Efficient and rapid capture of uranium(Ⅵ) in wastewater via multiamine modified β-cyclodextrin porous polymer

作     者：Xing Zhong Yubin Tan Siyuan Wu Caixia Hu Kai Guo Yongchuan Wu Neng Yu Mingyang Ma Ying Dai Xing Zhong;Yubin Tan;Siyuan Wu;Caixia Hu;Kai Guo;Yongchuan Wu;Neng Yu;Mingyang Ma;Ying Dai

作者机构：School of Chemistry and Materials ScienceEast China University of TechnologyNanchang 330013China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2024年第68卷第4期

页      面：144-155页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 0817[工学-化学工程与技术] 08[工学] 

基　　金：National Natural Science Foundation of China(21603064,52102214) Natural Science Foundation of Jiangxi Province(20202BABL203026,20212BAB203001,20202BABL214016) College Student Innovation and Enterprise Programme of Jiangxi Province(S202310405010)provided funding for this study 

主　　题：Adsorption Waste water Pollution Uranium(VI) b-Cyclodextrin 

摘      要：It is quite important to ensure the safety and sustainable development of nuclear energy for the treatment of radioactive wastewater. To treat radioactive wastewater efficiently and rapidly, two multi-amine β-cyclodextrin polymers(diethylenetriamine β-cyclodextrin polymer(DETA-TFCDP) and triethylenetetramine β-cyclodextrin polymer(TETA-TFCDP)) were prepared and applied to capture uranium. Results exhibited that DETA-TFCDP and TETA-TFCDP displayed the advantages of high adsorption amounts(612.2and 628.2 mg·g-1, respectively) and rapid adsorption rates, which can reach(88 ± 1)% of their equilibrium adsorption amounts in 10 min. Moreover, the adsorbent processes of DETA-TFCDP and TETATFCDP on uranium(Ⅵ) followed the Langmuir model and pseudo-second-order model, stating they were mainly chemisorption and self-endothermic. Besides, TETA-TFCDP also showed excellent selectivity in the presence of seven competing cations and could be effectively reused five times via Na2CO3as the desorption reagent. Meanwhile, X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy illustrated that the enriched multi-amine groups and oxygen-containing functional groups on the surface of TETA-TFCDP were the main active sites for capturing uranium(Ⅵ). Hence, multi-amine β-cyclodextrin polymers are a highly efficient, rapid, and promising adsorbent for capturing uranium(Ⅵ)from radioactive wastewater.