Highly efficient and selective cesium recovery from natural brine resources using mesoporous Prussian blue analogs synthesized by ionic liquid-assisted strategy

Chen, Shangqing; Dong, Yanan; Wang, Honghong; Sun, Jingjing; Wang, Junfeng; Zhang, Suojiang; Dong, Haifeng

doi:10.1016/j.resconrec.2022.106542

Cited by 19 publications

(4 citation statements)

References 66 publications

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“…Then, GO was separated from the solution by filtration at the end of the adsorption experiments and the residual Cr(VI) concentration in the solution was determined at 540 nm by a UV–Vis spectrophotometer (UV756CRT, Shanghai Yoke Instrument Co., Ltd., Shanghai, China) using diphenylcarbonyldihydrazide spectrophotometry [ 31 ]. The adsorption capacity at a certain time ( Q t , mg/g) and at equilibrium time ( Q e , mg/g), and removal rate ( R , %) were calculated according to Equation (1) [ 32 ], Equation (2) [ 33 ] and Equation (3) [ 34 ]:

where C 0 (mg/L), C t (mg/L) and C e (mg/L) refer to the initial, time t and equilibrium concentrations of the Cr(VI) solution, respectively; m (g) denotes the dry weight of GO; V (L) represents the volume of the Cr(VI) solution.…”

Section: Methodsmentioning

confidence: 99%

Structural Properties of Graphene Oxide Prepared from Graphite by Three Different Methods and the Effect on Removal of Cr(VI) from Aqueous Solution

et al. 2023

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Herein, three types of graphene oxides (GOs, GO-M1, GO-M2 and GO-M3) have been successfully prepared from graphite by three different methods and utilized for the removal of Cr(VI) from aqueous solutions. Further, the effects of initial concentration and pH, adsorbent dosage, contact time and temperature on the adsorption performance of GOs were investigated by batch adsorption experiments. Furthermore, the adsorption mechanisms for Cr(VI) adsorption by GOs are mainly the redox reaction and electrostatic attraction, while there are also pore filling, ion exchange and complexation involved in these adsorption processes. The adsorption kinetic and isotherm data indicate that these adsorption processes of GOs on Cr(VI) are dominantly monolayer chemisorption and equilibrium can be reached in 30 min. The saturation adsorption capacities (Qm, 298.15 K) of GO-M1, GO-M2 and GO-M3 for Cr(VI) are estimated to be 3.5412 mg×g−1, 2.3631 mg×g−1 and 7.0358 mg g−1, respectively. Moreover, the adsorption thermodynamic study showed that these adsorption processes of Cr(VI) by the three types of GOs at 298.15 K to 323.15 K are endothermic, entropy-driven and thermodynamically spontaneous and feasible. Overall, these findings provided vital insights into the mechanism and application of Cr(VI) removal by GOs.

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Section: Methodsmentioning

confidence: 99%

Structural Properties of Graphene Oxide Prepared from Graphite by Three Different Methods and the Effect on Removal of Cr(VI) from Aqueous Solution

et al. 2023

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“…It is predicted that China's Qarhan salt lake contains at least 67000 tons of Cs 2 O. 4 Cesium ions in brines can be separated and enriched directly, avoiding the complicated roasting and leaching process. Thus, the exploration of effective and rational technologies for cesium extraction from brines is of great economic importance.…”

Section: Introductionmentioning

confidence: 99%

“…Cesium (Cs-133) is a valuable element that exhibits unique physicochemical properties, especially its exceptional thermal property and electrical conductivity, which makes it of great value for applications in fields such as electronics, energy storage, oil drilling, pharmaceuticals, and catalysts. − So far, cesium resources primarily rely on ores such as cesium garnet and lepidolite. However, solid ores are nonrenewable resources with limited reserves and apparent regional distribution differences.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the solid resources, abundant cesium cations also occur in oilfield brine, geothermal water, and in particular salt lake brine. It is predicted that China’s Qarhan salt lake contains at least 67000 tons of Cs 2 O . Cesium ions in brines can be separated and enriched directly, avoiding the complicated roasting and leaching process.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemically Selective Separation of Cesium Ion Using a Silicomolybdate Doped Polyaniline Composite

Bian,

Zhang,

Liu

et al. 2024

Ind. Eng. Chem. Res.

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Rational design of efficient adsorbents for recovering Cs + from complex brines is crucial for the sustainable industrial supply of cesium resources. Herein, a novel silicomolybdate doped polyaniline composite (SiMo 12 −PANI) was facilely prepared and used for extracting Cs + via the electrochemical process for the first time. Silicomolybdic acid contains abundant oxygen sites and can be used as a receptor of Cs + . The morphology and chemical structure of the composite were fully characterized, and the effects of potential, ion concentration, and solution pH in the electrochemical separation Cs + process were further studied. The results revealed that the SiMo 12 −PANI electrode exhibited a relatively fast ad/desorption kinetics of Cs + due to the intensifying effect of the electric field. The adsorption capacity can be increased from 14.4 mg•g −1 to 24.9 mg•g −1 at the initial cesium concentration of 50 mg•L −1 , and the desorption ratio was also improved. In particular, the separation factors of Cs + over K + , Rb + , Ca 2+ , and Mg 2+ can reach 11.7−16, 2.1−2.3, 205−726, and 622−708, respectively. XPS results confirmed that the excellent selectivity for Cs + was achieved by ultra-affinity of oxygen donors toward Cs + , and the reversible capture and release of Cs + may be achieved by the driving force of the electric field and the redox reaction between Mo 6+ and Mo 5+ . It is expected that our work may provide a green and sustainable approach for selective recovery of Cs + from complex solutions using a novel silicomolybdate doped polyaniline composite via an electrochemical process.

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Prussian blue composites for Cs adsorption – modification of the method and modelling of the adsorption processes

Lujaniené

Novikau²,

Leščinskytė³

et al. 2022

J Radioanal Nucl Chem

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Highly efficient and selective cesium recovery from natural brine resources using mesoporous Prussian blue analogs synthesized by ionic liquid-assisted strategy

Cited by 19 publications

References 66 publications

Structural Properties of Graphene Oxide Prepared from Graphite by Three Different Methods and the Effect on Removal of Cr(VI) from Aqueous Solution

Structural Properties of Graphene Oxide Prepared from Graphite by Three Different Methods and the Effect on Removal of Cr(VI) from Aqueous Solution

Electrochemically Selective Separation of Cesium Ion Using a Silicomolybdate Doped Polyaniline Composite

Prussian blue composites for Cs adsorption – modification of the method and modelling of the adsorption processes

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