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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Funding
This work was financially supported by the National Natural Science Foundation of China (21906017, 21866004, 21866003), the Science and Technology Support Program of Jiangxi Province (Grant No. 2018ACB21007), the Jiangxi Program of Academic and Technical Leaders of Major Disciplines (Grant No. 20182BCB22011), and the Jiangxi Provincial Natural Science Foundation (Grant Nos. 20202BABL213026, and 20202BABL203016).
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Youqun Wang, Xiaohong Cao, and Yunhai Liu have contributed to the main conceptual idea, study design, and full article writing, respectively. Yinghui Xie, Zhiyang Zheng, and Dejun Zeng have performed the experiments and analyzed the entire data. Ying Dai, Zhibin Zhang, and Rong Zou have conducted the characterization analysis of the adsorbents.
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Wang, Y., Xie, Y., Zheng, Z. et al. Surfactant-assisted adsorption of uranyl ions in aqueous solution on TiO2/polythiophene nanocomposite. Environ Sci Pollut Res 28, 37182–37194 (2021). https://doi.org/10.1007/s11356-021-12587-5
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DOI: https://doi.org/10.1007/s11356-021-12587-5