Decoloration of Disperse blue 56 Using UV/H2O2/MWCNTs

In this study, oxidation of dye from colored wastewater by H2O2/ Multiwall Carbon Nanotubes solution assisted with UV radiation was investigated. Disperse Blue 56 was used as a model dye. Adsorption behavior of Disperse Blue 56 from aqueous solution onto Multiwall Carbon Nanotubes was investigated under various conditions such as initial pH value, dye concentration, H2O2 and Multiwall Carbon Nanotubes content. Maximum adsorption capacity for Disperse Blue 56 at pH 7.0, 5.0 and 3.0 was found to be 0.53, 0.56 and 0.97 mmol/g, respectively. Isotherm results demonstrated that the linear correlation coefficients and standard deviations of Nernest and Freundlich isotherms were specified and that the Freundlich isotherm best fitted the experimental results. The adsorption kinetics was more precisely denoted by a pseudo second-order model revealed by regression grades. Furthermore, it was shown that the UV/H2O2/ Multiwall Carbon Nanotubes process could be used as eco-friendly method to degrade dyes from colored wastewater.