Methodological optimization for efficient degradation of Acid Violet 49 using advanced oxidation processes and varied photocatalyst combinations

Abstract

Abstract This study investigates the photodegradation of Acid Violet 49 in an aqueous medium under UV, UV/H2O2, and combined with photo catalyst (UV/H2O2/TiO2, UV/H2O2/ZnO, and UV/H2O2/SnO2). The impact of all operational parameters including catalytic dosage, peroxidation (H2O2), pH and dye concentration were evaluated. The degradation efficiency of AV49 was enhanced up to 96% with the alternative photocatalyst UV/H2O2/ZnO under the circumstances of 0.6mL H2O2, 0.9 g ZnO, 50 mg/L initial dye concentration, and pH 9 after 90 min. Hemolytic test were used to check the toxicity level of products. FTIR spectroscopy of UV/ZnO/H2O2 was applied to identify the functional group of AV49 before and end product of the degradation. Moreover, the analytical technique LC-MS provided valuable information regarding the degradation products of AV 49. A proposed pathway was identified based on the findings of the degradation product.

Keywords

• Photodegradation
• H2O2
• TiO2
• ZnO
• SnO2
• LC-MS