The Leucaena leucocephala L. are medium size, fast growing plant belong to Fabaceae family. it’s called miracle tree due to its medical and antibacterial properties . The important of using Nps in water treatment are purification and remediation. Through the utilization of the leaf extract of the Leucaena leucocephala (Lam). Plant. The purpose of this research is to synthesis nanoparticles of zinc acetate (ZnO), iron oxide (FeO), and iron doped zinc acetate (Fe doped ZnO) utilizing environmentally friendly synthesis techniques. In order to characterize these particles, a technique known as Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were utilized. These two distinct methods confirmed the creation of nanoparticles composed of zinc oxide, iron oxide, and iron-zinc oxide. This study have been used ZnO, FeO and Fe doped ZnO nanoparticles to remove crude oil from water in pH 4, 7 and 10 in various time. For the purpose of determining How will oil is removed, the total organic carbon methods (TOC) have been measured. Although the maximum removal efficiency RE% of oil in oily water treated by ZnO Nps was 92% in pH (10), the highest RE% in oily water treated by FeO Nps was 97% in pH (7and 10). Both of these results were obtained in oily water. At pH levels of 7 and 10, the RE% of oil in oily water that had been treated by Fe-ZnO Nps achieved their highest point of 99%. The findings suggested that the utilization of ZnO, FeO, and Fe-doped ZnO nanoparticles as a coagulant was an environmentally friendly and efficient method for removing oil from water that had been polluted by crude oil.