摘要
Abstract
Ultrasound technology is a kind of environmentally friendly technology,which has the advantages of mild handling conditions, high efficiency and no secondary pollution to the environment. The paper discusses the mechanism of ultrasonic degradation of organic pollution in detail,and it also introduces the models of steady state cavitation and transient cavitation. The kinetic equation of ultrasonic degradation is summarized,and the general kinetic degradation equation is explained, which can help have further comprehend the ultrasonic degradation process. Simultaneously, this paper also introduces the application and research of single ultrasonic treatment technology in printing and dyeing wastewater,pesticide wastewater and pharmaceutical wastewater, and points out the shortcoming of single ultrasonic treatment technology. Various combined technologies, including ultrasound-ozone, ultrasound-Fenton oxidation,ultrasound-photo catalysis and ultrasound-zero valent iron,and the characteristics and combined mechanism of each technology are briefly described. Considering the effects of treatment, economy and environmental protection, most of ultrasonic technology and its combination technology are still in laboratory research. Finally,the problems that may be encountered in the application of ultrasonic treatment technology are summarized.关键词
水处理/超声波/联用技术/臭氧/Fenton/光催化Key words
water treatment/ultrasound/combined technology/ozone/Fenton/photo catalysis分类
通用工业技术
