2013 Volume 4 Issue 3 Pages 171-176
1,4-dioxane, which is widely used as an organic solvent and a stabilizer for chlorinated compounds, etc., is likely to contaminate inorganic liquid wastes containing harmful chemicals such as heavy metal ions in the laboratory because it can easily mix with water. We have to develop the process for disposing of those liquid wastes properly, considering that they can be taken in the university plant for the disposal of liquid wastes. In this study, 1,4-dioxane of approximately 30 mg/L in the water was treated for degradation using a UV/O3 treatment facility installed in the university. It is a bubble column reactor of 130 L in liquid volume. 1,4-dioxane was degraded by O3 treatment and its concentration was reduced to less than 0.3 mg/L, which meets the regulation of Japanese low, after the treatment for 80 min. O3 treatment with UV irradiation enhanced the degradation of 1,4-dioxane furthermore. 1,4-dioxane was not detected by this treatment for 30 min. Degradation rate of 1,4-dioxane by UV/O3 treatment is higher than those reported in the literature,indicating that the treatment by using this facility is effective for degrading 1,4-dioxane in the wastewater.