Lead is a substance commonly found in the environment and has been recognized as a toxic element for human health, arising from industrial wastewater, food, drinking water, soil, and paint sources. The toxicity of lead could result in irreversible health effects to the central nervous, hepatic, circulatory, cardiovascular, reproductive and renal systems. In this work, nickel zinc ferrite (Ni 0.5 Zn 0.5 Fe 2 O 4 ) nanoparticles was employed for removal of Lead (II) ions from real samples. Nickel zinc ferrite nanoparticles is a good candidate for the adsorption of the pollutant materials from aqueous solutions due to its high surface area, high surface-to-volume, magnetic property and reusability. Ni 0.5 Zn 0.5 Fe 2 O 4 nanoparticles was easily synthesized by co-precipitation method and characterized using X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques. The crystallite size of the prepared Ni 0.5 Zn 0.5 Fe 2 O 4 is in around 10.58 nm, which was calculated according to Scherrer equation. The effect of various parameters such as pH, amount of the adsorbent and contact time on the adsorption efficiency of Lead (II) ions on the adsorbent was studied. Equilibrium isotherm studies were carried out with different initial concentrations of Lead (II) ions and the experimental data were analyzed by the Langmuir adsorption model. The adsorption capacity for Lead (II) ions was obtained as 65.5 mg/g.
