Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4763313 | Chemical Engineering Journal | 2017 | 19 Pages |
Abstract
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 EDS2â anions in Co-SLUG-35 can be completely replaced by U(VI) ions in an anionic manner, leading to an adsorption capability of 118Â mg/g from alkaline U(VI) solution and excellent extraction efficiency of 1.05Â mg/g from 1Â L actual seawater in the concentration of 5.35Â 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 CrO42â and Clâ ions is also observed in Co-SLUG-35, suggesting its superior potential in extraction of uranium from seawater.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Jian Qiang Li, Le Le Gong, Xue Feng Feng, Le Zhang, Hui Qiong Wu, Chang Sheng Yan, Yang Yang Xiong, Heng Ya Gao, Feng Luo,