REMOVAL OF ORANGE II DYE FROM WATER USING ZnO AND ITS ACID TREATED FORMS

Abstract

Catalytic wet air oxidation is one of the major alternatives for the degradation of waste water. In the present work, ZnO treated with 0.5, 0.75, 1.0N H₂SO₄ for 5 h was used as the catalyst for wet oxidation of Orange II dye in water. The catalysts were characterized by FT-IR and BET adsorption isotherm method. The oxidation was carried out at room temperature under various reaction parameters like dye concentration, catalyst loading, initial pH and temperature. The results show that the acid treated ZnO could be an effective catalyst for wet oxidation of Orange II (1.0 mg/L). The final products found were less harmful for the environment.