Synthesis of carbon-coated magnetic nanocomposite(Fe_3O_4@C) and its application for sulfonamide antibiotics removal from water

作     者：Xiaolei Bao Zhimin Qiang Jih-Hsing Chang Weiwei Ben Jiuhui Qu 

作者机构：State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences State Environmental Protection Engineering Center for Pharmacy Wastewater Pollution Control Hebei Provincial Environmental Scientific Research Department of Environmental Engineering and Management Chaoyang University of Technology 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2014年第26卷第5期

页      面：962-969页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0815[工学-水利工程] 

基　　金：supported by the National Natural Science Foundation of China(No.51221892) the Ministry of Science and Technology of China(No.2012AA062606,2012BAJ25B04) the People Programme(Marie CurieActions) of the European Union’s Seventh Programme FP7/2007-2013 under a REA grant(No.318926) 

主　　题：magnetic nanocomposite carbon shell sulfonamides adsorption water 

摘      要：The occurrence of antibiotics in the environment has recently raised serious concerns regarding their potential threat to human health and aquatic ecosystem. A new magnetic nanocomposite, Fe304@C （Fe304 coated with carbon）, was synthesized, characterized, and then applied to remove five commonly-used sulfonamides （SAs） from water. Due to its combinational merits of the outer functionalized carbon shell and the inner magnetite core, Fe3O4@C exhibited a high adsorption affinity for selected SAs and a fast magnetic separability. The adsorption kinetics of SAs on Fe304 @ C could be expressed by the pseudo second-order model. The adsorption isotherms were fitted well with the Dual-mode model, revealing that the adsorption process consisted of an initial partitioning stage and a subsequent hole-filling stage. Solution pH exerted a strong impact on the adsorption process with the maximum removal efficiencies （74% to 96%） obtained at pH 4.8 for all selected SAs. Electrostatic force and hydrogen bonding were two major driving forces for adsorption, and electron-donor-acceptor interactions may also make a certain contribution. Because the synthesized Fe304@C showed comprehensive advantages of high adsorptivity, fast magnetic separability, and prominent reusability, it has potential applications in water treatment.