Cuttlefish ink loaded polyamidoxime adsorbent with excellent photothermal conversion and antibacterial activity for highly efficient uranium capture from natural seawater.
Cuttlefish ink loaded polyamidoxime adsorbent with excellent photothermal conversion and antibacterial activity for highly efficient uranium capture from natural seawater.
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DOI：
10.2139/ssrn.4024750
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发表时间：
2022-03
影响因子：
13.6
通讯作者：
Hui Wang;Taohong Xu;Binhui Zheng;Meng Cao;Feng Gao;Guanbing Zhou;Chong Ma;Jia Dang;
中科院分区：
文献类型：
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作者：
Hui Wang;Taohong Xu;Binhui Zheng;Meng Cao;Feng Gao;Guanbing Zhou;Chong Ma;Jia Dang;
由于海洋中铀储量丰富，从海水中收集铀引起了人们的广泛兴趣。与从矿石中提取铀相比，从海水中收集铀是一种更环保的策略。偕胺肟（AO）官能团被认为是捕获铀最有效的螯合基团之一。在这项工作中，利用墨鱼墨的光热特性和抗菌活性，开发了一种墨鱼墨负载的聚酰胺肟（CI-PAO）膜吸附剂。在一次太阳光照下，CI-PAO膜在500 mL 8 ppm铀加标模拟海水中表现出高达488.76 mg-U/g-Ads的萃取能力，是PAO膜的1.24倍。 CI-PAO膜的吸附率提高了32.04%。此外，CI-PAO对复合海洋细菌的抑菌率约为75%，具有显着的抗菌活性，可有效防止吸附剂表面的功能位点被生物污垢块占据。在天然海水中浸泡 4 周后，光照射的 CI-PAO 具有 6.17 mg-U/g-Ads 的高铀吸收能力。因此，CI-PAO膜吸附剂可以被认为是海水提铀实际应用的潜在候选者。
Owing to the abundant uranium reserves in the oceans, the collection of uranium from seawater has aroused the widespread interest. Compared to the uranium extraction from ore, uranium collection from seawater is a more environmentally friendly strategy. The amidoxime (AO) functional group has been considered as one of the most efficient chelating groups for uranium capture. In this work, by drawing upon the photothermal character and antibacterial activity of cuttlefish ink, a cuttlefish ink loaded polyamidoxime (CI-PAO) membrane adsorbent is developed. Under one-sun illumination, the CI-PAO membrane shows a high extraction capacity of 488.76 mg-U/g-Ads in 500 mL 8 ppm uranium spiked simulated seawater, which is 1.24 times higher than PAO membrane. The adsorption rate of CI-PAO membrane is increased by 32.04%. Furthermore, exhibiting roughly 75% bacteriostatic rate in composite marine bacteria, the CI-PAO shows a dramatically antibacterial activity, which effectively prevents the functional sites on the adsorbent surface from being occupied by the biofouling blocks. After immersing in natural seawater for 4 weeks, light-irradiated CI-PAO gave high uranium uptake capacity of 6.17 mg-U/g-Ads. Hence, the CI-PAO membrane adsorbent can be considered as a potential candidate for the practical application for uranium extraction from seawater.