Abstract
The u1trasonic degradation of Bisphenol A, which is an endocrine disruptor, was investigated. The effect of the dissolved gases of argon, oxygen, air and nitrogen, was studied. In recent years, the environmental pollutants which are mainly concerned with an endocrine disruptor are a threat to society. Since these chemical contaminants are hard to be decomposed, the many new decomposing methods have been proposed. The ultrasonic irradiation method is one of them. The ultrasound was generated using a concave transducer of 500 kHz at 25℃ under various gases. Of the four dissolved gases, the highest degradation rate was obtained for oxygen. A characteristic decomposition intermediate was detected for gases containing oxygen. The intermediate was identified by GC-MS. The enhancement of the decomposition rate seems to be ascribable to the intermediate.
