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Indexed by:期刊论文

Date of Publication:2016-02-01

Journal:JOURNAL OF WATER PROCESS ENGINEERING

Included Journals:SCIE

Volume:9

Page Number:E14-E20

ISSN No.:2214-7144

Key Words:Ciprofloxacin; Carbon nanofibers; Dynamic adsorption; In situ fluorescence

Abstract: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.