摘要
为实现高岭土(Kaolin)在Cu2+废水处理中的实际应用,采用球磨方法制备了剥离Kaolin,并通过氧化沉淀法制备了Fe3O4/Kaolin磁性复合材料。通过激光粒度分析仪、SEM、XRD对Fe3O4/Kaolin磁性复合材料的形貌及组成进行表征,并通过测试Fe3O4/Kaolin磁性复合材料对Cu2+的饱和吸附量和磁分离回收率,确定了当Kaolin球磨4.0h、掺量为3.0g时所制备的Fe3O4/Kaolin磁性复合材料对Cu2+的吸附性能最佳,平衡吸附量为17.98mg/g。磁滞回线结果表明,Fe3O4/Kaolin磁性复合材料具有较好的磁响应性,饱和磁化强度约为16.19emu/g。此外,采用Langmuir和Freundlich吸附等温式对Fe3O4/Kaolin磁性复合材料的吸附数据进行拟合,结果表明,Fe3O4/Kaolin磁性复合材料对Cu2+的吸附行为基本符合Langmuir吸附等温模型和Freundlich吸附等温模型,既存在单分子层吸附,也存在多分子层吸附。
To facilitate Kaolin which was used to remove Cu2+from waste water,the stripped Kaolin was prepared by ball milling and the Fe3O4/Kaolin magnetic composite was prepared by oxidative precipitation method.The morphology and composition of Fe3O4/Kaolin magnetic composite were characterized by laser particle size analyzer,SEM and XRD,respectively.The saturation adsorption capacity and magnetic separation recovery of Cu2+was tested.It is demonstrated that 3.0g Fe3O4is the optimal amount as additive in Fe3O4/Kaolin magnetic composite to achieve improved adsorption ability(17.98 mg/g).The saturation magnetization reaches about 16.19emu/g by hysteresis loop,which shows excellent magnetic response.In addition,the adsorption data of the Fe3O4/Kaolin magnetic composite were fitted by Langmuir and Freundlich adsorption isotherm.It is found that the adsorption behavior of Fe3O4/Kaolin for Cu2+is basically consistent with the Langmuir adsorption isotherm model and the Freundlich adsorption isotherm model,indicating both monolayer adsorption and multi-layer adsorption are existed in the adsorption behavior of the Fe3O4/Kaolin magnetic composite for Cu2+.
作者
邢敏
雷西萍
韩丁
许静
刘戈辉
于婷
XING Min;LEI Xiping;HAN Ding;XU Jing;LIU Gehui;YU Ting(Materials and Minerals Institute,Xi’an University of Architecture and Technology,Xi’an 710055,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2019年第9期2204-2211,共8页
Acta Materiae Compositae Sinica
基金
陕西省教育厅重点实验室科研计划项目(16JS054)
