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首页> 外文期刊>RSC Advances >A novel ion-imprinted amidoxime-functionalized UHMWPE fiber based on radiation-induced crosslinking for selective adsorption of uranium
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A novel ion-imprinted amidoxime-functionalized UHMWPE fiber based on radiation-induced crosslinking for selective adsorption of uranium

机译：基于辐射诱导交联的新型离子印迹a胺肟官能化UHMWPE纤维对铀的选择性吸附

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摘要

A novel uranium-imprinted adsorbent (AO-Imp fiber) was prepared by radiation-induced crosslinking of amidoxime-functionalized ultra-high molecular weight polyethylene fiber (AO fiber). The porous structure was characterized by scanning electron microscopy (SEM) and positron annihilation lifetime (PAL) spectroscopy after ion imprinting. This ion-imprinted fiber exhibited enhanced adsorption selectivity for uranium in the form of both UO _(2) ~(2?) and [UO _(2) (CO _(3) ) _(3) ] ~(4?) in batch experiments. Compared with AO fiber, the adsorption capacity of the AO-Imp(250) fiber for uranium increased from 0.36 mg g ~(?1) to 1.00 mg g ~(?1) in simulated seawater and from 5.02 mg g ~(?1) to 12.03 mg g ~(?1) in simulated acid effluent, while its adsorption capacities for other co-existing metal ions were particularly low. This study provides an approach to prepare ion-imprinted adsorbents without introducing crosslinking reagents, which may be a promising method for uranium extraction.
机译：通过radiation胺肟官能化的超高分子量聚乙烯纤维（AO纤维）的辐射诱导交联，制备了一种新型的铀印迹吸附剂（AO-Imp纤维）。离子印迹后，通过扫描电子显微镜（SEM）和正电子an没寿命（PAL）光谱对多孔结构进行了表征。这种离子印迹纤维以UO _（2）〜（2？）和[UO _（2）（CO _（3））_（3）]〜（4？）的形式表现出对铀的增强的吸附选择性。在批量实验中。与AO纤维相比，AO-Imp（250）纤维对铀的吸附能力从模拟海水中的0.36 mg g〜（？1）增加到1.00 mg g〜（？1），从5.02 mg g〜（？1） ）在模拟酸流出物中达到12.03 mg g〜（？1），而其对其他共存金属离子的吸附能力特别低。这项研究提供了一种无需引入交联剂即可制备离子印迹吸附剂的方法，这可能是铀萃取的一种有前途的方法。

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