| Summary: | Advanced oxidation processes (AOPs) have emerged as a promising approach for the removal of organic dyes from effluents. Different AOPs were employed for the degradation of Reactive Yellow 160A (RY-160A) dye, i.e., SnO<sub>2</sub>/UV/H<sub>2</sub>O<sub>2</sub> and TiO<sub>2</sub>/UV/H<sub>2</sub>O<sub>2</sub>. In the case of UV treatment, maximum degradation of 28% was observed, while UV/H<sub>2</sub>O<sub>2</sub> furnished 77.78% degradation, and UV/H<sub>2</sub>O<sub>2</sub>/TiO<sub>2</sub> degraded the RY-160A dye up to 90.40% (RY-160A 30 mg/L, 0.8 mL of H<sub>2</sub>O<sub>2</sub>). The dye degradation was 82.66% in the case of UV/H<sub>2</sub>O<sub>2</sub>/SnO<sub>2</sub> at pH 3. FTIR and LC-MS analyses were performed in order to monitor the degradation by-products. The cytotoxicity and mutagenicity of RY-160A dye were evaluated by hemolytic and Ames (TA98 and TA100 strains) assays. It was observed that the RY-160A dye solution was toxic before treatment, and toxicity was reduced significantly after treatment. Results indicated that UV/H<sub>2</sub>O<sub>2</sub>/TiO<sub>2</sub> is more efficient at degrading RY-160A versus other AOPs, which have potential application for the remediation of dyes in textile effluents.
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