Highly efficient separation of Sc^(3+) and Y^(3+) in acid solution by a graphene oxide membrane with interlayer sieving  

作　　者：Huixiong Jiang Jin-Hang Liu Xiudong Chen Xiaohua Cao Xiushen Ye Guosheng Shi 

机构地区：[1]School of Chemistry and Chemical Engineering,Jiangxi Province Engineering Research Center of Ecological Chemical Industry,Jiujiang University,Jiujiang,332005,China [2]Shanghai Applied Radiation Institute,State Key Lab.Advanced Special Steel,Shanghai University,Shanghai,200444,China [3]Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,China

出　　处：《Journal of Rare Earths》2024年第11期2166-2171,I0006,共7页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (U1932123,12105166,22065017,22163003);the National Science Fund for Outstanding Young Scholars (11722548);the Jiangxi Provincial Natural Science Foundation (20224BAB214019,20232BAB204024,20232BAB203024);Science and Technology Project of Jiangxi Provincial Department of Education(GJJ2201937)。

摘　　要：Sc and Y are key rare earth elements and are widely used in lamp phosphors,lasers and high-performance alloys.However,highly efficient extraction and separation of Sc^(3+) and Y^(3+) is laborious,harmful,slow,and costly,strongly necessitating more efficient extraction and separation techniques.Here,we produced hydrated Sc^(3+)-and hydrated Y^(3+)-controlled graphene oxide(GO) membranes and find that both hydrated cations were completely self-rejected by the membrane.By combining this selfrejection effect of the larger hydrated Y^(3+)-controlled GO membrane and the rapid passage of the membrane through the smaller hydrated Sc^(3+),we proposed a strategy to separate Sc^(3+) and Y^(3+) by using a hydrated Y^(3+)-controlled GO membrane.The experimental results show that the permeation rate of Sc^(3+) exceeds that of Y^(3+) when the separation factor reaches 4.02,which can be attributed to the interlayer sieving effects of the GO membrane.Our finding illustrates the use of a forward osmosis process with a GO membrane for the efficient separation of Sc^(3+) and Y^(3+) by interlayer sieving,which provides a new effective and eco-friendly method for the separation of rare earth elements.

关 键 词：Rare earths Graphene oxide membrane Interlayer spacing Membrane separation Forward osmosis 

分 类 号：TQ133.3[化学工程—无机化工] TQ028.8