Removal evaluation of Acid Yellow 17 Dye from aqueous solution by multi-wall carbon nanotubes

Textile industries have been one of the important and basic industries of every country and are the mother of many other industries. In this type of industries due to the use of various dyes in different processes of production and product processing, the produced wastewater has also been highly colored and it must be refined before being discharged to the environment. In this study potential adsorption of multi-wall carbon nanotubes on separating Acid Yellow 17 dye from aqueous solution using adsorption method, surface response method for optimization and process modeling,was investigated. Tests were performed discontinuously (100ml flasks) and at laboratory scale by determining amount of absorbed color according to surface response method and central composite design method. The results showed that the effect of initial dye concentration and amount used of carbon nanotube are efficient factors on dye absorption process from aqueous environment. The best conditions for color adsorption are equilibrium time of 30 minutes, initial dye concentration of 24/45 mg per liter and adsorbent dose of 75/47 mg in 100 ml with a maximum efficiency of about 98/27 percent. According to the results obtained from this study, color adsorption from aqueous solutions, using carbon nanotubes is feasible with high efficiency.