Determination of optimization adsorption parameter of Methylene Blue Dye in Aqueous Medium by Synthesis of TiO2 – Cellulos e Acetate Nanocomposite

One of the present environmental concerns in the developed country is the removal of dyes from coloured effluents, in particular from the textile industry. Several methods of removal of these dyes from wastewater have been reported, but they are very costly and cannot be used effectively to treat an extensive range of such wastewaters. Thus, in this work, we investigated the removal of methylene blue dye from aqueous solution using titanium oxide nanoparticles coated with cellulose acetate from sugarcane bagasse. This novel and low-cost adsorbent was characterized with Fourier Transform Infrared Spectrophotometer (FTIR), Scanning Electron Microscopy-Electron Dispersive Spectroscopy (SEM-EDS) and Transform Electron Microscopy (TEM). Batch adsorption experimental was performed for the optimization of the parameters, such as initial dye concentration, contact time, adsorbent dosage, and pH and temperature of dye solution. The SEM-EDS shows different large pores with agglomerations which supported by BET surface area analysis. The adsorptionof methylene blue was pH dependent and the highest removal (9.543 mg/g) was obtained at pH 6. The results obtained followed the pseudo-second-order kinetics; the adsorption was fitted well to the Langmuir isotherm model where the maximum adsorption capacity (Qmax) was 10.572 mg/gand the thermodynamic study shows the spontaneity, endothermic and accompanied by high degree of randomness. The study suggested that a titanium oxide-cellulose acetate nanoparticle is a potential low-cost adsorbent for the dye removal from industrial wastewater.