抄録
Many persistent organic compounds are difficult to dissolve and to be decomposed in water solvent by using the methods such as photocatalyst and so on. However, they are soluble in organic solvents and hence are possible to be decomposed in the solvents. In this study, we investigated the decomposition of chlorobenzene (CB) and Trichlorobenzene (TCB) with various concentrations in water and a couple of organic solvents by ultrasound. Ultrasonic irradiation was carried out at 20℃ in a water bath with an ultrasonic generator (Kaijo 4021, 200 kHz, 200W) under an argon atmosphere. The degradation rate of TCB in water solvent increased with concentration up to a concentration of about 0.5 mM, while it became constant above 0.5 mM. In organic solvents such as methanol, butanol and so on, the degradation rates of TCB and CB with a concentration of 2 mM was almost the same as that in water solvent for TCB and smaller than that in water solvent for CB. From these results, little effect of the organic solvents was observed on the decomposition of CB and TCB.
