Fe3O4/Mg（OH）2复合材料的制备及对铅离子的移除应用

Preparation of Fe3O4/Mg（OH）2 Composites and its Application in Removing Lead Ions from Aqueous Solutions

通过种子沉积法制备出Fe3O4/Mg(OH)2复合材料并进行了XRD、SEM、TEM、SAED测试分析。将该复合材料对水溶液中Pb2+进行移除应用实验,接触时间为240 min时达到平衡。平衡时,水溶液中的Pb2+超过90%被移除,移除量为950.8 mg/g。通过动力学研究发现,移除过程符合准二级动力学模型,这意味着移除过程中可能为化学吸附及沉淀过程。

Fe3O4/Mg(OH)2,a kind of novel composites were prepared by seed deposition method in this paper.The structures of composites were analyzed by XRD,SEM,TEM and SAED,and the removal of Pb2+ ions in aqueous solutions was investigated.The results indicated that the removal equilibrium could be achieved at the contact time of 240 min,and the removal efficiency for the Pb2+ ions was more than 90%,with a high removal capacity of 950.8 mg/g.The removal kinetic accorded with the quasi-two kinetic model,which showed a chemical adorption and precipitation process involved in removed.