Solid-phase extraction and separation of heavy rare earths from chloride media using P227-impregnated resins

作     者：Bin Yang Suo-Zhi Wu Xin-Yu Liu Zeng-Xin Yan Yu-Xue Liu Qi-Song Li Feng-Shan Yu Jun-Lian Wang Bin Yang;Suo-Zhi Wu;Xin-Yu Liu;Zeng-Xin Yan;Yu-Xue Liu;Qi-Song Li;Feng-Shan Yu;Jun-Lian Wang

作者机构：School of Civil and Resource EngineeringUniversity of Science and Technology BeijingBeijing 100083China Jiangxi Province Han’s Precious Metals Co.LtdShangrao 335500China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2021年第40卷第9期

页      面：2633-2644页

核心收录：

学科分类：080603[工学-有色金属冶金] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51974026 and 21301104) the National Key R&D Program of China(No.2018YFC1900604) the Fundamental Research Funds for the Central Universities(No.FRF-TP-16019A3) 

主　　题：Solid-phase extraction Solvent-impregnated resins P227 Heavy rare earths 

摘      要：A solid-phase extraction resin SIRs-P227/XAD-7 HP was prepared by impregnating extractant P227 onto macroporous resin XAD-7 HP beads. SIRs-P227/XAD-7 HP beads were characterized by Fourier transform infrared spectroscopy(FTIR) and scanning electron microscopy(SEM) equipped with energy-dispersive spectroscopy(EDS). The adsorption kinetics, particle size effect,adsorption isotherm, pH_(equilibrium)–lg D relationship(where D is distribution coefficient), desorption, adsorption selectivity for heavy rare earths, and impurity ions were studied. The results showed that the adsorption kinetics of Lu(III) on the SIRs-P227/XAD-7 HP beads fitted the Morris–Weber model best. The adsorbance decreased as the particle size increased. The pH_(equilibrium)–lg D relationship fitted well with a straight line, and the slope was 1.56. The experimental data fitted well with Langmuir *** calculated maximum adsorption capacity was23.8 mg·g^(-1), while the experimental datum was22.7 mg·g^(-1) at the given conditions. The adsorbed Lu(III)can be easily stripped by 0.1 mol·L^(-1) HCl. The adsorption selectivity of SIRs-P227/XAD-7 HP for heavy REs exhibited the following order: LuYbTmErHo. The adjacent heavy rare earth(RE) separation factors β_(Lu/Yb),β_(Yb/Tm), β_(Tm/Er), and β_(Er/Ho)were 1.57, 3.00, 3.03, and 2.23,respectively, at liquid/solid ratio(L/S) equal to 3:20. The adsorption selectivity for impurity ions exhibited the followingorder:Fe LuTmZnMgCaHoCoNiCuAl.