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NiFe₂O₄ nanoparticles (NiFe₂O₄ NPs) were synthesized and characterized using X-ray diffraction, transmission electronic microscopy (TEM), pH_pzc and Brunauer, Emmett, and Teller methods. Size of the nanostructures according to TEM was obtained around 12 nm. The prepared NiFe₂O₄ NPs was used as an adsorbent for the removal of anionic dyes of Sunset Yellow, Tartrazine, and Eriochrome Black T from aqueous solutions. It was found that removal percentage significantly depends on the level of initial solution pH. The adsorption of anionic dyes on to NiFe₂O₄ NPs was investigated from both equilibrium and kinetic point of view. Kinetic experiments were performed at three values of initial dyes concentration in the solution and the results of fitting to the experimental data by the non-linear methods represent that fractal-like pseudo-second-order model can describe the kinetics of adsorption. Among the …