P1 超音波霧化を利用した水中有機物のオゾン酸化-気泡塔との比較

概要

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Methylene blue(MB) solutions were oxidized by ozone containing gas through two operation modes, "bubbles in liquid"(BL) and "droplets in gas"(DG). A bubble column producing bubbles of about 2mm in diameter was used forBL. As for DG, MB solution is ultrasonically atomized and is brought into contact with the gas containing ozone. The droplet diameter is less than 10μm. Under various conditions of ozone concentration or contacting time, changes of MB concentration were measured, and apparent rate constants of MB oxidation were determined. The rate constants for DG were approximately four orders magnitude bigger than those for BL. Required time to oxidize 99% of initial amount of MB was compared between BL and DG. The results suggest that the time for DG is 1s and that for BL is 3x10^4s. Ultrasonic atomization is advantageous for oxidizing organics with gas of low ozone concentration.
日本ソノケミストリー学会の論文
2005-10-14