Preparation of magnetically separable mesoporous activated carbons from brown coal with Fe3O4

作     者：Yong Jiang Qiang Xie Yanhai Zhang Cuiyu Geng Bin Yu Juan Chi 

作者机构：Poten Environmental Group Co.Ltd.Beijing 100083China School of Chemistry and Environmental EngineeringChina University of Mining and Technology (Bejing)Bejing 100083China 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2019年第29卷第3期

页      面：513-519页

核心收录：

学科分类：0819[工学-矿业工程] 08[工学] 

基　　金：supported by the Fund of 863 High-Tech Research and Development Program of China and the Poten research project No. YA-2016-003 

主　　题：Magnetic activated carbon Preparation Brown coal Ferroferric oxide Magnetic separation 

摘      要：Magnetically separable mesoporous activated carbon was prepared from brown coal in the presence of Fe3O4 as a bi-functional *** activated carbon(MAC)was characterized by lowtemperature nitrogen adsorption,scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS)and vibrating sample magnetometry(VSM).The evolution behaviors and transition mechanism of Fe3O4 during the preparation of MAC were *** results show that prepared MAC with 6 wt%Fe3O4 addition having a specific surface area and mesopore ratio of 370 m^2·g^-1 and 55.7%,which meet the requirements of adsorption application and magnetic *** dispersed iron-containing aggregates with the size of 0.1 lm in the MAC were *** the preparation of MAC,Fe3O4 could enhance the escape of volatiles during the ***3O4 could also accelerate burning off the carbon wall during activation,which leads to enlarging micropore size,then resulting in the generation of mesopore and *** a result,a part of Fe3O4 converted into FeO,FeOOH,a-Fe,c-Fe,Fe2SiO4 and compound of *** prepared activated carbon,which was magnetized by both of residual Fe3O4,reduced a-Fe and c-Fe,can be easily separated from the original solution by external magnetic field.