Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption
A CNT-modified composite (namely, NH2-PZS/CNT/Fe3O4) was prepared and used for the removal of U(VI) from aqueous solution. The composite was synthesized using Fe3O4 nanoparticles with polyphosphazene-based polymer coating on CNTs. Experiments were carried out to investigate the influence of pH, conc...
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sg-ntu-dr.10356-1505822021-06-07T04:45:23Z Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption Liu, Yan Zhao, Zhengping Yuan, Dingzhong Wang, Yun Dai, Ying Zhu, Yean Chew, Jia Wei School of Chemical and Biomedical Engineering Singapore Membrane Technology Centre Nanyang Environment and Water Research Institute Engineering::Chemical engineering Polyphosphazene Amino A CNT-modified composite (namely, NH2-PZS/CNT/Fe3O4) was prepared and used for the removal of U(VI) from aqueous solution. The composite was synthesized using Fe3O4 nanoparticles with polyphosphazene-based polymer coating on CNTs. Experiments were carried out to investigate the influence of pH, concentration, contact time and temperature on the U(VI) removal process. The maximum adsorption capacity was calculated as 250 mg/g by considering Langmuir isotherm model and the adsorption process was also explained with pseudo-second-order kinetics. Adsorption tests in the presence of competing ions exhibited high selectivity for U(VI). The thermodynamic parameters indicate that the process was spontaneous and endothermic. The interaction mechanism of U(VI) with NH2-PZS/CNT/Fe3O4 was systematically clarified by using X-ray photoelectron spectroscopy (XPS) and Fourier transformation infrared (FTIR). Overall, the prepared NH2-PZS/CNT/Fe3O4 composite, which displayed important advantages such as re-usability, high adsorption capacity and selectivity, is a good adsorbent candidate for the removal of U(VI) from wastewater. 2021-06-07T04:45:23Z 2021-06-07T04:45:23Z 2019 Journal Article Liu, Y., Zhao, Z., Yuan, D., Wang, Y., Dai, Y., Zhu, Y. & Chew, J. W. (2019). Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption. Applied Surface Science, 466, 893-902. https://dx.doi.org/10.1016/j.apsusc.2018.10.097 0169-4332 https://hdl.handle.net/10356/150582 10.1016/j.apsusc.2018.10.097 2-s2.0-85054914980 466 893 902 en Applied Surface Science © 2018 Elsevier B.V. All rights reserved. |
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Engineering::Chemical engineering Polyphosphazene Amino Liu, Yan Zhao, Zhengping Yuan, Dingzhong Wang, Yun Dai, Ying Zhu, Yean Chew, Jia Wei Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption |
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A CNT-modified composite (namely, NH2-PZS/CNT/Fe3O4) was prepared and used for the removal of U(VI) from aqueous solution. The composite was synthesized using Fe3O4 nanoparticles with polyphosphazene-based polymer coating on CNTs. Experiments were carried out to investigate the influence of pH, concentration, contact time and temperature on the U(VI) removal process. The maximum adsorption capacity was calculated as 250 mg/g by considering Langmuir isotherm model and the adsorption process was also explained with pseudo-second-order kinetics. Adsorption tests in the presence of competing ions exhibited high selectivity for U(VI). The thermodynamic parameters indicate that the process was spontaneous and endothermic. The interaction mechanism of U(VI) with NH2-PZS/CNT/Fe3O4 was systematically clarified by using X-ray photoelectron spectroscopy (XPS) and Fourier transformation infrared (FTIR). Overall, the prepared NH2-PZS/CNT/Fe3O4 composite, which displayed important advantages such as re-usability, high adsorption capacity and selectivity, is a good adsorbent candidate for the removal of U(VI) from wastewater. |
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School of Chemical and Biomedical Engineering |
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School of Chemical and Biomedical Engineering Liu, Yan Zhao, Zhengping Yuan, Dingzhong Wang, Yun Dai, Ying Zhu, Yean Chew, Jia Wei |
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Article |
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Liu, Yan Zhao, Zhengping Yuan, Dingzhong Wang, Yun Dai, Ying Zhu, Yean Chew, Jia Wei |
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Liu, Yan |
title |
Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption |
title_short |
Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption |
title_full |
Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption |
title_fullStr |
Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption |
title_full_unstemmed |
Introduction of amino groups into polyphosphazene framework supported on CNT and coated Fe3O4 nanoparticles for enhanced selective U(VI) adsorption |
title_sort |
introduction of amino groups into polyphosphazene framework supported on cnt and coated fe3o4 nanoparticles for enhanced selective u(vi) adsorption |
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2021 |
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https://hdl.handle.net/10356/150582 |
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1702431287304781824 |