CHEMICAL EFFECTS OF CONTINUOUS AND PULSED ULTRASOUND IN AQUEOUS-SOLUTIONS

被引：106

作者：

HENGLEIN, A

机构：

[1] Hahn-Meitner Institut, Bereich Physikalische Chemie

来源：

ULTRASONICS SONOCHEMISTRY | 1995年 / 2卷 / 02期

关键词：

PYROLYSIS; RADICAL REACTIONS; SUPERCRITICAL WATER; CAVITATION NUCLEI;

D O I：

10.1016/1350-4177(95)00022-X

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Molecules dissolved in water can undergo pyrolysis and free radical attack when cavitation is produced by ultrasound. Macromolecules are also degraded in the main chain. The yields of these processes depend on the volatility and hydrophobicity of the solutes and on the nature of the gas in the solution. The effects of 1 MHz (quartz) and 20 kHz (horn) are compared; the yield ratio of oxidation to mechanical degradation is strongly dependent on the cavitation conditions. Chemical effects produced by pulsed ultrasound are also described and compared with effects observed in continuous irradiation experiments.

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页码：S115 / S121

页数：7

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