334 kHz 下超声空化活性的研究：声反应器几何参数的影响。
Investigation of sonochemical activities at a frequency of 334 kHz: the effect of geometric parameters of sonoreactor.
机构信息
School of Civil Environmental and Architecture Engineering, Korea University, Seoul 136-701, Republic of Korea.
Department of Civil Engineering, Faculty of Engineering, University of Malaya, Kulala Lumpur 50603, Malaysia.
出版信息
Ultrason Sonochem. 2014 Jul;21(4):1504-11. doi: 10.1016/j.ultsonch.2014.01.003. Epub 2014 Jan 13.
In this study, the effect of the dimensions of the bottom plate and liquid height was investigated for high-frequency sonoreactors under a vertically irradiated system. The dimensions of the bottom plate did not significantly influence sonochemical activity considering power density. However, as the bottom plate was increased in size, the hydroxyl radical generation rate decreased because of a decrease in power density. It is therefore recommended that sonoreactors with bottom-plate dimensions close to those of the ultrasonic transducer module be used. Liquid height had a significant effect on sonochemical activity, but the trend of the activity considering power density changed as the initial pollutant concentration changed. In the case of low initial concentration of As(III) (1 mg/L), the maximum cavitation yield for As(III) oxidation was observed at liquid heights of 150 mm.
在这项研究中，考察了高频声反应器在垂直辐照系统下底板尺寸和液体高度对其的影响。从功率密度的角度考虑，底板尺寸对声化学活性没有显著影响。然而，随着底板尺寸的增大，由于功率密度的降低，羟基自由基生成速率降低。因此，建议使用底板尺寸接近超声波换能器模块的声反应器。液体高度对声化学活性有显著影响，但考虑到功率密度，活性的趋势随着初始污染物浓度的变化而变化。在低初始浓度 As(III)(1mg/L)的情况下，在液体高度为 150mm 时观察到 As(III)氧化的最大空化产率。
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