P204@Fe_(3)O_(4)@rGO复合萃取剂的制备及萃取Ho^(3+),Er^(3+)的实验研究  

Preparation of P204@Fe_(3)O_(4)@rGO Composite Extractant and Study on Extraction of Ho^(3+) and Er^(3+)

作　　者：郭天意 蒋旭娇 李勇 Guo Tianyi;Jiang Xujiao;Li Yong(Northeastern University,School of Metallurgy,Institute of Resources and Environment,Shenyang 110819,China)

机构地区：[1]东北大学冶金学院资源与环境研究所

出　　处：《中国稀土学报》2025年第1期129-138,共10页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(52074082)资助。

摘　　要：采用水热法制备了Fe_(3)O_(4)@rGO复合材料,然后以其为基体,通过浸渍法使P_(2)0_(4)负载在其表面上,制备出固相稀土萃取剂P_(2)0_(4)@Fe_(3)O_(4)@GO,并采用XRD,SEM,XPS,FT-IR,VSM对其表征。以其为萃取剂,分别对Ho^(3+)和Er^(3+)进行了萃取实验研究。探究了pH及时间等条件的影响,并对其进行了动力学的分析。实验结果表明:氧化石墨烯与FeCl_(3)·6H_(2)O质量比为1∶10时制备出的P_(2)0_(4)@Fe_(3)O_(4)@rGO复合材料性能最佳。且0.5g磁性P_(2)0_(4)@Fe_(3)O_(4)@rGO复合固相萃取剂对Ho^(3+)和Er^(3+)稀土溶液的萃取最佳条件为:萃取振荡时间分别为50,30min,pH分别为5.82,5.18,稀土初始浓度分别为0.001,0.002mol·L-1,Ho^(3+)和Er^(3+)分别可高达90%,97.5%。Ho^(3+),Er^(3+)的固相萃取复合准二级萃取动力学模型,表明为反应速率受化学吸附机理的控制。In this article,Fe_(3)O_(4)@r GO composite materials were prepared by hydrothermal method,and then P_(2)0_(4) was loaded on its surface by impregnation method to prepare a solid phase rare earth extractant P_(2)0_(4)@Fe_(3)O_(4)@r GO.The material was characterized by XRD,SEM,XPS,FT-IR VSM.Using it as an extractant,extraction experiments were conducted on Ho^(3+)and Er^(3+),respectively.The effect of p H,time and other conditions on the extraction is explored,and the kinetics is analyzed.The experimental results indicate that the P204@Fe_(3)O_(4)@rGO composite material prepared with a mass ratio of graphene oxide to FeCl_(3)·6H_(2)O of 1∶10 exhibits the best performance.The optimal conditions for the extraction of Ho^(3+)and Er^(3+)rare earth solutions with 0.5 g P204@Fe_3O_4@rGO composite solid-phase extraction agent are:extraction oscillation time of 50 and 30 min,p H of 5.82 and 5.18,initial rare earth concentrations of 0.001 and 0.002 mol·L^(-1),respectively.Extraction efficiency of Ho^(3+)and Er^(3+)can reach up to 90%and 97.5%,respectively.The solid phase extraction composite quasi second order extraction kinetic model of Ho^(3+)and Er^(3+)indicates that the reaction rate is controlled by the chemical adsorption mechanism.

关 键 词：氧化石墨烯 四氧化三铁 重稀土 固相萃取 

分 类 号：TF845.3[冶金工程—有色金属冶金]