Biodecolorization of azo dye Acid Blue 92 (AB92) by Ceratophyllum de-mersum L.: process optimization using Taguchi method and toxicity as-sessment

This study evaluated the ability of submerged aquatic plant Ceratophyllum demersum to remove Acid Blue 92 (AB92) dye. The effect some operational parameters such as reaction time, initial dye concentration, biomass, and pH, on removal efficiency was studied. Based Taguchi’s results, optimized conditions for were time 7 days, concentration 20 mg l-1, biomass 4 g, pH 5. Fourier-transform infrared spectroscopy (FTIR) results confirmed interaction between molecules plants. this study, C. had a reusability dye, fact confirming mechanism biodegradation in process. Also, AB92 physiological responses investigated. Minimum relative growth rate, tolerance index, chlorophyll a, b, total chlorophyll, carotenoids at l-1 observed. cyanidin glycoside, lipid peroxidation, antioxidant activity increased both concentrations 10 l-1. It can be concluded that induced risk oxidative stress Ceratophyllum.