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This study reports on synthesis of a new nanoadsorbent for efficient Cu (II) and Pb (II) ions removal from water samples. In this regard, magnetite nanoparticles have been modified with 2, 4-dinitrophenylhydrazine. The synthesized adsorbent has been fully characterized using scanning electron microscope, X-ray diffractometer, Fourier transform infrared spectrometer, and Brunauer, Emmett, and Teller measurements. The metal ions adsorption process has been thoroughly studied from both kinetic and equilibrium points of views. The adsorption isotherms were analyzed using five different isotherm models. It was found that the Sips isotherm showed better correlation with the experimental data than other isotherms, and the synthesized nanoadsorbent presents adsorption capacities for removal of Pb (II) and Cu (II) as high as 484.7 mg gÀ1 and 570.0 mg gÀ1, respectively. The adsorption kinetics was tested for the …