In this project, for the first time, magnetic nanoparticles coated with nitrogen-doped graphene were used to remove BTEX from water sources. In addition to having a large number of aromatic rings, this adsorbent has the ability to interact π-π with benzene rings in BTEX, also due to the presence of nitrogen groups on the surface of graphene, has increased the hydrophilicity of this adsorbent. Also, because an external magnetic field was used to extract the sample, the extraction time was shorter and the separation was easier, as there was no need to centrifuge and filter the sample after extraction. In addition, since all the BTEX contaminants adsorbed on this adsorbent will be released by the desorption step, this adsorbent can be used sequentially in water and wastewater treatment. Therefore, the cost spent in this plan is very small compared to other projects in this field and is economically justifiable.