Method for preparing calixarene-modified magnetic nano-adsorbent and adsorbing low-concentration uranium with calixarene-modified magnetic nano-adsorbent

一种杯芳烃修饰的磁性纳米吸附剂制备及其吸附低浓度铀的方法

Abstract

本发明涉及吸附剂4‑磺酰杯[6]芳烃修饰的磁性纳米Fe3O4的制备及其吸附低浓度铀的方法。利用4‑磺酰杯[6]芳烃对磁性纳米Fe3O4的修饰,是通过磁性纳米Fe3O4与4‑磺酰杯[6]芳烃下沿的酚羟基形成Fe‑O键,使磁性纳米Fe3O4与4‑磺酰杯[6]芳烃完成接枝,从而达到修饰的目的。利用4‑磺酰杯[6]芳烃对磁性纳米Fe3O4进行修饰后,可以增加其亲水性,增大表面积,通过络合反应、静电结合等反应使其更好的与UO22+结合。本发明的吸附剂比磁性纳米Fe3O4吸附剂吸附率更高、吸附效果更好。
The invention relates to a method for preparing an adsorbent 4-sulfocalix[6]arene-modified magnetic nano Fe3O4 and adsorbing low-concentration uranium with the adsorbent. Modification of magnetic nano Fe3O4 with 4-sulfocalix[6]arene is realized as follows: Fe-O bonds are formed through magnetic nano Fe3O4 and phenolic hydroxyl groups on the lower edge of 4-sulfocalix[6]arene to promote grafting of magnetic nano Fe3O4 and 4-sulfocalix[6]arene, and the purpose of modification is achieved. After magnetic nano Fe3O4 is modified with 4-sulfocalix[6]arene, the hydrophilcity of magnetic nano Fe3O4 is increased, the surface area is increased, and magnetic nano Fe3O4 is can be better bonded with UO2<2+> through a complexing reaction, electrostatic bonding and other reactions. The adsorbent has higher adsorption rate and better adsorption effect than the magnetic nano Fe3O4 adsorbent.

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