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Niu CP, Zhang CR, Cui WR, Yi SM, Liang RP, Qiu JD. A conveniently synthesized redox-active fluorescent covalent organic framework for selective detection and adsorption of uranium. JOURNAL OF HAZARDOUS MATERIALS 2022; 425:127951. [PMID: 34894515 DOI: 10.1016/j.jhazmat.2021.127951] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 11/19/2021] [Accepted: 11/27/2021] [Indexed: 06/14/2023]
Abstract
Uranium is a key element in the nuclear industry and also a global environmental contaminant with combined highly toxic and radioactive. Currently, the materials based on post-modification of amidoxime have been developed for uranium detection and adsorption. However, the affinity of amidoxime group for vanadium is stronger than that of uranium, which is the main challenge hindering the practical application of amidoxime-based adsorbents. Herein, we synthesized a fluorescent covalent organic framework (TFPPy-BDOH) through integrating biphenyl diamine and pyrene unit into the π-conjugated framework. TFPPy-BDOH has an excellent selectivity to uranium due to the synergistic effect of nitrogen atom in the imine bond and hydroxyl groups in conjugated framework. It can achieve ultra-fast fluorescence response time (2 s) and ultra-low detection limit (8.8 nM), which may be attributed to its intrinsic regular porous channel structures and excellent hydrophilicity. More excitingly, TFPPy-BDOH can chemically reduce soluble U (VI) to insoluble U (IV), and release the binding site to adsorb additional U (VI), achieving high adsorption capacity of 982.6 ± 49.1 mg g-1. Therefore, TFPPy-BDOH can overcome the challenges faced by current amidoxime-based adsorbents, making it as a potential adsorbent in practical applications.
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Affiliation(s)
- Cheng-Peng Niu
- College of Chemistry, Nanchang University, Nanchang 330031, China
| | - Cheng-Rong Zhang
- College of Chemistry, Nanchang University, Nanchang 330031, China
| | - Wei-Rong Cui
- College of Chemistry, Nanchang University, Nanchang 330031, China
| | - Shun-Mo Yi
- College of Chemistry, Nanchang University, Nanchang 330031, China
| | - Ru-Ping Liang
- College of Chemistry, Nanchang University, Nanchang 330031, China.
| | - Jian-Ding Qiu
- College of Chemistry, Nanchang University, Nanchang 330031, China; Engineering Technology Research Center for Environmental Protection Materials and Equipment of Jiangxi Province, Pingxiang University, Pingxiang 337055, China.
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Wang YQ, Wang H, Feng Y, Zhang ZB, Cao XH, Liu YH. Effect of Zr(IV) to phosphorus ratio on U(VI) adsorption by diethylenetriamine-pentamethylene phosphate Zr(IV) hybrids. RADIOCHIM ACTA 2021. [DOI: 10.1515/ract-2021-1052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Abstract
In this work, diethylenetriamine pentamethylenephosphonic acid (DTPMP) was ultilized into preparing of Zr(IV) organophosphates hybrids (Zr-DTPMP-x, x was the molar ratio of Zr(IV)/DTPMP in the synthetic process, x = 0.5, 1, 2, and 3) using a hydrothermal method. The physical and chemical properties of Zr-DTPMP-x were characterized by SEM&EDS, FT-IR, XRD, Zeta potential, XPS, TGA and contact angle analysis. Moreover, the adsorptive performances of Zr-DTPMP-x for U(VI) were investigated. The adsorption results showed that the optimum molar ratio of Zr(IV) to phosphine, pH, equilibrium time, and dosage was 0.5, 4.0, 180 min, and 10 mg, respectively. Besides, the adsorption of U(VI) was in accordance with the pseudo-second-order kinetic model and Sips isothermal model. Moreover, the adsorption capacity determined by Sips isothermal model was 181.34 mg g−1 for Zr-DTPMP-0.5. Furthermore, the adsorptive selectivity of Zr-DTPMP-0.5 for U(VI) was superior than the others. Zr-DTPMP-0.5 may be a powerful candidate for diminishing the contamination of U(VI).
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Affiliation(s)
- You-qun Wang
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology , Nanchang , Jiangxi , 330013 , China
- Engineering Research Center of Nuclear Technology Application (East China University of Technology), Ministry of Education , Nanchang , Jiangxi , 330013 , China
| | - Huan Wang
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology , Nanchang , Jiangxi , 330013 , China
- Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China University of Technology , Nanchang , Jiangxi , 330013 , China
| | - Yue Feng
- Department of Architectural Design , Nuclear Power Institute of China , Chengdu , Sichuan , 610000 , China
| | - Zhi-bin Zhang
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology , Nanchang , Jiangxi , 330013 , China
- Engineering Research Center of Nuclear Technology Application (East China University of Technology), Ministry of Education , Nanchang , Jiangxi , 330013 , China
- Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China University of Technology , Nanchang , Jiangxi , 330013 , China
| | - Xiao-hong Cao
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology , Nanchang , Jiangxi , 330013 , China
- Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China University of Technology , Nanchang , Jiangxi , 330013 , China
| | - Yun-hai Liu
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology , Nanchang , Jiangxi , 330013 , China
- Engineering Research Center of Nuclear Technology Application (East China University of Technology), Ministry of Education , Nanchang , Jiangxi , 330013 , China
- Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China University of Technology , Nanchang , Jiangxi , 330013 , China
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