Synthesis of rod-like metal-organic framework (MOF-5) nanomaterial for efficient removal of U(VI): batch experiments and spectroscopy study

Yihan Wu; Hongwei Pang; Wen Yao; Xiangxue Wang; Shujun Yu; Zhimin Yu; Xiangke Wang

doi:10.1016/j.scib.2018.05.021

Synthesis of rod-like metal-organic framework (MOF-5) nanomaterial for efficient removal of U(VI): batch experiments and spectroscopy study

Sci Bull (Beijing). 2018 Jul 15;63(13):831-839. doi: 10.1016/j.scib.2018.05.021. Epub 2018 May 25.

Authors

Yihan Wu¹, Hongwei Pang¹, Wen Yao¹, Xiangxue Wang², Shujun Yu³, Zhimin Yu⁴, Xiangke Wang⁵

Affiliations

¹ College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
² College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China; Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China.
³ College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China. Electronic address: sjyu@ncepu.edu.cn.
⁴ Department of Biology and Environmental Engineering, Hefei University, Hefei 230000, China.
⁵ College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China; Department of Biology and Environmental Engineering, Hefei University, Hefei 230000, China; Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions and School for Radiological and Interdisciplinary Sciences, Soochow University, Suzhou 215123, China. Electronic address: xkwang@ncepu.edu.cn.

PMID: 36658962
DOI: 10.1016/j.scib.2018.05.021

Abstract

With the widespread application of radionuclide ²³⁵U(VI), it is inevitable that part of U(VI) is released into the natural environment. The potential toxicity and irreversibility impact on the natural environment has become one of the most forefront pollution problems in nuclear energy utilization. In this work, rod-like metal-organic framework (MOF-5) nanomaterial was synthesized by a solvothermal method and applied to efficiently adsorb U(VI) from aqueous solutions. The batch experimental results showed that the sorption of U(VI) on MOF-5 was strongly dependent on pH and independent of ionic strength, indicating that the dominant interaction mechanism was inner-sphere surface complexation and electrostatic interaction. The maximum sorption capacity of U(VI) on MOF-5 was 237.0 mg/g at pH 5.0 and T = 298 K, and the sorption equilibrium reached within 5 min. The thermodynamic parameters indicated that the removal of U(VI) on MOF-5 was a spontaneous and endothermic process. Additionally, the FT-IR and XPS analyses implied that the high sorption capacity of U(VI) on MOF-5 was mainly attributed to the abundant oxygen-containing functional groups (i.e., CO and CO). Such a facile preparation method and efficient removal performance highlighted the application of MOF-5 as a candidate for rapid and efficient radionuclide contamination's elimination in practical applications.

Keywords: Interaction mechanism; MOF-5; Sorption; Uranium; XPS analysis.