REMOVAL OF DISPERSE RED 152 USING OZONE COMBINED WITH ULTRASOUND

Abstract

The removal of organic dyes from wastewater is essential to protect the ecosystem and human health. This study evaluated the ability of the ozone system combined with ultrasound to remove organic pigment disperse red 152 (DR152). Factors affecting DR152 removal efficiency such as the combined effects of ozone and ultrasound, pH of the solution, ozone dose, DR152 concentration, and temperature have been systematically studied. The results showed that the combination of ozone and ultrasound increased removal efficiency significantly with a combined coefficient of 1.72. The kinetics of the treatment process followed the first-order kinetic model. Optimal conditions for the treatment process included pH = 7, ozone dose of 700 mg/h, and temperature of 50 ^oC. The results also showed that the efficiency and reaction rate depended significantly on the initial concentration of the dye. The results obtained in this study demonstrate that the combined ozone and ultrasound system has great potential for application in removing organic dyes from wastewater.