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频率对声致羟自由基形成的影响 被引量:18
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作者 赵逸云 冯若 +2 位作者 杨晓云 鲍慈光 李铷 《声学技术》 CSCD 1998年第1期12-14,共3页
本文用声化学效率的概念,报道了频率对声致羟自由基形成的影响,在氮气或空气环境中,高频(800kHz)超声辐照所致·OH的化学产率比低频(38.4kHz)超声辐照时高。
关键词 声化学频率 声致形成 羟自由基 超声辐照
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Sonolysis and mineralization of pentachlorophenol by means of varying parameters 被引量:4
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作者 SHENZhuang-zhi CHENGJian-zheng WUSheng-ju 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2004年第3期431-435,共5页
Degradation effect of organic pollutant on pentachlorophenol(PCP) is researched by ultrasound. PCP is treated by low frequency(16 kHz) and high frequency(800±1 kHz), and bi frequency. The results of investigatio... Degradation effect of organic pollutant on pentachlorophenol(PCP) is researched by ultrasound. PCP is treated by low frequency(16 kHz) and high frequency(800±1 kHz), and bi frequency. The results of investigation on the ultrasonic destruction of PCP showed that the rate of PCP degradation at the same conditions is the highest at bi frequency, and the lowest at 16 kHz. In the presence of Fenton type reagent the degradation rate of PCP is the highest at bi frequency(20 93 times) as compared to the stirring system. This ratio is 4 91 and 1 06 at 800 kHz and 16 kHz, respectively. The studies showed the bi frequency is an effective method for pollutants degradation, but it is need make further study. Taking 800 kHz for example, under the same conditions, the smaller pH of the solution, the higher is the reaction rate. A similar situation applied to TOC, but the TOC removal lags behind degradation of PCP. This indicated the PCP is not completely mineralized. The ultrasound is somewhat enhanced for degradation of PCP and mineralization with only addition of CuSO 4, but the combination of ultrasound and Fenton type reagent is effective method for PCP degradation and mineralization. The rate of PCP degradation and TOC removal appeared to follow pseudo first order reaction kinetic law. 展开更多
关键词 sonochemistry Fenton type reagent bi frequency PENTACHLOROPHENOL hydroxyl radical
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