescence (FL) for the first time. The experimental results show that the adsorption kinetics and isotherms match well with the pseudo-second-order model and the Langmuir model, respectively. The adsorption equilibrium accomplished within 4 h, which is much shorter than the adsorption of CIP on the other carbon materials reported before. The maximum adsorption capacity (q(m)) is 10.36 mg/g, which is similar to the q(m) of CIP adsorption on biocomposite fibers. The strong adsorption affinity exhibited by CNFs was ascribed to the contributions of pi-pi electron-donor-acceptor (EDA) interaction, hydrophobic interaction and electrostatic interaction. The dynamic adsorption of CIP on CNFs provides a novel and effective approach for CIP removal, implying the potential practical application of CNFs in the field of water treatment. (C) 2015 Published by Elsevier Ltd.