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

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

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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 CuSO4/K4[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 NH4Cl/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 sys-tems.KCuFC/SPSG could maintain 93.5％extraction efficiency after five adsorption/desorption cycles.

Rubidium extractionPotassium copper ferricyanideSulfonated polysulfoneGraphene oxideAdsorption

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

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Anhui Province Engineering Research Center of Flexible and Intelligent Materials,School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,China

Chemical Design and Research Institute Co.,LTD of Qinghai Province,Qinghai Engineering and Technology Research Center of Fine Chemical,Xining 810008,China

Ministry of Science and Technology of China(Science and Technology to Boost Economy 2020 Key Project)Ministry of Science and Technology of China(Science and Technology to Boost Economy 2020 Key Project)Key Research and Development and Transformation Program Funding in Qinghai ProvinceMajor projects of Anhui Province and Anhui Province Key Research and Development Plan

SQ2020YFF0412719SQ2020YFF04049012021-GX-105202104e11020005

2024

10.1016/j.cjche.2023.11.028

中国化学工程学报(英文版)
中国化工学会

中国化学工程学报(英文版)

CSTPCDEI
影响因子：0.818
ISSN：1004-9541
年,卷(期)：2024.69(5)
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