An antibacterial and antifouling amidoxime-functionalized graphene oxide aerogel for selective uranium adsorption in Salt Lake water
An antibacterial and antifouling amidoxime-functionalized graphene oxide aerogel for selective uranium adsorption in Salt Lake water
复制标题
一种抗菌防污偕胺肟功能化氧化石墨烯气凝胶，用于盐湖水中选择性吸附铀
DOI：
10.1016/j.colsurfa.2022.129367
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发表时间：
2022-09-20
影响因子：
5.2
通讯作者：
Mo, Zunli
中科院分区：
文献类型：
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作者：
Liu, Nijuan;Liang, Hao;Mo, Zunli
铀在核能中发挥着重要作用，盐湖水中蕴藏着丰富的铀资源，可以进行勘探。但污染物、微生物和共存离子的存在，使从盐湖中选择性吸附铀变得非常具有挑战性。本文以氧化石墨烯（GO）、肟化二氨基顺丁烯二腈（DO）、氧化锌（ZnO）和壳聚糖（CS）为原料，制备了氧化石墨烯基气凝胶（CS-GO-DO/ZnO）吸附剂。静态吸附实验表明，CS-GO-DO/ZnO气凝胶对铀具有较高的吸附容量和选择性，在纯铀溶液中的最大吸附容量可达561.09 mg/g。最重要的是，合成的CS-GODO/ZnO气凝胶表现出优异的抗菌和除臭性能，即使在大量细菌和污染物存在的情况下，吸附能力仍能达到纯溶液的96%以上。最后将合成材料应用于天然盐湖水中，其对铀的吸附容量达到3.67 mg/g，表现出良好的上级吸附性能。因此，CS-GO-DO/ZnO气凝胶是一种很有潜力的铀提取吸附剂。
Uranium plays an important role in nuclear energy and the abundant amount of uranium could be explored in Salt Lake water. However, the existence of pollutants, microorganisms and coexisting ions make it very challenging to selectively adsorb uranium from Salt Lake. Herein, a graphene oxide-based aerogel (CS-GO-DO/ZnO) adsorbent was prepared by compounding graphene oxide (GO) with amidoximated diaminomaleonitrile (DO), ZnO particles and Chitosan (CS) to selectively adsorb uranium. Batch adsorption experiments revealed that the CS-GO-DO/ZnO aerogel showed high adsorption capacity and good selectivity for uranium and the maximum adsorption capacity can reach 561.09 mg/g in pure uranium solution. Most importantly, the synthesized CS-GODO/ZnO aerogel showed excellent antibacterial and antifouling performance, and the adsorption capacity can still reach more than 96 % of the pure solution even in the presence of abundant bacteria and pollutants. Finally, the synthesized material was applied in natural Salt Lake water and it presented superior uranium adsorption capacity (3.67 mg/g). Therefore, the CS-GO-DO/ZnO aerogel can be potentially used as a promising adsorbent for uranium extraction.