Preferential extraction of rubidium from high concentration impurity solution by solvent extraction and preparation of high-purity rubidium salts

Lv, Yingwei; Liu, Yubo; Ma, Baozhong; Wang, Chengyan; Chen, Yongqiang

doi:10.1016/j.desal.2022.116162

Cited by 19 publications

(5 citation statements)

References 41 publications

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“…Other diluents, such as cyclohexane, ShellSol D70, and xylene, were also recommended. [167][168][169] However, these systems have only been applied to salt-lake brine or ore solutions , therefore, they are not discussed further here.…”

Section: Rubidium/cesiummentioning

confidence: 99%

Total Resource Circulation of Desalination Brine: A Review

Lee,

Ho,

Chen

et al. 2024

Advanced Sustainable Systems

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Desalination brine is a concentrated stream that is generated during the desalination process. Brine commonly has high salinity and TDS (total dissolved ions), which contains ions such as Na+, K+, Ca2+, Mg2+, Cl−, SO42−, HCO3−, PO43−, and some critical elements. Currently, the brine treatment mainly applies direct disposal, like surface water discharge, sewer discharge, deep‐well injection, and evaporation ponds. However, these methods can cause harm to marine ecosystems, soil, and groundwater. Therefore, brine can be regarded as a resource to be reutilized. This work then aims to highlight the novel developments of brine application. For example, Na, Ca, and Mg in brine can be employed for carbon capture and utilization with ammonia, amines, and alkaline substances. With slight adjustment, brine can also be directly used as irrigation water, aquaculture water, and the activation of biochar. Furthermore, brine holds a higher concentration of critical elements, which makes many countries and scholars start to conduct element extraction, reducing the amount of ore exploitation. At last, the major obstacles related to these advancements in sustainability, expenses, and technological aspects are outlined, and promising research trends of brine reutilization are also suggested.

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Section: Rubidium/cesiummentioning

confidence: 99%

Total Resource Circulation of Desalination Brine: A Review

Lee,

Ho,

Chen

et al. 2024

Advanced Sustainable Systems

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“…7 With the exhaustion of mineral resources and the development of saline lake brines, the derivation and enrichment of Rb from saline lake brines have become a focus of considerable research. 8 Precipitation, 9 solvent extraction, 10 membrane separation, 11 and adsorption 12 are a few of the documented technologies. Of these, adsorption is extensively employed due to its operational simplicity, superior effectiveness, and selective extraction of low concentrations of Rb from saline lake brines.…”

Section: Introductionmentioning

confidence: 99%

Recovery of Rubidium Using Hydrogel Beads Encapsulating Potassium Copper Hexacyanoferrate from Saline Lake Brines

Chu,

Yuan,

Lin

et al. 2024

Ind. Eng. Chem. Res.

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A handy hydrogel bead adsorbent of graphene oxide/poly(vinyl alcohol)/sodium alginate/carboxymethyl cellulose encapsulating potassium copper hexacyanoferrate (KCuFC) was fabricated via injection devices (GPSC-KCuFC), which can be employed for recovering rubidium (Rb) resources from saline lake brines. The successful loading of KCuFC on GPSC was substantiated by the microstructure observed using scanning electron microscopy, the chemical composition derived with Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy, and the lattice structure analyzed by X-ray diffraction. Depending on diverse pH values, adsorption times, temperatures, initial concentrations, and types of competing ions, batch tests were carried out. The GPSC-KCuFC has been shown to acquire a maximum adsorption capacity of 242.91 mg/g for Rb+ at 45 °C with pH = 8, and the Langmuir isotherm model can explain the adsorption behavior. Likewise, the process of Rb+ adsorption is in accordance with the pseudo-second-order model, while manifesting the three-stage intraparticle diffusion model. The GPSC-KCuFC exhibits remarkable reusability as evidenced by five adsorption–desorption cycles. Besides, the GPSC-KCuFC shows promising selectivity for Rb+ adsorption from saline lake brines. Subsequently, anion exchange membrane electrolysis can derive a higher purity solution of Rb+.

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“…Its principle is the ion exchange between the H + of phenolic hydroxyl groups and Rb + . [6][7][8][9] Fang et al prepared a new composite adsorbent phenol@MIL-101(Cr) through impregnation technology. 10 The composite adsorbent achieved efficient enrichment of Rb + in solution through acidic proton exchange between phenol groups and Rb + , and the enrichment process belonged to a typical solid-liquid heterogeneous adsorption.…”

Section: Introductionmentioning

confidence: 99%

“…Rubidium (Rb) is a kind of rare and precious metal with good plasticity and ductility, which can produce photoelectric effect and is widely used in many high‐tech fields 1–3 . The traditional methods of extracting Rb usually have some disadvantages, such as complex process, poor selectivity, high consumption of organic solvent, and so on 4–6 . Therefore, the development of an environmentally friendly and rapid Rb adsorption material to quickly and efficiently complete the separation and purification of Rb + has important economic value and environmental significance.…”

Section: Introductionmentioning

confidence: 99%

“…4‐Tert‐butyl‐2‐(α‐methylbenzyl) phenol ( t ‐BAMBP) is a typical Rb + extractant and is widely used in liquid–liquid extraction processes. Its principle is the ion exchange between the H + of phenolic hydroxyl groups and Rb + 6–9 . Fang et al prepared a new composite adsorbent phenol@MIL‐101(Cr) through impregnation technology 10 .…”

Section: Introductionmentioning

confidence: 99%

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Preparation of MOR/P(S‐co‐VPh) nanofiber composite membrane and its adsorption properties for rubidium ions

Fei,

Shi,

Wang

et al. 2024

J of Applied Polymer Sci

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Rubidium (Rb), a rare and precious metal, is widely used in high‐tech fields. In this work the structural advantages of mordenite (MOR) and group affinity of phenolic hydroxyl polymers (poly (styrene‐4‐hydroxystyrene) (P(S‐co‐VPh)) are combined to prepare MOR/P(S‐co‐VPh) nanofiber composite membranes with high selectivity and adsorption specificity for Rb+ by electrospinning. The test results show that MOR is successfully anchored on the nanofiber substrate and maintained its complete crystal structure. Adsorption experiments show that the adsorption capacity of Rb+ increases with the increase of MOR content, and pH = 9.0, T = 25°C are the best adsorption conditions. K+ shows the most obvious interference with the adsorption capacity decreased from 60.03 to 39.33 mg/g. The adsorption process follows with the Langmuir isothermal model and pseudo‐second‐order kinetic equation. The chemical adsorption based on the coordination reaction is the control step, and the intraparticle diffusion also has an important effect on the adsorption rate. The recycling test indicates that the prepared nanofiber composite membrane not only has efficient adsorption of Rb+, but also exhibits excellent regeneration and stability, which helps to achieve its widespread application and long‐term operation in harsh environments.

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Preferential extraction of rubidium from high concentration impurity solution by solvent extraction and preparation of high-purity rubidium salts

Cited by 19 publications

References 41 publications

Total Resource Circulation of Desalination Brine: A Review

Total Resource Circulation of Desalination Brine: A Review

Recovery of Rubidium Using Hydrogel Beads Encapsulating Potassium Copper Hexacyanoferrate from Saline Lake Brines

Preparation of MOR/P(S‐co‐VPh) nanofiber composite membrane and its adsorption properties for rubidium ions

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