Adsorption of Indigo Dye Using Magnetic Chitosan-Itaconic Acid Nano Fibers and Investigation of Kinetics and Absorption Isotherm Models

Today, the treatment of industrial wastewater, including textile is in a high importance. Actually the use of nanomaterials in the removal of wastewater from sewage has attracted widespread attention in recent years. The color of the Indigo is one of these pollutants. In this study, optimum nano fiber chitosan-itaconic acid was prepared using experimental design and in the following adsorption of Indigo dye wastewater treatment and the study of its kinetics and its isotherm was investigated. X-ray diffraction (XRD), Field Emission Scanning Electron Microscopes (FESEM), Infrared Fourier Transform (FT-IR), Vibrational Sampler Magnetic Meter (VSM) and thermal gravimetric analysis (TGA) are also used to study synthesize nano-fibers. Also, the effect of the initial concentrations of pollutants for absorbance, contact time, temperature and pH were investigated.In this study, the optimal concentration of Indigo 100 ppm, optimal time of 45 minutes and optimal pH 3 was obtained. The mechanism absorption of chitosan-itaconic acid follows the pseudo first-order kinetics and Freundlich isotherm model.