| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Outline of Final Research Achievements |
In this work, we examined the influence of transducer structure on the mechanical and chemical effects of 20 kHz sonication. The mechanical effects were evaluated from the degradation rate of poly(ethylene oxide) in aqueous solution, and the chemical effects were measured with potassium iodide solution. The mechanical and chemical effects for a bath-type apparatus with the transducers fixed at a node with a diameter of 50 mm highest among the transducers investigated here.
As liquid height increased, the stable sonochemical efficiency gained at a height of over 120 mm, and the sonochemical efficiency were also markedly higher than those of a conventional horn-type one.
The degradation rate of poly(ethylene oxide) in aqueous solutions involving titanium oxide was the highest when ultraviolet irradiation was used concurrently.
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