稀土镧铁氧体的制备及其对La^(3+)吸附性能的研究

Preparation of Lanthanum Ferrite and Studies on the Adsorption of Lanthanum Ion

采用化学共沉淀法制备了稀土镧铁氧体。考察其对稀土离子La3+吸附性能,并用偶氮胂Ⅲ直接吸光光度法对其进行吸附性能测试。详细探讨了温度、pH值、超声时间和镧离子浓度对稀土镧铁氧体吸附性能的影响,结果表明:稀土镧铁氧体对La3+离子吸附的适宜条件为:吸附温度T=45℃,溶液pH=6.00,La3+离子的初始浓度10 mg/L,用量5.517g/L,吸附时间超声45 min即可达到吸附平衡;该条件下吸附效果较好Qmax=0.921 6 mg/g其吸附行为符合吸附动力学方程,同时满足Langmuir和Freundlich等温式。

Lanthanum ferrite were prepared by recipitation.The adsorption performance of La3 ＋ ion on the lanthanum ferrite was studied and spectrophotometric with arsenazo determined it＇s adsorption performance.The effect of temperature,pH value,adsorption time and concentration of La3 ＋ ion on the adsorption performance of lanthanum ferrite was also investigated in detail.It is found that the best process conditions of lanthanum ferrite adsorbing La3 ＋,which is temperature with 45 ℃,pH value with 6.00,concentration of La3 ＋ with 10 mg / L,adsorption time with 45 min that got adsorption equilibrium.It＇s adsorption behavior is coincided with the equation of Langmuir and Freundlich.