Research had been carried out on the preparation of silica composites from rice husk with Fe3O4 and its application to adsorption methylene blue dyes. Preparation materials were characterized using XRD, SEM-EDS and VSM. Silica adsorption on methylene blue dye was carried out with 2 variables, namely the influence of contact time and the effect of concentration. XRD diffractogram showed that sil…