Today, increasing public concern and stricter international regulations have challenged the environmental problem associated with wastewater. In fact, the removal of pollutants from wastewater is still far from a satisfactory solution. Various processes are used to treat wastewater. However, these technologies are often either inefficient, produce secondary products, or, worse, are very expensive. In fact, the selection of a specific wastewater treatment technology should not be based solely on its efficiency, but should integrate environmental and economic aspects. In this framework, the main goal of this thesis is to remove various pollutants in water, including dyes and pharmaceutical compounds, through the absorption process, which is an environmentally friendly technology. For this purpose, magnetic nanoparticles γ-Fe2O3/MWCNTs/Cellulose and γ-Fe2O3/MWCNTs/Ag were successfully synthesized, which are used to prepare multi-walled carbon nanotubes (MWCNTs) from waste tires by chemical vapor deposition technique and in the center of silver nanoparticles from plant extract. Viscum album was used. These nano adsorbents were used to remove malachite green dye and sulfamethazine drug from aqueous solution in discontinuous and continuous systems. Physical and chemical properties of the resulting nanoparticles using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), dynamic light scattering (DLS), Fourier transform infrared spectroscopy FTIR), vibrating sample magnetism (VSM), zeta potential and surface area analyzer (BET), X-ray photoelectron spectroscopy (XPS) and thermal stability analysis (TGA) were detected. The results showed that Fe2O3/MWCNTs/Cellulose and γ-Fe2O3/MWCNTs/Ag nanoabsorbents can be used as an excellent adsorbent to remove dyes and drugs from aqueous solutions, so that the capacity of these nanoabsorbents to remove malachite green dye and sulfamethazine drug