DNA nano-pocket for ultra-selective uranyl extraction from seawater.
DNA nano-pocket for ultra-selective uranyl extraction from seawater.
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DOI：
10.1038/s41467-020-19419-z
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发表时间：
2020-11-11
影响因子：
16.6
通讯作者：
Wang N
中科院分区：
文献类型：
--
作者：
Yuan Y;Liu T;Xiao J;Yu Q;Feng L;Niu B;Feng S;Zhang J;Wang N
从海水中提取铀对于核能的可持续发展至关重要。然而，目前可用的铀吸附剂受到共存金属离子干扰的阻碍。DNA酶对特定的金属离子具有很高的选择性，但目前还没有基于DNA的吸附剂用于从海水中提取可溶性矿物质。在此，将来自DNA酶的结合铀酰的DNA链聚合成DNA基铀提取水凝胶（DNA-UEH），其表现出6.06 mg g-1的高铀吸附容量，对天然海水中的铀相对于钒的选择性高18.95倍。发现铀被来自磷酸基团和羰基的氧原子结合，这形成了使DNA-UEH具有高选择性和高结合亲和力的特定纳米口袋。本研究为海水提铀提供了一种吸附剂，同时也拓宽了DNA在海水中提取高价值可溶性矿物的应用。从海水中提取金属是一个具有巨大潜力的领域，特别是在提取铀方面。在这里，作者报道了一种基于DNA的铀吸附剂的合成，具有高选择性，并展示了基于DNA的海水中提取高价值可溶性矿物的潜力。
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 6.06 mg g−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.