There has been investigation on the adsorption of the methylene blue dye using Fe3O4/SDS composites and Fe3O4 compounds. The coprecipitation process was used to create the adsorbent material. XRD, BET, VSM, and FTIR are used to characterize materials. The diffraction peaks of Fe3O4/SDS 1:1 and 2:1 are similar to JCPDS 65 - 3107 from Fe3O4. Fe3O4/SDS 1:1 and Fe3O4/SDS 2:1 have surface areas of 1…