Highly efficient extraction of uranium from aqueous solution using imidazole functionalized core–shell sunflower-like superparamagnetic polymer microspheres: understanding adsorption and binding mechanisms

Yuan, Dingzhong; Zhao, Jizhou; Zhang, Qinghua; Lu, Pei; Wang, Yun; He, Yan; Liu, Zhongfan; Liu, Yan; Zhao, Xiaohong; Meng, Chao

doi:10.1039/d2ta02669d

Cited by 39 publications

(8 citation statements)

References 52 publications

(60 reference statements)

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“…3c). Meanwhile, the peaks at 400.2 and 398.3 eV in the N 1s spectrum were assigned to CN and C–N bonds 44 (Fig. 3d).…”

Section: Resultsmentioning

confidence: 99%

Magnetic-responsive solid acid catalysts for esterification

Xue,

Jiang,

Zheng

2023

RSC Adv.

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“…3c). Meanwhile, the peaks at 400.2 and 398.3 eV in the N 1s spectrum were assigned to CN and C–N bonds 44 (Fig. 3d).…”

Section: Resultsmentioning

confidence: 99%

Magnetic-responsive solid acid catalysts for esterification

Xue,

Jiang,

Zheng

2023

RSC Adv.

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“…The full-survey spectrum of the Fe 3 O 4 @SiO 2 and Fe 3 O 4 @SiO 2 @N(CH 3 ) 3 + are presented in Figure 3 , and there are significant peaks at 532.05 eV, 152.19 eV, and 102.54 eV corresponding to O 1 s, Si 2 s, and Si 2 p, respectively [ 27 , 28 ]. Moreover, the high-resolution spectra of Si 2 p and N 1 s are shown in Figure 2 b,c.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Application of Ion-Exchange Magnetic Microspheres for Deep Removal of Trace Acetic Acid from DMAC Waste Liquid

Jin

Zhang

et al. 2023

Nanomaterials

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In order to develop a deep method for removing trace acetic acid from industrial solvents, a type of quaternary ammonium-salt-modified magnetic microspheres was developed as a potential nanoadsorbent for low-concentration acetic-acid-enhanced removal from DMAC aqueous solution. The ion-exchange magnetic microspheres (Fe3O4@SiO2@N(CH3)3+) have been prepared by a two-step sol-gel method with N-trimethoxysilylpropyl-N, N, N-trimethylammonium chloride as functional monomer, tetraethyl orthosilicate as a cross-linking agent, Fe3O4@SiO2 as a matrix. The nanocomposite is characterized by SEM, FI-IR, XRD, VSM, and XPS. Moreover, the optimization of adsorption experiments shows that the maximum adsorption capacity of nanoadsorbent is 7.25 mg/g at a concentration = 30 mg/L, adsorbent dosage = 10 mg, V = 10 mL, and room temperature. Furthermore, the saturated Fe3O4@SiO2@N(CH3)3+ achieved an efficient regeneration using a simple desorption method and demonstrated a good regeneration performance after five adsorption/desorption cycles. In addition, Fe3O4@SiO2@N(CH3)3+ was used to remove acetic acid in DMAC waste liquid; the adsorption effect is consistent with that of a nanoadsorbent of acetic acid in an aqueous solution. These results indicate that Fe3O4@SiO2@N(CH3)3+ can efficiently treat acetic acid that is difficult to remove from DMAC waste liquid.

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“…Over the years, some of effective materials for uranium adsorption have been reported. Such as, graphene oxide‐based materials, [ 1 ] metal organ framework (MOF), [ 5 ] covalent organic framework (COF), [ 5 ] fibers, [ 5 ] poly (divinylyl‐vinylphosphonic acid) (P(DVB‐VPA)), [ 6 ] poly ( N , N ‐methylene bis(2‐propenamide)‐vinyl imidazole) (Fe 3 O 4 /P(MB‐VIM)), [ 7 ] Fe 3 O 4 /poly (diallylamine‐di(methacryloxyethyl)phosphate) (Fe 3 O 4 /P(DMAA‐DMP)), [ 8 ] AO‐Fe 3 O 4 /P (glycidyl methacrylate‐acrylic acid‐methyl methacrylate) (AO‐Fe 3 O 4 /P(GMA‐AA‐MMA)), [ 9 ] Fe 3 O 4 @SiO 2 /poly (trimethylolpropane trimethacrylate – vinylphosphonic acid) (Fe 3 O 4 @SiO 2 /P (TRIM‐VPA)), [ 10 ] etc. Nevertheless, because of the extremely low concentration of uranium and multiple interfering metal ions and microbial species in seawater, it is necessary to develop new highly selective and efficient adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Zwitterion Functionalized Graphene Oxide/Polyacrylamide/Polyacrylic Acid Hydrogels with Photothermal Conversion and Antibacterial Properties for Highly Efficient Uranium Extraction from Seawater

Sun

Qin

et al. 2023

Adv Funct Materials

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In this study, graphene oxide (GO) and polyacrylamide/polyacrylic acid (PAM/PAA) are used to prepare hydrogels with photothermal conversion properties for highly efficient uranium extraction from seawater. Zwitterionic 2‐methacryloyloxy ethyl phosphorylcholine (MPC) is introduced in the PAM/PAA/GO hydrogel to obtain PAM/PAA/GO/MPC (PAGM), exhibiting good antibacterial properties. PAGM demonstrates efficient and specific adsorption of uranium (VI) (U(VI)). Under light conditions, the adsorption capacity of PAGM reaches 196.12 mg g−1 (pH = 8, t = 600 min, C0 = 99.8 mg L−1, m/v = 0.5 g L−1). The adsorption capacity is only 160.29 mg g−1 under dark conditions (pH = 8, t = 600 min, C0 = 99.8 mg L−1, m/v = 0.5 g L−1). The adsorption capacity of light is 22.5% higher than that of dark. The adsorption process is fitted using the Langmuir and pseudo‐second‐order models. Furthermore, PAGM exhibits good repeatability and stability after five adsorption–desorption cycles. PAGM exhibits a U(VI) adsorption capacity of 6.1 mg g−1 after storage for one month in natural seawater. The X‐ray photoelectron spectroscopy (XPS) results demonstrate that the coordination of the amino, carboxyl, and hydroxyl groups with U(VI) is the primary mechanism of U(VI) adsorption. The mechanism is confirmed through detailed density functional theory calculations. PAGM demonstrates durability, high efficiency, photothermal conversion properties, and antibacterial properties. Thus, it is a promising candidate for uranium extraction from seawater.

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Highly efficient extraction of uranium from aqueous solution using imidazole functionalized core–shell sunflower-like superparamagnetic polymer microspheres: understanding adsorption and binding mechanisms

Abstract: Recovery of uranium from aqueous solutions using core-shell superparamagnetic polymer nanomaterials as efficient adsorbents might be helpful for environmental protection, due to their excellent structure stability, high concentration of accessible...

Cited by 39 publications

References 52 publications

Magnetic-responsive solid acid catalysts for esterification

Magnetic-responsive solid acid catalysts for esterification

Synthesis and Application of Ion-Exchange Magnetic Microspheres for Deep Removal of Trace Acetic Acid from DMAC Waste Liquid

Zwitterion Functionalized Graphene Oxide/Polyacrylamide/Polyacrylic Acid Hydrogels with Photothermal Conversion and Antibacterial Properties for Highly Efficient Uranium Extraction from Seawater

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