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Surfactant-assisted adsorption of uranyl ions in aqueous solution on TiO2/polythiophene nanocomposite |
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| Authors: | Wang Youqun Xie Yinghui Zheng Zhiyang Zeng Dejun Dai Ying Zhang Zhibin Cao Xiaohong Zou Rong Liu Yunhai |
| Institution: | 1.State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, 330013, Jiangxi, China ;2.Engineering Research Center of Nuclear Technology Application, East China University of Technology, Nanchang, 330013, Jiangxi, China ;3.Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China University of Technology, Nanchang, 330013, Jiangxi, China ; |
| Abstract: | In this work, hexadecyltrimethylammonium-bromide (HTAB)-modified polythiophene (PTh)/TiO2 nanocomposite (HTAB/PTh/TiO2) was applied to remove uranyl ions (UO22+). FT-IR, XRD, ζ potential, TGA, SEM, and XPS were utilized to obtain the chemical and physical properties of HTAB/PTh/TiO2. The effects of HTAB content, preparation temperature, and adsorption conditions on UO22+ removal were investigated comprehensively. And the UO22+ adsorption process on HTAB/PTh/TiO2 was fitted to the Sips model with a saturated adsorption capacity of 234.74 mg/g, which was 6 times over TiO2. The results suggested that the surfactant of HTAB can significantly improve the adsorption ability of TiO2 for UO22+ ions. This work provides a strategy of surfactant modification for enhancing the separation and recovery ability of adsorbent toward UO22+ in the radioactive wastewater. |
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