海水
自愈水凝胶
铀
萃取(化学)
兴奋剂
化学
核化学
化学工程
材料科学
色谱法
高分子化学
工程类
冶金
光电子学
地质学
海洋学
作者
Jiahui Zhu,Linan Zhao,Dalei Song,Jing Yu,Qi Liu,Jingyuan Liu,Rongrong Chen,Gaohui Sun,Jun Wang
出处
期刊:Desalination
[Elsevier]
日期:2022-10-01
卷期号:540: 115993-115993
被引量:18
标识
DOI:10.1016/j.desal.2022.115993
摘要
Uranium extraction from seawater provides the new idea for the development of uranium resources. However, the concentration of uranium in seawater is extremely low (∼3.3 μg/L). Meanwhile, there are a large number of competing ions and microorganisms in the seawater. It is a huge challenge to extract uranium from seawater. In this paper, a double network hydrogels material with effective antifouling ability was prepared for highly efficient uranium sorption. First, poly(hexamethylene biguanide) hydrochloride (PHMB) modified graphene oxide(GO) was prepared (PHMB-GO), and then PHMB-GO was doped into the double network hydrogels structure formed by acrylamide and gelatin in order to obtain (GO-PHMB) 0.4 @Gelatin-PAM, which showed the maximum uranium adsorption capacity reached 625.00 mg∙g −1 . More importantly, it exhibited excellent selectivity towards uranium(VI) in the presence of multiple coexisting metal ions in simulated seawater. The K d value for uranium is 1.73 × 10 4 mL∙g −1 , which is far more than other metal ions. The antibacterial and antialgae experiments prove that the adsorption material has a good inhibitory effect on Escherichia coli ( E. coli ), vibrio vulnificus ( V vulnificus ) and Staphylococcus aureus ( S. aureus ). Therefore, (GO-PHMB) 0.4 @Gelatin-PAM is an outstanding candidate for efficient uranium extraction from seawater. • Antifouling double network hydrogels doped with polyguanidine-modified GO into Gelatin-PAM were successfully prepared. • The maximum theoretical adsorption capacity of (GO-PHMB) 0.4 @Gelatin-PAM DN hydrogels for uranium was 625.00 mg∙g −1 . • The (GO-PHMB) 0.4 @Gelatin-PAM DN hydrogels material had excellent antibacterial and anti-algal properties.
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