: Textile industry is a source of water pollution. Nowadays, wastewater containing dyes is a serious environment problem because of the high toxicity an accumulation in the environment. In this study, multi-walled carbon nanotube was use an adsorbent for adsorption Disperse Blue19, Disperse Blue 75 and Disperse Reactive from the aquatic environment. The effect of various operating parameters such as initial concentration of dye (120, 500, 1160 ppm) , adsorbent dosage (0.1, 1, 3 gr/lit) and pH (4.5 , 7, 10.5) was investigated. The effectiveness of dye removal and optimization of water treatment conditions have been investigated in a Taguchi experimental design. Disperse Blue29 (DB29) and Disperse Reactive (DR) from aqueous solution. After investigating the pH effect on adsorption presses, other parameters such as amount of adsorbent, contact time, concentration of Disperse Blue19, Disperse Reactive blue were optimized by one at the time methods. The optimum condition for adsorbent was set as follows: 500.0 mg L-1 for dye concentration, 1 g for the adsorbent dosage and 90 minutes for contact time with predicted removal of 85.19 for Disperse Blue19 and 95.9 for Disperse Reactive the optimum condition for adsorbent was set as follows: 120 mg L-1 for Disperse Blue 75 concentration, 3 g for the adsorbent dosage and 120 minutes for contact time with predicted removal of 73.3% for Disperse Blue75.The accuracy and ability of method at optimum values predicted by this model was studied by conduction of similar experiments at the same previously optimized conditions. Following optimization of variables, fitting the experimental data to various conventional methods reveal that pseudo second order kinetic model. Among the well known isotherm models, the experimental equilibrium data efficiently can be represented by the Langmuir model. The thermodynamic parameters such as Gi free energy changes (?G 0 ), enthalpy (?H 0 ) and entropy (?S 0 ) was calculated. Negative values (?G 0 ) and positive value (?H 0 ) shows that adsorption of Disperse Blue19, Disperse Blue 79 and Disperse Reactive at prepared adsorbent, is a spontaneous and endothermic process
