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

doi:10.1016/j.cjche.2023.11.028

中国化学工程学报 ›› 2024, Vol. 69 ›› Issue (5): 112-121.DOI: 10.1016/j.cjche.2023.11.028

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

Huanxi Xu¹, Peihua Lin¹, Pei-Jun Liu¹, Hai-Gang Liu², Hui-Bin Guo², Chao-Xiang Wu², Ming Fang¹, Xu Zhang¹, Guan-Ping Jin¹

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

收稿日期:2023-04-12 修回日期:2023-11-16 出版日期:2024-05-28 发布日期:2024-07-01
通讯作者: Guan-Ping Jin,E-mail:jgp@hfut.edu.cn
基金资助:
This work was 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).

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

Huanxi Xu¹, Peihua Lin¹, Pei-Jun Liu¹, Hai-Gang Liu², Hui-Bin Guo², Chao-Xiang Wu², Ming Fang¹, Xu Zhang¹, Guan-Ping Jin¹

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

Received:2023-04-12 Revised:2023-11-16 Online:2024-05-28 Published:2024-07-01
Contact: Guan-Ping Jin,E-mail:jgp@hfut.edu.cn
Supported by:
This work was 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/Abstract

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 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 NH₄⁺ 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

Abstract: 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 NH₄⁺ 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.

Key words: Rubidium extraction, Potassium copper ferricyanide, Sulfonated polysulfone, Graphene oxide, Adsorption

Huanxi Xu, Peihua Lin, Pei-Jun Liu, Hai-Gang Liu, Hui-Bin Guo, Chao-Xiang Wu, Ming Fang, Xu Zhang, Guan-Ping Jin. Removal of rubidium from brine by an integrated film of sulfonated polysulfone/graphene/potassium copper ferricyanide[J]. 中国化学工程学报, 2024, 69(5): 112-121.

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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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