LAUSR

Abstract Environmental radionuclides’ contaminations have attracted widespread concerns owing to their austere hazardousness in physicochemical and accumulative bio-toxicities. Herein, magnetic carboxymethyl-β-cyclodextrin coated iron oxides nanoparticles (CM-CD-MNPs) were successfully fabricated using the chemical co-precipitation approach. The removal performances of uranium onto CM-CD-MNPs under various environmental conditions were investigated by macroscopical experiments and photoelectron spectroscopy. The reaction kinetic reactions and adsorption isotherms of uranium onto CM-CD-MNPs could be satisfactorily simulated using pseudo-second-order kinetic model and Langmuir model, respectively. The maximum adsorption capacity of U(VI) onto the CM-CD-MNPs was calculated to be nearly 5.75 × 10−4 mol/g, which was higher than many nanomaterials reported in literatures. The interactive mechanism of U(VI) onto CM-CD-MNPs composites was primarily commanded through surface complexation, chemical co-precipitation along with electrostatic attraction. The CM-CD-MNPs composites can be recycled and regenerated with acceptable reusability and possessed significant application potentials in the immobilization of U(VI) from nuclear fuel partition or nuclear waste management.