Efficient and selective recovery of Gd(Ⅲ)via polyethyleneimine modification of lanthanum-based metal-organic frameworks

作     者：Wenhao Li Lijinhong Huang Bin Xiao Xiaoguang Duan Haike Li Lang Li Wanfu Huang Wenhao Li;Lijinhong Huang;Bin Xiao;Xiaoguang Duan;Haike Li;Lang Li;Wanfu Huang

作者机构：Ganzhou Key Laboratory of Basin Pollution Simulation and ControlJiangxi University of Science and TechnologyGanzhou341000China Innovation Center for Water Quality Security Technology at Ganjiang River BasinJiangxi University of Science and TechnologyGanzhou341000China Faculty of Science and EngineeringWA School of Mines:MineralsEnergy and Chemical EngineeringCurtin UniversityWAAustralia School of Architecture and DesignJiangxi University of Science and TechnologyGanzhou341000China School of Resources and Architectural EngineeringGannan University of Science and TechnologyGanzhou341000China School of Chemical Engineering and Advanced MaterialsThe University of AdelaideAdelaideSA5005Australia School of Resource and Environmental EngineeringJiangxi University of Science and TechnologyGanzhou341000China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2024年第42卷第1期

页      面：210-219,I0007页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 080603[工学-有色金属冶金] 08[工学] 0806[工学-冶金工程] 0703[理学-化学] 

基　　金：Project supported by the National Natural Science Foundation of China(41662004) 

主　　题：Wet-impregnation method Polyethylene imine Metaleorganic frameworks Lanthanum Recovery of Gd(Ⅲ) Rare earths 

摘      要：With the development of the economy and the increasing demand for environmental protection,the efficient and selective recovery of Gd(Ⅲ)from actual wastewater is of critical *** this work,lanthanum-based metal-organic framework(LaBDC)materials were prepared by a hydrothermal method,and then polyethyleneimine(PEI)and LaBDC were combined by an impregnation method to form a novel LaBDC@xPEI *** prepared materials were characterized using Fourier transfo rm infrared spectroscopy(FTIR),X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDX),B runauer-Emmett-Teller(BET),thermogravimetric analysis(TGA)and X-ray photoelectron spectroscopy(XPS).Experiments show that LaBDC@50%PEI has the highest adsorption capacity(181.77 mg/g)among lanthanum-based MOFs with different PEI loadings at pH=5.5,which is about 5.1 times that of bare *** adsorption isotherm analysis shows that LaBDC@50%PEI follows the Langmuir *** addition,the adsorption kinetics of LaBDC@50%PEI follows a pseudo-second-order kinetic model,indicating that the adsorption process is chemical *** is worth noting that LaBDC@50%PEI maintains good adsorption performance and stability after three recycling tests,and exhibits excellent selectivity in cation interference ***,the LaBDC@50%PEI composites possess good stability and hold great promises in rapid recovery of Gd(Ⅲ)from practical aqueous environments.