纳米级四氧化三铁回收水中铅离子实验  

The study for adsorption of lead by nano Fe3O4

作　　者：许端平 陈丽媛 孔岳 XU Duan-ping;CHEN Li-yuan;KONG Yue(College of Environmental Science and Engineering,Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]辽宁工程技术大学环境科学与工程学院,辽宁阜新123000

出　　处：《应用化工》2021年第1期75-77,82,共4页Applied Chemical Industry

基　　金：国家重点研发计划(2019YFC1803801)。

摘　　要：采用共沉淀法制备了纳米级四氧化三铁,考察pH值、温度对铅吸附的影响及吸附动力学和吸附等温模型。结果表明,准二级动力学方程能更好地描述纳米级四氧化三铁对铅的吸附动力学过程,反应分为快速吸附阶段、慢速吸附阶段和吸附平衡阶段。pH对四氧化三铁吸附铅的过程有着明显的影响,pH过低会导致四氧化三铁对铅的吸附量降低。温度会影响四氧化三铁对铅的吸附量,温度越高,吸附量越小。Langmuir方程更适合描述四氧化三铁对铅的吸附行为,该过程为化学吸附。Using the coprecipitation method to prepare nano Fe3O4.The effects of pH and temperature on lead adsorption,and the adsorption kinetics and adsorption isothermal model were investigated.The results show that pseudo-second-order model can be described the adsorption kinetics process of lead by nano Fe3O4 better and the reaction is divided into three stages:fast adsorption,slow adsorption and adsorption equilibrium.pH has a significant effect on the adsorption of lead by nano Fe3O4.Low pH will lead to a decline in the adsorption of lead by nano Fe3O4.Temperature will affect the adsorption amount of nano Fe3O4 on lead.The higher temperature can make the adsorption amount smaller.Langmuir equation is more suitable to describe the adsorption behavior of nano Fe3O4 on lead and the process is a kind of chemical adsorption.

关 键 词：重金属 铅 四氧化三铁 吸附 

分 类 号：TQ9[化学工程] TQ11