Fe-Mn-Zn oxide trimetal alloy nanocomposite (FMZONC) fabricated and surface properties of the composite material revealed via several characterization methods. Porous nature and alloy type mixing of metals deduced from transmission electron microscopy analysis. Field emission scanning electron microscopy image revealed composite material is of size between 7 and 16 nm. The adsorption properties investigated through isotherm and kinetic experiments. In addition, pH effects and desorption properties were also studied. Maximum adsorption capacity (q max) 149 mg/g for phosphate removal observed at pH 6 and 0.20 g/L of adsorbent. Chemical interaction between metal hydroxide and phosphate elaborated from Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS).