| 模型沉积物中POPs的超声波降解 |
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| 引用本文： | 梁君,吴胜利,林直人,枝浩実,葛西荣輝.模型沉积物中POPs的超声波降解[J].北京科技大学学报,2007(Z2). |
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| 作者姓名： | 梁君 吴胜利 林直人 枝浩実 葛西荣輝 |
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| 作者单位： | 北京科技大学冶金与生态工程学院 北京100083(梁君，吴胜利)，日本东北大学环境科学研究科 仙台980-8577(林直人，■枝浩実，葛西荣輝) |
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| 摘 要： | 以六氯苯为例,用超声波辐射及与其它高级氧化技术(AOPs)相结合来降解持久性有机污染物(POPs).结果表明,当超声波辐射与紫外线辐射结合时,六氯苯的降解率与单一超声波辐射降解率几乎相同,分别为39.7%和40.0%;而当超声波辐射与光催化相结合时,由于所添加的TiO2颗粒促进了空穴的形成,降解率可提高到49.4%;当表面活性剂的质量分数提高到0.1%时,降解率可提高到49.2%;当用双频超声波辐射时,六氯苯的降解率高于任一单频超声波辐射.经过1h超声波辐射,20/176kHz双频、20kHz单频和176单频条件下,六氯苯降解率分别为57.5%,3.67%和41.0%.
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| 关 键 词： | POPs 超声波降解 高级氧化技术 六氯苯 |
Sonochemical degradation of POPs in model sediment |
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| LIANG Jun,WU Shengli,Naohito HAYASHI,Hiromi CHOSHI,Eiki KASAI Metallurgical and Ecological Engineering School,University of Science and Technology Beijing,Beijing ,China Graduate School of Environmental studies,Tohoku University,Sendai -,Japan.Sonochemical degradation of POPs in model sediment[J].Journal of University of Science and Technology Beijing,2007(Z2). |
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| Authors: | LIANG Jun WU Shengli Naohito HAYASHI Hiromi CHOSHI Eiki KASAI Metallurgical and Ecological Engineering School University of Science and Technology Beijing Beijing China Graduate School of Environmental studies Tohoku University Sendai - Japan |
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| Institution: | LIANG Jun1),WU Shengli1),Naohito HAYASHI2),Hiromi CHOSHI2),Eiki KASAI2)1) Metallurgical and Ecological Engineering School,University of Science and Technology Beijing,Beijing 100083,China 2) Graduate School of Environmental studies,Tohoku University,Sendai 980-8577,Japan |
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| Abstract: | The potential of hexachlorobenzen(HCB),one of POPs,decomposition by ultrasonic irradiation and its combination with other AOPs(advanced chemical oxidation processes) and surfactant addition was evaluated.Comparing the ultrasonic irradiation alone with the combination with the UV(ultraviolet) light irradiation,the degradation ratios were almost the same,40.0% and 39.7%,respectively.On the other hand,the degradation ratio increased to 49.4% when combining with photocatalysis possibly attributed to the promotion of the cavitation due to the addition of TiO2 particles.When the surfactant concentration was increased to 0.1%,the degradation ratio increased to 49.2%.It seemed that the added surfactant could contribute to desorbing HCB from the sediment surface and increasing the effective reaction surface area.The degradation ratio of HCB under the dual-frequency ultrasonic irradiation was higher than that under the mono-frequency ultrasonic irradiation.After 1 h ultrasonic irradiation,the degradation ratio was 57.5% for the dual-frequency ultrasound of 20/176 kHz combination,whereas 3.67% and 41.0 % for 20 and 176 kHz ultrasound,respectively. |
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| Keywords: | POPs sonochemical decomposition advanced chemical oxidation processes(AOPs) hexachlorobenzene |
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