In situ Preparation of Chitosan/ZIF-8 Composite Beads for Highly Efficient Removal of U(VI)

Liu, Lijuan; Yang, Weiting; Gu, Dongxu; Zhao, Xiaojun; Pan, Qinhe

doi:10.3389/fchem.2019.00607

Cited by 60 publications

(18 citation statements)

References 52 publications

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“…), porosity and pore size, and the specific surface area of adsorbent affect the adsorption kinetics and the amount of removed from aqueous solutions. According to the literature [ 31 , 54 , 55 ], chitosan contains amine (–NH 2 ) and hydroxyl (–OH), which can be used as coordination sites to form complexes with various heavy metal ions, so it can be used as an excellent biosorbent for heavy metals. In this study, the prepared adsorbent was EDTA–chitosan microspheres containing ZIF-8 on the surface.…”

Section: Resultsmentioning

confidence: 99%

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Adsorption of REEs from Aqueous Solution by EDTA-Chitosan Modified with Zeolite Imidazole Framework (ZIF-8)

Feng

Bat-Amgalan

et al. 2021

IJMS

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Chitosan (CS) modified with ethylenediamine tetraacetic acid (EDTA) was further modified with the zeolite imidazole framework (ZIF-8) by in situ growth method and was employed as adsorbent for the removal of rare-earth elements (REEs). The material (EDTA–CS@ZIF-8) and ZIF-8 and CS were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), and nitrogen adsorption/desorption experiments (N2- Brunauer–Emmet–Teller (BET)). The effects of adsorbent dosage, temperature, the pH of the aqueous solution, contact time on the adsorption of REEs (La(III), Eu(III), and Yb(III)) by EDTA–CS@ZIF-8 were studied. Typical adsorption isotherms (Langmuir, Freundlich, and Dubinin–Radushkevich (D-R)) were determined for the adsorption process, and the maximal adsorption capacity was estimated as 256.4 mg g−1 for La(III), 270.3 mg g−1 for Eu(III), and 294.1 mg g−1 for Yb(III). The adsorption kinetics results were consistent with the pseudo-second-order equation, indicating that the adsorption process was mainly chemical adsorption. The influence of competing ions on REE adsorption was also investigated. After multiple cycles of adsorption/desorption behavior, EDTA–CS@ZIF-8 still maintained high adsorption capacity for REEs. As a result, EDTA–CS@ZIF-8 possessed good adsorption properties such as stability and reusability, which have potential application in wastewater treatment.

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Section: Resultsmentioning

confidence: 99%

“…According to reports, zeolitic imidazolate framework-8 can effectively adsorb and remove Cr(VI) ions in aqueous solutions [ 30 ]. In addition, there are studies on preparing chitosan/ZIF-8 composite beads to efficiently remove U(VI) [ 31 ]. However, few studies used ZIF-8-modified chitosan as an adsorbent for rare-earth elements.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of REEs from Aqueous Solution by EDTA-Chitosan Modified with Zeolite Imidazole Framework (ZIF-8)

Feng

Bat-Amgalan

et al. 2021

IJMS

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“…On account of ease of functionalization, ZIFs can be further tuned to incorporate functional chemical groups with an intention of achieving the novel architecture with intended outcomes. [73] Interestingly, the open framework type architecture of ZIFs also provides a great opportunity to further attune and upgrade the parameters of electrocatalyst related to the electrocatalytic reaction, leading to the enhanced and optimal electrocatalytic performance. [74] The large pore volume of ZIFs facilitates the swift diffusion of reactants as well as products through their channels.…”

Section: Application Of Zifs In Zabsmentioning

confidence: 99%

Section: Zn–air Batteries Oxygen Electrocatalysis Metal‐organic Framework and Zeolite Imidazolate Frameworkmentioning

confidence: 99%

Advances in Zeolite Imidazolate Frameworks (ZIFs) Derived Bifunctional Oxygen Electrocatalysts and Their Application in Zinc–Air Batteries

Arafat

Azhar

Zhong

et al. 2021

Advanced Energy Materials

139

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The fast growth in human population and the quick cultural advancement of human society leads to the tremendous increase in energy demand. [1] During the past, fossil fuels were used as the main energy sources, while their excessive use based on the conventional combustion technology releases excessive greenhouse gases into the environment, causing adverse impact on the sustainability of ecosystem. To cope with the challenges of stringent environmental legislations and the reliance on fossil fuels, renewable Secondary Zn-air batteries (ZABs) are recognized as one of the most promising power sources for the future with lucrative features of low cost, high energy density, eco-friendliness, and high safety. However, the widespread implementation of ZABs is still hampered by the sluggish oxygen redox reactions. Thus the deployment of cost-effective and highly efficient air electrodes to substitute precious metals (Pt/Ir), is highly challenging, however, highly desired. Zeolitic imidazolate frameworks (ZIFs) are emerging functional materials, which demonstrate several outstanding characteristics, such as high specific surface area, high conductivity, self-doped N, open pore structure, versatile compositions and favourable chemical stability. Through varying the metal/organic moiety or by employing different synthesis protocols, ZIFs with different properties could be obtained. Being adaptable, desired functionalities may be further incorporated into ZIFs through pre-treatment, in situ treatment, and post treatment. Thus, ZIFs are the ideal precursors for the preparation of variety of bi-functional air electrodes for ZABs by materials tuning, morphological control, or by materials hybridization. Here, the recent advances of ZIFs-based materials are critically surveyed from the perspective of synthesis, morphology, structure and properties, and correlated with performance indicators of ZABs. Finally, the major challenges and future prospects of ZIFs associated with ZABs are discussed.

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“…Wang et al [23] investigated uranium(VI) adsorption behavior on cross-linked chitosan. Liu et al [24] prepared chitosan/ZIF-8 composite beads for the efficient removal of U(VI). Lupa et al [9] conducted a research on the adsorption of cesium and strontium ions by 1-ethyl-3-methyl imidazolium chloride impregnated chitosan.…”

Section: Introductionmentioning

confidence: 99%

Box–Behnken design for removal of uranium(VI) from aqueous solution using poly(ethylene glycol) based dicationic ionic liquid impregnated chitosan

İnan¹,

Mumcu²,

Bozkurt³

2020

Turk J Chem

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Poly(ethylene glycol) bis(methylimidazolium) di[bis(trifluoromethylsulfonyl)imide] was synthesized as an ionic liquid and impregnated onto chitosan. The removal of uranium(VI) ions from aqueous solution was investigated with batch sorption tests using ionic liquid impregnated chitosan. Response surface methodology based on 3 level Box-Behnken design was applied to analyze the effect of initial pH (4-6), initial concentration (20-60 mg L −1) , contact time (15-105 min), and temperature (30-50°C) on the uptake capacity of uranium(VI). Main effect of initial concentration, quadratic effect of contact time, and dual effect of initial pH and contact time were found statistically significant based on analysis of variance (ANOVA). Probability F-value (F = 1.49 ×10 −6) and correlation coefficient (R 2 = 0.96) point out that the proposed model is compatible with experimental data. The maximum uptake capacity of uranium(VI) was found as 28.48 mg g −1 at initial pH 4, initial concentration 60 mg L −1 , contact time of 70 min, and a temperature of 50°C. Sorption kinetics followed a pseudo-second-order model and Freundlich model was obtained to fit the sorption data. The presence of competing ions slightly reduced uranium(VI) sorption and the selectivity order can be given as UO 2+ 2 >Zn 2+ >Ni 2+ .

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In situ Preparation of Chitosan/ZIF-8 Composite Beads for Highly Efficient Removal of U(VI)

Cited by 60 publications

References 52 publications

Adsorption of REEs from Aqueous Solution by EDTA-Chitosan Modified with Zeolite Imidazole Framework (ZIF-8)

Adsorption of REEs from Aqueous Solution by EDTA-Chitosan Modified with Zeolite Imidazole Framework (ZIF-8)

Advances in Zeolite Imidazolate Frameworks (ZIFs) Derived Bifunctional Oxygen Electrocatalysts and Their Application in Zinc–Air Batteries

Box–Behnken design for removal of uranium(VI) from aqueous solution using poly(ethylene glycol) based dicationic ionic liquid impregnated chitosan

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