Synthesis of magnetite nanoparticles (Fe3O4) of beach sand of Padang, West Sumatra using 2-stage ball milling method and its application for the degrading of methylene blue has been done. Identification of the elements in the sample was carried out using X-Ray Fluorescence (XRF). The morphological properties of magnetic nanoparticles were studied using Scanning Electron Microscopy (SEM). T…