Biosorption of Reactive Blue 19 Dye using dried Azolla Filiculoides

Industrial wastewater is one of the major environmental pollutants. Discharge of the colorful industrial waste into the receptive waters leads to eutrophication and has mutagenic and carcinogenic properties In order to understand the biosorption of Reactive Blue 19 (RB19) textile dye on dried Azolla filiculoides, batch experiments were conducted under various conditions. Adsorption isotherms were examined by Freundlich, Langmuir isotherm that finally showed the both models closely fitted the experimental results. The maximum monolayer adsorption capacities of Azolla biomass are 13.74 mg/g at 273 K, 14.98 mg/g at 298 K and 16.44 at 318 K, respectively. The results showed that the removal ratio of RB19 reached 95.4% from wastewater containing 50 mg/L RB19, indicating that the biomass could be used as a potential biosorbent for the removal of RB19 from aqueous solution.