海水
化学
萃取(化学)
吸附
离子交换
铀
阳离子聚合
水溶液中的金属离子
无机化学
人工海水
离子
金属
色谱法
有机化学
材料科学
地质学
冶金
海洋学
作者
Jian Qiang Li,Le Le Gong,Xue Feng,Le Zhang,Hui Wu,Chang Yan,Xiong Yang,Heng Gao,Feng Luo
标识
DOI:10.1016/j.cej.2017.01.046
摘要
Directly extracting uranium from alkaline solution and seawater through an effective and economical method is still a challenging task. In this work, we for the first time propose a method of anionic exchange, based on a cationic MOF (metal-organic framework) adsorbent, namely Co-SLUG-35, to directly extract U(VI) from alkaline solution and seawater (South China Sea). The U(VI) adsorption experiments indicates that the EDS2− anions in Co-SLUG-35 can be completely replaced by U(VI) ions in an anionic manner, leading to an adsorption capability of 118 mg/g from alkaline U(VI) solution and excellent extraction efficiency of 1.05 mg/g from 1 L actual seawater in the concentration of 5.35 ppb. Most importantly, unlike other MOFs where degassing is primarily needed, however the use of present MOF need not any pretreatment. Moreover, ultrahigh selectivity towards U(VI) ions even over CrO42− and Cl− ions is also observed in Co-SLUG-35, suggesting its superior potential in extraction of uranium from seawater.
科研通智能强力驱动
Strongly Powered by AbleSci AI