文章基本信息

标题：Removal of methylene blue and mechanism on magnetic ?-Fe2O3/SiO2 nanocomposite from aqueous solution
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作者：Dong Chen ; Ziyang Zeng ; Yubin Zeng 等
期刊名称：Water Resources and Industry
印刷版ISSN：2212-3717
出版年度：2016
卷号：15
页码：1-13
DOI：10.1016/j.wri.2016.05.003
出版社：Elsevier
摘要：Magnetic @c-Fe"2O"3/SiO"2 (M-@cFS) nanocomposite was prepared using @c-Fe"2O"3 as the magnetic carriers. M-@cFS was characterized by transmission electron microscope (TEM), X-ray diffraction (XRD), and Fourier Transform infrared spectroscopy (FTIR). The characterizations of M-@cFS exhibit the irregular core-shell structure, and SiO"2 has been successfully coated on the surface of @c-Fe"2O"3. M-@cFS has much higher adsorption capacity 116.09mg/g calculated by coated SiO"2 on M-@cFS than @c-Fe"2O"3 and SiO"2, and the alkaline conditions are beneficial to the adsorption of MB. Coexisting cations, ionic strength and humic acid can influence the adsorption capacity. Meanwhile, adsorption kinetics data for M-@cFS show good fit to the pseudo-second-order kinetics model, and the Langmuir equation is more appropriate to describe the adsorption behavior of MB on M-@cFS. Moreover, after recycling four times, M-@cFS washed by ethanol can still keep high adsorption capacity for MB adsorption.
关键词：Magnetic @c; Fe"2O"3/SiO"2; Methylene blue; Adsorption; Kinetics; Regeneration