Amidoxime-based adsorbents prepared by cografting acrylic acid with acrylonitrile onto HDPE fiber for the recovery of uranium from seawater
Amidoxime-based adsorbents prepared by cografting acrylic acid with acrylonitrile onto HDPE fiber for the recovery of uranium from seawater
复制标题
将丙烯酸与丙烯腈共接枝到 HDPE 纤维上制备的偕胺肟基吸附剂用于从海水中回收铀
DOI：
10.1007/s41365-017-0198-7
复制
发表时间：
2017
影响因子：
2.8
通讯作者：
Wu Guo-Zhong
中科院分区：
文献类型：
--
作者：
Xu Lu;Hu Jiang-Tao;Ma Hong-Juan;Ling Chang-Jian;Wang Mou-Hua;Shen Rong-Fang;Guo Xiao-Jing;Wang Yin-Ning;Li Jing-Ye;Wu Guo-Zhong
采用电子束预辐射接枝丙烯腈和丙烯酸到高密度聚乙烯纤维上，然后进行偕胺肟化反应，制备了偕胺肟基高分子吸附剂。通过模拟海水的过流实验和天然海水的海上实验，对铀的定量回收进行了研究。在模拟海水中接触42 d后，最大吸铀量为2.51 mg/g-ads，在天然海水中接触15 d后，最大吸铀量为0.13 mg/g-ads。在海洋试验中，铀的吸收率较低，这可能是由于吸附时间短以及海洋微生物和铁的污染。然而，相对于钒，对铀的高选择性可能有利于将铀酰离子收集到吸附剂上，并且从海水中回收铀具有经济可行性。
An amidoxime-based polymeric adsorbent was prepared by pre-irradiation grafting of acrylonitrile and acrylic acid onto high-density polyethylene fibers using electron beams, followed by amidoximation. Quantitative recovery of uranium was investigated by flow-through experiment using simulated seawater and marine test in natural seawater. The maximum amount of uranium uptake was 2.51 mg/g-ads after 42 days of contact with simulated seawater and 0.13 mg/g-ads for 15 days of contact with natural seawater. A lower uranium uptake in marine test can be attributed to the short adsorption time and the contamination of marine microorganisms and iron. However, the high selectivity toward uranium against vanadium may be beneficial to harvest uranyl ion onto adsorbents and the economic feasibility for recovery of uranium from seawater.