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Liu YL, Zhang C, Guo L, Zeng Q, Wang R, Chen H, Zhang Q, Zeng Q. Synergistically adsorbing and reducing Uranium from water by a novel nano zero-valent copper/MXene 0D/2D nanocomposite. WATER RESEARCH 2023; 245:120666. [PMID: 37776588 DOI: 10.1016/j.watres.2023.120666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 09/16/2023] [Accepted: 09/23/2023] [Indexed: 10/02/2023]
Abstract
Proper disposal of uranium-containing waste is of utmost importance for safeguarding the environment and human health. In this study, we proposed a novel zero-dimensional (0D)/two-dimensional (2D) nanocomposite material, nZVC/Ti3C2, composed of nano zero-valent copper (nZVC) nanoparticles loaded onto Ti3C2 MXene nanoflakes, which was prepared using a simple in situ chemical reduction method. The uniform dispersion of 0D nZVC nanoparticles, with a size of approximately 5 nm, onto the 2D ultrathin Ti3C2 MXene effectively prevented agglomeration and corrosion of nZVC. This unique configuration provided numerous adsorption sites for UO22+and facilitated a fascinating charge channel for reducing adsorbed UO22+ into low-mobilized UO2 by nZVC. Under the synergistic effect of Ti3C2 MXene and nZVC, remarkable efficiency and selectivity of nZVC/Ti3C2 for U (VI) removal were demonstrated, which exhibited an exceptional adsorption capacity of up to 360 mg/g, coupled with a high removal efficiency of 97.5 % and rapid kinetics. Importantly, the presence of humic acid did not significantly affect the U (VI) removal efficiency of the composite because of the reduction effect of nZVC. The underlying mechanism of U (VI) removal was elucidated, revealing the involvement of reductive immobilization in the form of UO2 (as high as 73.6 %), inner-sphere surface complexation, and hydrolytic precipitation. This mechanism was dependent on the availability of active nZVC and the solution's pH. These findings highlight the potential of nZVC/Ti3C2 composites as efficient decontaminants for radioactive wastewater, thus contributing to advancements in environmental remediation endeavors.
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Affiliation(s)
- Yi-Lin Liu
- School of Mechanical Engineering, & School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China
| | - Chao Zhang
- School of Mechanical Engineering, & School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China
| | - Lulin Guo
- School of Mechanical Engineering, & School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China
| | - Qingming Zeng
- School of Mechanical Engineering, & School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China
| | - Rongzhong Wang
- School of Mechanical Engineering, & School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China
| | - Haodong Chen
- School of Mechanical Engineering, & School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China
| | - Qingyan Zhang
- School of Mechanical Engineering, & School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China
| | - Qingyi Zeng
- School of Mechanical Engineering, & School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China.
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Tiwari AN, Tapadia K, Thakur C, Sharma A. A sustainable approach to Gilloy-shoot extract-mediated synthesis of magnetite nanoparticles: isotherm and kinetic study of U(VI) removal. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08441-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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