铀
气凝胶
吸附
海水
化学
废水
水溶液
核化学
环境化学
材料科学
环境科学
冶金
环境工程
有机化学
地质学
纳米技术
海洋学
作者
Yadong Pu,Taotao Qiang,Guoxiang Li,Xiaonan Ruan,Longfang Ren
标识
DOI:10.1016/j.ecoenv.2023.115053
摘要
The development of nuclear energy has led to the depletion of uranium resources and now presents the challenge of treating radioactive wastewater. Extracting uranium from seawater and nuclear wastewater has been identified as an effective strategy for addressing these issues. However, extracting uranium from nuclear wastewater and seawater is still extremely challenging. In this study, an amidoxime-modified feather keratin aerogel (FK-AO aerogel) was prepared using feather keratin for efficient uranium adsorption. The FK-AO aerogel showed an impressive adsorption capacity of 585.88 mg·g-1 in an 8 ppm uranium solution, with a calculated maximum adsorption capacity of 990.10 mg·g-1. Notably, the FK-AO aerogel demonstrated excellent selectivity for U(VI) in simulated seawater that contained coexisting heavy metal ions. In a uranium solution having a salinity of 35 g·L-1 and a concentration of 0.1-2 ppm, the FK-AO aerogel achieved a uranium removal rate of greater than 90 %, indicating its effectiveness in adsorbing uranium in environments having high salinity and low concentration. This suggests that FK-AO aerogel is an ideal adsorbent for extracting uranium from seawater and nuclear wastewater, and it is also expected that it could be used in industrial applications for extracting uranium from seawater.
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