P-11 超音波照射による木材からの有機塩素化合物の除去性能(ポスターセッション)

概要

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The solvent cleaning is hard to remove PCB from porous material such as wood and paper. The use of powerful ultrasound in the cleaning of surfaces of manufactured objects is well known. Recently, it has been reported that the membrane cleaning process was enhanced by the ultrasonic irradiation. In this study, the removal performance of chlorinated organic compounds from porous material by ultrasonic irradiation is experimentally examined. Wood chip impregnated with o-dichlorobenzene was used as the sample. The removal rate for ultrasonic irradiation was much higher than that for shaking. The removal ratio depended hardly on the ultrasonic frequency and temperature, but was strongly controlled by the ultrasonic intensity. In order to investigate the behavior of liquid exchange in pore, the Stefan tube was used. The effects of diameter and depth of pore on the behavior of o-dichlorobenzene removal were small. However, when the position of tube top was set at the maximum of particle velocity by ultrasound, the amount of o-dichlorobenzene removal was high. The effect of kind of dissolved gas in solvent was small. From these results, it is considered that o-dichlorobenzene in pore is removed from the sample mainly by the longitudinal vibration near sample surface.
日本ソノケミストリー学会の論文
2004-11-11