Adsorption of Alizarine Red-S Dye from Aqueous Solution by Cane Sugar Bagasse: Resolution of Isotherm, Kinetic and Thermodynamics

摘要

Textile effluent contains huge quantities of toxic chemicals and high level chemical oxygen demands, which gets directly discharged into natural water bodies, thus contaminating the water quality. These effluents require prior treatment before being discharged into natural aqueous systems. In the present study, a novel low-cost, highly efficient, eco-friendly adsorbent cane sugar bagasse obtained from an industrial waste raw material is utilized for the removal of Alizarine Red-S from aqueous solution. Parameters that influence the adsorption process such as contact time, initial dye concentration, dosage of adsorbent, temperature, pH, agitation speed, activation time and desorption studies were studied in batch experiments. The experimental data were analysed using adsorption isotherm models like Freundlich, Langmuir, Dubinin-Radushkevich, Temkin, Jovanovic and Flory-Huggins. Kinetic studies showed that a pseudo-second order model was more suitable than the pseudo-first order model. Various thermodynamic parameters have also been calculated. It is concluded that cane sugar bagasse is a good adsorbent for removal of color from textile waste water.