Removal of rubidium from brine by an integrated film of sulfonated polysulfone/graphene/potassium copper ferricyanide  

作　　者：Huanxi Xu Peihua Lin Pei-Jun Liu Hai-Gang Liu Hui-Bin Guo Chao-Xiang Wu Ming Fang Xu Zhang Guan-Ping Jin 

机构地区：[1]Anhui Province Engineering Research Center of Flexible and Intelligent Materials,School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,China [2]Chemical Design and Research Institute Co.,LTD of Qinghai Province,Qinghai Engineering and Technology Research Center of Fine Chemical,Xining 810008,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第5期112-121,共10页中国化学工程学报（英文版）

基　　金：supported by the Ministry of Science and Technology of China(Science and Technology to Boost Economy 2020 Key Project,SQ2020YFF0412719 and SQ2020YFF0404901);The Key Research and Development and Transformation Program Funding in Qinghai Province(2021-GX-105);Major projects of Anhui Province and Anhui Province Key Research and Development Plan(202104e11020005)。

摘　　要：A novel integrated film of sulfonated polysulfone/graphene/potassium copper ferricyanide(KCuFC/SPSG)was used for selectively extracting rubidium ion(Rb^(+))from brine.To form KCuFC/SPSG,the precursor film of sulfonated polysulfone/graphene(SPSG)was synthesized by phase conversion process,which was alternately immersed in 0.1 mol·L^(-1)CuSO_(4)/K_(4)[Fe(CN)_(6)]by in-situ adsorption coupled co-precipitation method.Various data such as nuclear magnetic resonance spectrometer,Fourier transform infrared spectroscope,X-ray photoelectron spectroscope,X-ray diffraction,scanning electron microscope,and energy dispersive spectroscopy all verified that abundant KCuFC were uniformly located on the film.The resulting KCuFC/SPSG was used in film separation system.As the solution was fed into the system,the Rb^(+)could be selectively adsorption by KCuFC/SPSG.After the saturation adsorption,0.5 mol·L^(-1)NH_(4)Cl/HCl was fed into the film cell,Rb^(+)could be quickly desorbed by ion-exchange between Rb^(+)and NH_(4)^(+)in the lattice of KCuFC.The purpose of separating and recovering Rb^(+)from the brine can be achieved after the repeated operation.The effects of pH,adsorption time,and interferential ions on the adsorption capacity of Rb^(+)were investigated by batch experiments.The adsorption behavior fits the pseudo-second order kinetic process,while KCuFC has a higher adsorption capacity(Langmuir maximum sorption 165.4 mg·g^(-1)).In addition,KCuFC/SPSG shows excellent selectivity for Rb^(+)even in complex brine systems.KCuFC/SPSG could maintain 93.5%extraction efficiency after five adsorption/desorption cycles.

关 键 词：Rubidium extraction Potassium copper ferricyanide Sulfonated polysulfone Graphene oxide Adsorption 

分 类 号：TS396.5[轻工技术与工程] O647.3[理学—物理化学]