文献类型：期刊文献

英文题名：Fabrication of Fe3O4/MgAl-layered double hydroxide magnetic composites for the effective decontamination of Co(II) from synthetic wastewater

作者：Shou, Jianxin[1];Jiang, Chunfang[1];Wang, Fang[1];Qiu, Muqing[2];Xu, Qinggang[3]

机构：[1]Shaoxing Univ, Dept Life Sci, Yuanpei Coll, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Coll Life Sci, Shaoxing 312000, Peoples R China;[3]Jiangsu Univ, Inst Life Sci, Zhenjiang, Jiangsu, Peoples R China

年份：2015

卷号：207

起止页码：216

外文期刊名：JOURNAL OF MOLECULAR LIQUIDS

收录：SCI-EXPANDED(收录号：WOS:000356185600029)、、WOS

基金：This study was financially supported by the project of science and technology plan in Shaoxing City (2012B70081).

语种：英文

外文关键词：Layered double hydroxide; Magnetic separation; Co(II); Adsorption; Fe3O4/MgAl-LDH

外文摘要：Magnetic materials have attracted great attention as potential adsorbents for the effective removal and quick separation of contaminants in wastewater treatment. In this work, a Fe3O4/MgAl-LDH magnetic composite was prepared by chemical coprecipitation and used for the effective decontamination of Co(II) from a synthetic wastewater by an adsorption process. The characterization of XRD, TEM and FTIR indicated that Fe3O4 was successfully loaded on MgAl-LDH, providing the Fe3O4/MgAl-LDH with magnetic property which facilitates the separation of solid from aqueous solution. The adsorption of Co(II) by Fe3O4/MgAl-LDH strongly depended upon the contact time, solid content, HA or FA, pH and ionic strength. The adsorption of Co(II) reached equilibrium at 120 min. The adsorption of Co(II) was dependent on ionic strength at low pH values which is controlled by outer-sphere surface complexation and/or ion exchange, while independent of ionic strength at high pH values that is attributed to the inner-sphere surface complexation. The presence of HA or FA promotes Co(II) adsorption on Fe3O4/MgAl-LDH at low pH values, whereas decreased Co(II) adsorption at high pH values. Moreover, related data show that Fe3O4/MgAl-LDH exhibits satisfactory removal efficiency for the simulated wastewater. It is worth noting that Fe3O4/MgAl-LDH could be easily separated from aqueous solution by an external magnet. So, it is clear that Fe3O4/MgAl-LDH can be potentially used as a cost-effective materials for the purification of actual Co(II)-bearing effluents. (C) 2015 Elsevier B.V. All rights reserved.