Phytic acid modified NH2-MIL-101 via Mannich reaction for highly efficient uranium (Ⅵ) extraction from seawater

Xin Su; Yudan Wang; Lijia Liu; Hongxing Dong

Results in Engineering (Dec 2023)

Phytic acid modified NH2-MIL-101 via Mannich reaction for highly efficient uranium (Ⅵ) extraction from seawater

Xin Su,
Yudan Wang,
Lijia Liu,
Hongxing Dong

Affiliations

Xin Su: Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
Yudan Wang: Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China; Corresponding author.
Lijia Liu: Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China; Yantai Research Institute of Harbin Engineering University, Yantai 264006, China; Corresponding author. Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
Hongxing Dong: Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China

Journal volume & issue: Vol. 20
p. 101399

Abstract

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An essential part of achieving sustainable uranium resource development was the search for a suitable adsorbent capable of efficiently capturing uranium (Ⅵ) from seawater. Here, a modified metal-organic framework (PA-MIL-101) was prepared by phosphorylation of NH2-MIL-101 with phytic acid (PA). PA-MIL-101 exhibited a specific surface area of 252 m2∙g−1 and proved exceptionally adept at extracting uranium (Ⅵ) from seawater. Batch experiments were conducted to examine how environmental conditions such as pH and natural seawater affect the uranium adsorption performance of the materials. The adsorption capacity of PA-MIL-101 exhibited a remarkable performance, showcasing a substantial 41.8% increase compared to NH2-MIL-101 (the adsorption capacity increased to 416.7 mg∙g−1 at pH = 7 in 100 mg∙L−1 U(Ⅵ) solution). Due to the fast adsorption kinetics, PA-MIL-101 achieves a saturation level of 72.1% within the first 5 min. The removal rate was further elevated to 88.48% in the more intricate natural seawater. The reusability of PA-MIL-101 was demonstrated through five recycling cycles. The porous material PA-MIL-101 has abundant P=O and P–OH active sites, which can strongly complex with uranium (Ⅵ). This feature makes PA-MIL-101 perform effective in natural seawater. Therefore, PA-MIL-101 is considered as a promising supersorbent for efficient removal of uranium (Ⅵ).

Published in Results in Engineering

ISSN: 2590-1230 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology
Website: https://www.journals.elsevier.com/results-in-engineering

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