U(VI) removal on polymer adsorbents: Recent development and future challenges

Critical Reviews in Environmental Science and Technology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 23

Published: Sept. 10, 2024

Language: Английский

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Selective capture of uranium by p-block bismuth-based metal–organic framework

Desalination, Journal Year: 2024, Volume and Issue: 576, P. 117360 - 117360

Published: Jan. 22, 2024

Language: Английский

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A sodium alginate gel bead adsorbent doping with amidoxime-modified hydroxyapatite for the efficient adsorption of uranium

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 266, P. 131112 - 131112

Published: March 26, 2024

Language: Английский

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A NiCo2O4 nanowire arrays decorated carbon felt cathode for synergistic treatment of complex uranium-organic wastewater in a self-driven solar coupling system

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132257 - 132257

Published: Feb. 1, 2025

Language: Английский

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β‐Ketoenamine and Benzoxazole‐Linked Covalent Organic Frameworks Tailored with Phosphorylation for Efficient Uranium Removal from Contaminated Water Systems

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(14)

Published: Dec. 22, 2023

Abstract The complexity of nuclear wastewater treatment motivates the design and synthesis highly selective stable uranium adsorbents to provide environmental remediation. Herein, a post‐synthetic modification method is adopted synthesize two β‐ketoenamine benzoxazole‐linked COFs decorated with abundant phosphonic groups for removal, which overcome disadvantage amidoxime stronger affinity vanadium than uranium. U‐uptake capacity β‐ketoenamine‐based TpPa‐2OH‐PHos reaches 410.9 mg g −1 (pH 5, C 0 = 100 L m/V 1/10 ). Notably, TpDBD‐PHos 633.3 at same conditions. More synergistic effect between benzoxazole rings may be responsible good adsorption performance TpDBD‐PHos. Moreover, exhibits satisfactory removal rate 87.71% in actual rainwater samples. X‐ray pHotoelectron spectroscopy (XPS) analysis suggests that strong interaction U(VI) oxygen/nitrogen atoms frameworks plays vital role TpDBD‐PHos, agrees well results density functional theory (DFT) calculations. chemostability excellent selectivity demonstrate an outstanding candidate from contaminated water systems.

Language: Английский

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A novel phosphorylated MXene composite for enhanced selective adsorption of uranium

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(3), P. 112518 - 112518

Published: March 15, 2024

Language: Английский

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Efficient Separation of Uranium(VI) by CaCO₃-Doped Chitosan with PO₄^3– Modification: Adsorption Behaviors and Mechanism Study

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(8), P. 4885 - 4895

Published: April 16, 2024

The application of chitosan-based materials for the separation uranium from wastewater was limited due to lack active sites. In this work, a composite (CaCO3@aCS/PA) effectively created by modifying chitosan with CaCO3 and phytic acid enhance adsorption performance materials. CaCO3@aCS/PA showed no significant changes Ca2+ detected in solution after stirring 10 h pH > 3, indicating good stability CaCO3@aCS/PA, which beneficial use adsorption. Moreover, capacity percentage reached 842.0 mg/g (298 K, = 4) 95.4% (C0 mg/L, equilibrium time significantly shortened, that modification enhanced ability uranium, related synergistic effect various sites (CO32–, PO43–, −OH, –NH2) on

Language: Английский

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Layer-stacked network hybrid aerogels for the adsorption of U(VI): Concentration screening, efficient recovery, and cycle mechanism

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 329, P. 125050 - 125050

Published: Sept. 9, 2023

Language: Английский

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In Situ Synthesis of Polyamidoxime Chains Inside the Negative‐Charged Confining Fields for Efficient Adsorption of Uranyl Ions

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 24, 2024

Abstract Polyamidoxime (PAO) and its derivatives are widely regarded as promising adsorbents for uranium extraction from seawater. However, their close‐packed structure encapsulates a large number of adsorption sites slows down the transfer rate uranyl ions, resulting in slight capacity. Herein, PAO polymer chains synthesized through molecular coordination template method carboxylate covalent organic framework (COF) to obtain PAO‐inserted COF adsorbent with open ion transport channels. After removing protons, COO − groups form situ electric fields inside 0.7 nm channel. This negatively‐charged reduces electrostatic repulsion among cations, thus realizing ultrahigh utilization (81.0%), far exceeding that classical amidoxime‐based (33.7%). 10 days contact natural seawater, COF‐PAO achieved an average capacity ≈12.26 mg‐U per g Bohai (China), satisfying standard (6.0 mg −1 ). work enumerates control spatial environment chains, provides guidance design subsequent high‐efficiency adsorbents.

Language: Английский

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New insights into the effects of Nd on low-temperature hydrothermal stability of deNO Cu/SAPO-34 catalysts: A comparative evaluation of the mechanism

Applied Surface Science, Journal Year: 2024, Volume and Issue: 669, P. 160538 - 160538

Published: June 15, 2024

Language: Английский

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