磁性氧化石墨烯对水溶液中铀(Ⅵ)的吸附性能研究  

Adsorption of U (Ⅵ) inaqueous solution by magneticgraphene oxide

作　　者：杨铁春 王攀峰[2] 高豹 王琳[2] 曹小红[2] 

机构地区：[1]清远市公安局刑警支队理化室,广东清远511518 [2]东华理工大学,江西南昌330013

出　　处：《江西化工》2013年第4期153-158,共6页Jiangxi Chemical Industry

摘　　要：采用FeCl3作为磁流体制备磁性氧化石墨烯。考察了溶液pH值、溶液初始浓度、吸附温度和吸附时间对磁性氧化石墨烯吸附铀(VI)性能的影响,并探讨了吸附热力学、等温吸附性能和动力学。结果表明:磁性氧化石墨烯吸附铀(VI)的最佳pH值为7.0,吸附平衡时间为180min,298K时饱和吸附容量为113.27 mg/g。吸附行为符合Langmuir等温吸附模型和准二级吸附动力学模型,即表明吸附主要是受化学作用控制。The effect of solution pH value, initial concentration, temperature and time on the adsorption of U （VI） in aqueous solutionby magneficgraphene oxidecoated with FeCL3 was studied, and the adsorption tbermedynamic, dynamics and isotherm were investigated. The results indicated that the best adsorption pH value was 7.0, the adsorption equilibrium time was 180min and the saturated adsorption capacity was 113.27 mg/g at 298K. The U（VI） sorption on the magneticgraphene oxidewere fitted to Langmuir adsorption isothermal and the pseudo - second kinetics models, which indicated the ad- sorptions were mainly controlled by chemical action.

关 键 词：氧化石墨烯 磁性 铀 吸附 

分 类 号：O647.3[理学—物理化学] X591[理学—化学]