The direct discharge of colored and toxic wastewater into the environment affects its ecological status by causing various undesirable changes [1]. Industrial dyes have complex structures which make them stable and difficult to biodegrade. Therefore, the removal of colored components from wastewater is one of the biggest issues of concern [2]. Adsorption is one of the most promising alternative techniques to remove dyes from wastewater due to its simple operation, superior effectiveness, relatively low cost, and almost harmless byproducts [5,6]. Recently, magnetic nanocomposites are widely used as adsorbent in polluted water treatment. [4,5]. In this study we set out to obtain nanoparticles which combines very good adsorption capacity of the carbon-based materials with magnetic properties of the iron oxides, and to test them as potential adsorbents for the removal of anionic and cationic dyes from aqueous solutions. The synthesis of magnetic nanocomposites (CAN) was performed by the combustion method, and the effect of working conditions: specific surface of active carbon, reaction time and magnetite/carbon ratio were investigated. The resulted powders were characterized by X-Ray diffraction (XRD), FT-IR, energy-dispersive X-ray spectroscopy(EXD), specific surface area(BET), N2 adsorption–desorption isotherms and thermal analysis (TG/DSC). In order to evaluate the potential application in dye wastewater treatment, the obtained nanocomposites were tested as adsorbents for the removal of Acid Orange 7 (AO7), Chromazurol S (Ch-S), Methylene Blue (MB), and Basic Red 1 (RB1) dyes from aqueous solutions. The adsorption process was optimized by investigating the influence of solution pH (2÷12), magnetite/carbon ratio, adsorbent dose (0.25÷3 g/L), initial dye concentration (10÷300 mg/L), and temperature (298, 318, 328 K) on the dye removal. The increase of the carbon content increases the removal efficiency, and the removal efficiency increases with increasing dose of CAN, and temperature, and by decreasing the initial dye concentration for investigated dyes. By working at normal conditions, the synthesized materials showed removal efficiency higher than 90.00% for all investigated dyes. The experimental data were well correlated by the pseudo-second-order kinetic model and the Langmuir adsorption isotherm. The adsorbents efficiency was demonstrated after four adsorption-desorption cycles, when efficiencies greater than 65% were obtained, indicating the possible industrial application. Acknowledgements. This work was supported by program no 2, Project no. 2.4 from Coriolan Drăgulescu” Institute of Chemistry Timisoara of Romanian