Potential Utilization of Sugar Industry Waste for Removal of Color from Textile Industry Effluent

The aim of this research was to study the utilization of bagasse (sugar industry waste) as adsorbents for removal of red and violet dyes. The dyes namely red C4G and violet 5BN used in textile industry for polyester and silk coloring respectively. The sorption of these dyes to bagasse and the characterization of the adsorptive property of the biomass for color removal were investigated by batch experiment. The influence of operating conditions like time, initial dye concentration and pH on process performance was also evaluated. Dye removal by bagasse was influenced by the pH of the solution, initial dye concentration, and time. Kinetic studies showed that the concentrations of C4G decreased very rapidly initially and remained nearly constant after 80 minutes but for 5BN rate of reaction was comparatively slow and after 240 minutes the concentration reached constant value. The maximum removal of C4G and 5BN on low-cost bagasse adsorbent was at pH 5.5 and pH 2 respectively. Maximum C4G and 5BN removal capacity of the bagasse was found 3.24 mg / g and 0.51 mg / g at 200 mg / l initial dye concentration. Kinetic experiment was conducted and validated for Lagrange's pseudo-first and second order system. It was observed that for C4G dye the reaction follows pseudo-second order rate constant and for 5BN dye reaction follows pseudo-first order rate constant. The Langmuir and Freundlich adsorption isotherm model were used to describe the equilibrium behavior of the system. The efficiency of the sorption was 99% and 76% for C4G and 5BN respectively.