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 

机构地区：[1]School of Chemistry and Materials Science,East China University of Technology,Nanchang 330013,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第4期144-155,共12页中国化学工程学报（英文版）

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.

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.

关 键 词：Adsorption Waste water Pollution Uranium(VI) b-Cyclodextrin 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]