Efficient removal of uranium (VI) from aqueous solution by functionalized plate-like covalent organic frameworks

IF 1.5 3区化学 Q3 CHEMISTRY, ANALYTICAL

Journal of Radioanalytical and Nuclear Chemistry Pub Date : 2025-01-29 DOI:10.1007/s10967-024-09968-8

Jiahu Zhang, Dechun Liu, Jiyao Hu, Zhong Chen

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引用次数: 0

Abstract

A novel plate-like covalent organic framework (COF) adsorbent (AO-MA-ATA) was synthesized via a series of thermochemical methods using amidoxime-functionalized 2-aminoterephthalic acid (H₂ATA)-melamine (MA) and applied for the removal of radioactive uranium U(VI) under neutral aqueous conditions. The prepared materials were characterized using spectroscopic, X-ray, and microscopic imaging techniques, which confirmed the plate-like structure of the AO-MA-ATA COFs. Kinetic analysis indicated that U(VI) adsorption onto AO-MA-ATA followed a second-order model. The isothermal adsorption of U(VI) could be described by the Langmuir isotherm model, with a maximum adsorption capacity of 1111.1 mg g⁻¹ at 318 K and pH 7. Evaluation of the thermodynamic parameters showed that U(VI) adsorption by AO-MA-ATA was a spontaneous and exothermic process. The adsorption mechanism mainly involved chelation, rather than covalent bonding. Overall, the results presented herein indicate that AO-MA-ATA COFs can effectively remove U(VI) from aqueous solutions and are therefore promising candidates for treating uranium-containing wastewater.

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来源期刊

Journal of Radioanalytical and Nuclear Chemistry 化学-分析化学

CiteScore

2.80

自引率

18.80%

发文量

504

审稿时长

2.2 months

期刊介绍： An international periodical publishing original papers, letters, review papers and short communications on nuclear chemistry. The subjects covered include: Nuclear chemistry, Radiochemistry, Radiation chemistry, Radiobiological chemistry, Environmental radiochemistry, Production and control of radioisotopes and labelled compounds, Nuclear power plant chemistry, Nuclear fuel chemistry, Radioanalytical chemistry, Radiation detection and measurement, Nuclear instrumentation and automation, etc.