点击次数：

论文类型：期刊论文

发表时间：2016-02-01

发表刊物：JOURNAL OF WATER PROCESS ENGINEERING

收录刊物：SCIE

卷号：9

页面范围：E14-E20

ISSN号：2214-7144

关键字：Ciprofloxacin; Carbon nanofibers; Dynamic adsorption; In situ fluorescence

摘要：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.