Important challenges in the global water situation, mainly resulting from worldwide population growth and climate change, require novel innovative water technologies in order to ensure a supply of drinking water and reduce global water pollution. The development of cost-effective and stable materials and methods for providing the fresh water in adequate amounts is the need of the water industry. Traditional water/wastewater treatment technologies remain ineffective for providing adequate safe water due to increasing demand of water coupled with stringent health guidelines and emerging contaminants. Nanotechnology-based multifunctional and highly efficient processes are providing affordable solutions to water/wastewater treatments that do not rely on large infrastructures or centralized systems. The aim of the present work is to study the possible applications of nanostructured adsorbent based on carbon which is functionalized multi wall carbon nanotubes synthesized in Algeria at LEREC laboratory in Annaba University, for the removal of organic pollutants from wastewater. Before the study of adsorption processes, our adsorbent was characterized by different methods such us DRX, MEB, IR and BET. The effect of different operational parameters like contact time, initial dye concentration , adsorbent dose, pH and temperature on the sorption of behavior was studied in batch mode. Experiments showed that the O-MWCNTs was efficient for the removal of the organic pollutant and the equilibrium can be reached in 60 minutes. The removal efficiency was found to be dependent on the initial micropolluant concentration and there is no significant effect of temperature on the adsorption process. Also, acidic pH was found the favor disperse dyes removal, while the adsorption capacity decreases proportionately with the functionalized multi wall carbon nanotubes dosage.