Highly ordered macroporous silica dioxide framework embedded with supramolecular as robust recognition agent for removal of cesium

Dai, Ying; Lv, Riwen; Fan, Jing; Peng, Hong; Zhang, Zhibin; Cao, Xiaohong; Liu, Yuhui

doi:10.1016/j.jhazmat.2019.121467

Cited by 30 publications

(4 citation statements)

References 65 publications

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“…In addition, from the point of improving the utilization of uranium resources, the separation and enrichment of U(VI) from wastewater are of great practical significance ( Zou et al., 2020 ). Plenty of studies have shown that adsorption has the advantages of high efficiency, low cost, and simple operation, and it is currently one of the most common and effective methods for separating and enriching U(VI) from water samples ( Dai et al., 2020 ; Wang et al., 2016 ; Zhu et al., 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Hydrolytically stable foamed HKUST-1@CMC composites realize high-efficient separation of U(VI)

et al. 2021

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Summary HKUST-1@CMC (HK@CMC) composites that show good acid and alkali resistance and radiation resistance were successfully synthesized by introducing carboxymethyl cellulose (CMC) onto the surface of HKUST-1 using a foaming strategy. For the first time, the composites were explored as efficient adsorbents for U(VI) trapping from aqueous solution, with encouraging results of large adsorption capacity, fast adsorption kinetics, and desirable selectivity toward U(VI) over a series of competing ions. More importantly, a hybrid derivative film was successfully prepared for the dynamic adsorption of U(VI). The results show that ∼90% U(VI) can be removed when 45 mg L −1 U(VI) was passed through the film one time, and the removal percentage is still more than 80% even after four adsorption-desorption cycles, ranking one of the most practical U(VI) scavengers. This work offers new clues for application of the Metal-organic-framework-based materials in the separation of radionuclides from wastewater.

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Section: Introductionmentioning

confidence: 99%

Hydrolytically stable foamed HKUST-1@CMC composites realize high-efficient separation of U(VI)

et al. 2021

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“…It is noteworthy that this phenomenon is quite different from the reported results. The Cs + adsorption properties of most Cs + scavengers such as MOFs, clay minerals, and even some metal sulfide materials are significantly weakened by competing ions, especially high-valency ions 13 , 37 , 39 – 41 . Some metal sulfide ion-exchange materials containing protonated organic amines can also capture Cs + after K + activation, but their capturing performance is also very susceptible to competing ions 40 , 42 , 43 .…”

Section: Resultsmentioning

confidence: 99%

“Ion-imprinting” strategy towards metal sulfide scavenger enables the highly selective capture of radiocesium

Tang,

Jia,

Liu

et al. 2024

Nat Commun

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Highly selective capture of radiocesium is an urgent need for environmental radioactive contamination remediation and spent fuel disposal. Herein, a strategy is proposed for construction of “inorganic ion-imprinted adsorbents” with ion recognition-separation capabilities, and a metal sulfide Cs2.33Ga2.33Sn1.67S8·H2O (FJSM-CGTS) with “imprinting effect” on Cs+ is prepared. We show that the K+ activation product of FJSM-CGTS, Cs0.51K1.82Ga2.33Sn1.67S8·H2O (FJMS-KCGTS), can reach adsorption equilibrium for Cs+ within 5 min, with a maximum adsorption capacity of 246.65 mg·g−1. FJMS-KCGTS overcomes the hindrance of Cs+ adsorption by competing ions and realizes highly selective capture of Cs+ in complex environments. It shows successful cleanup for actual 137Cs-liquid-wastes generated during industrial production with removal rates of over 99%. Ion-exchange column filled with FJMS-KCGTS can efficiently treat 540 mL Cs+-containing solutions (31.995 mg·L−1) and generates only 0.12 mL of solid waste, which enables waste solution volume reduction. Single-crystal structural analysis and density functional theory calculations are used to visualize the “ion-imprinting” process and confirm that the “imprinting effect” originates from the spatially confined effect of the framework. This work clearly reveals radiocesium capture mechanism and structure-function relationships that could inspire the development of efficient inorganic adsorbents for selective recognition and separation of key radionuclides.

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“…The van’t Hoff and thermodynamic parameters are shown in Table 5 , and the van’t Hoff, shown in Figure 11 , is found to be fine linear. The negative ΔG at different temperatures verify the spontaneity and feasibility of the adsorption, and indicate that the adsorption capacity of the adsorbent for Cs + has a higher driving force at high temperatures [ 32 ]. A positive value of ΔH indicates that the adsorption process is endothermic.…”

Section: Resultsmentioning

confidence: 99%

Adsorption Behavior and Mechanism of Cesium Ions in Low-Concentration Brine Using Ammonium Molybdophosphate–Zirconium Phosphate on Polyurethane Sponge

Wang

Zhang

et al. 2023

Materials

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Salt lake brine originating from Qinghai, China has abundant cesium resources and huge total reserves. The inorganic ion exchangers ammonium molybdophosphate (AMP) and zirconium phosphate (ZrP) have the significant advantages of separating and extracting Cs+ as a special adsorbent. Nevertheless, their high solubility in water leads to a decrease in their ability to adsorb Cs+ in aqueous solutions, causing problems such as difficulty with using adsorbents alone and a difficult recovery. In this work, an environmentally friendly polyurethane sponge (PU sponge) with a large specific surface area is employed as an adsorbent carrier by physically impregnating dopamine-coated AMP and ZrP onto a PU sponge, respectively. The experiment found that under the same conditions, the AMP/PU sponge performs better than the ZrP/PU sponge for Cs+ adsorption. When the amount of adsorbent reaches 0.025 g, the adsorption capacity reaches saturation. The adsorption efficiency remains above 80% when the concentration of Cs+ is 5–35 mg/L. The kinetic calculations show that adsorption is spontaneous, feasible, and has a higher driving force at high temperatures. In addition, the power and mechanism of the interaction between adsorbent and adsorbent are explained using the density functional theory calculation. This efficient, stable, and selective Cs+ adsorbent provides design guidelines.

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Highly ordered macroporous silica dioxide framework embedded with supramolecular as robust recognition agent for removal of cesium

Cited by 30 publications

References 65 publications

Hydrolytically stable foamed HKUST-1@CMC composites realize high-efficient separation of U(VI)

Hydrolytically stable foamed HKUST-1@CMC composites realize high-efficient separation of U(VI)

“Ion-imprinting” strategy towards metal sulfide scavenger enables the highly selective capture of radiocesium

Adsorption Behavior and Mechanism of Cesium Ions in Low-Concentration Brine Using Ammonium Molybdophosphate–Zirconium Phosphate on Polyurethane Sponge

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