DNA nano-pocket for ultra-selective uranyl extraction from seawater

被引：191
作者：
Yuan, Yihui [1 ]
Liu, Tingting [1 ]
Xiao, Juanxiu [1 ]
Yu, Qiuhan [1 ]
Feng, Lijuan [1 ]
Niu, Biye [1 ]
Feng, Shiwei [1 ]
Zhang, Jiacheng [1 ]
Wang, Ning [1 ]
机构：
[1] Hainan Univ, State Key Lab Marine Resource Utilizat South Chin, Haikou 570228, Hainan, Peoples R China
来源：
NATURE COMMUNICATIONS | 2020年 / 11卷 / 01期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
URANIUM EXTRACTION; RECOVERY; COMPLEXATION;
D O I：
10.1038/s41467-020-19419-z
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Extraction of uranium from seawater is critical for the sustainable development of nuclear energy. However, the currently available uranium adsorbents are hampered by co-existing metal ion interference. DNAzymes exhibit high selectivity to specific metal ions, yet there is no DNA-based adsorbent for extraction of soluble minerals from seawater. Herein, the uranyl-binding DNA strand from the DNAzyme is polymerized into DNA-based uranium extraction hydrogel (DNA-UEH) that exhibits a high uranium adsorption capacity of 6.06mgg(-1) with 18.95 times high selectivity for uranium against vanadium in natural seawater. The uranium is found to be bound by oxygen atoms from the phosphate groups and the carbonyl groups, which formed the specific nano-pocket that empowers DNA-UEH with high selectivity and high binding affinity. This study both provides an adsorbent for uranium extraction from seawater and broadens the application of DNA for being used in recovery of high-value soluble minerals from seawater. The extraction of metals from seawater is an area of great potential; especially for the extraction of uranium. Here, the authors report on the synthesis of a DNA based uranium adsorbent with high selectivity and demonstrate the potential for the DNA based extraction of high-value soluble minerals from seawater.
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页数：8
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