Abstract
A novel material called m-carboxyphenyl azo calix[4]arene amine oxime derivatives (M-CCAOD) was synthesized by diazotization-coupling reaction and substitution reaction. Then the composite consisting of Fe3O4 and M-CCAOD was prepared through a facile self-assembly method. The as-synthesized Fe3O4/M-CCAOD composite was used to remove U(VI) from aqueous solutions under different conditions. The calculated data indicate that the adsorption process of uranium by Fe3O4/M-CCAOD is an exothermic spontaneous process, which well fits with the pseudo-second-order and Freundlich model. More significantly, the composite showed high selectivity for uranium and excellent reusability, demonstrating that Fe3O4/M-CCAOD may be a potential uranium adsorbent material.
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