Journal of Aquatic Ecology

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Azo group dyes are the most important group of commercial dyes and the widest dyes which are used in various industries. The release of effluents containing these compounds into the environment leads to several problems such as reduced photosynthesis and plant growth, and reduced water quality. In the present study, the effect of three different concentrations (0, 10, 20 mg / L) of Acidic Blue dye 92 (AB92) on the physiological characteristics of aquatic plant Ceratophyllum demersum such as photosynthetic pigments, cyanidin glycoside concentration, the ability to scavenging free radicals and lipid peroxidation were investigated during 7 days. According to results, the amount of chlorophyll a, chlorophyll b, total chlorophyll, and total carotenoid decreased in the concentration of 20 mg / L compared to the control by 15.38, 18, 16.88, and 45.1%, respectively. The concentration of cyanidin glycoside, lipid peroxidation, and antioxidant activity increased in both 10 and 20 mg / L, since at 20 mg / L concentration so that these parameters were increased in comparison with control by 81.8%, 69.5 %, and 14.29 %, respectively. Thus, the presence of both 10 and 20 mg / L of Acidic Blue dye 92 induced antioxidant activity and the risk of oxidative stress for Ceratophyllum demersum.

Keywords: Antioxidant, effluent, Azo dye, Ceratophyllum demersum, oxidative stress

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