抄録
The degradation of dyes (Acid Orange 52, Acid Blue 92, Mordant Yellow 10, Naphthol Blue Black) in aqueous solutions was investigated by using three processes (Photocatalysis, Sonolysis, and Photocatalysis with sonication (Hybrid) ). In the case of Photocatalysis, although the concentration of acid orange 52 decreased to 35% in 480 min, the color of the solution was not disappeared. In the case of Sonolysis, it was decomposed completely in 300 min, but the TOC (total organic carbon) concentration decreased to about 87% in 480 min. In the case of Photocatalysis with sonication, the concentration of it reached to 0 in 240 min and the TOC concentration decreased to about 13% in 480 min. The similar results were obtained in the cases of other dyes. These results indicate that the irradiation of ultrasonic enhanced the Photocatalysis. The addition of choride ion (50ppm) to acid orange 52 solution decreased the decomposition efficiency of Photocatalysis. In the cases of Sonolysis and Photocatalysis with sonication, the decomposition efficiency changed hardly by the addition of chloride ion. These results indicate the chloride ion disturbs the photocatalysis of dye, but the decomposition of dye using the irradiation of ultrasonic is not influenced by the chloride ion. From these results, it is considered that the Photocatalysis with sonication is most effective for the decomposition of dye among the three processes in this study.
