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In the present work, the CeO₂/CuFe₂O₄ nanofibers with the structure of CuFe₂O₄ as the core and CeO₂ nanoparticles as the outer layer were prepared. This novel nanostructure was characterized by X-ray diffraction analysis, Fourier transform infrared spectroscopy, and scanning electron microscopy (SEM). The sizes of CeO₂/CuFe₂O₄ nanofibers determined from the SEM images were 100 nm. The obtained nanocomposite was used to investigate adsorption of Pb(II), Ni(II), and V(V) ions from aqueous solutions. Contact time, pH, initial metal concentration, and temperature were optimized to improve the removal efficiency. The adsorption equilibrium and kinetic data were modeled with classical and recently developed models. Maximum adsorption capacity of Pb(II), Ni(II), and V(V) on CeO₂/CuFe₂O₄ nanofibers were 972.4, 686.1, and 798.6 mg g⁻¹, respectively. The results showed that the synthesized …