| 超声波/零价铁协同体系作用机理探讨 |
| |
| 引用本文： | 吴兰艳,戴友芝,李芬芳.超声波/零价铁协同体系作用机理探讨[J].环境工程,2012(Z2):417-419,439. |
| |
| 作者姓名： | 吴兰艳 戴友芝 李芬芳 |
| |
| 作者单位： | 铜仁学院生物科学与化学系;湘潭大学环境工程系;长沙环境保护职业技术学院环境科学系 |
| |
| 基金项目： | 国家自然科学基金资助项目(20477034) |
| |
| 摘 要： | 在超声波/零价铁协同体系中,探讨了OH.的产生途径及其影响因素,并分析了Fe0表面形态变化。结果表明:在超声波/零价铁体系中,羟基自由基的产生途径主要有四种:声空化导致水分子热解、Fenton反应、超声波与类Fenton反应的复合效应、铁粉颗粒效应;pH值过低或过高都不利于羟基自由基产生;当铁粉投加量为2.0g/L时最有利于羟基自由基产生;超声波通过冲刷、碎裂、清洗、气蚀和熔合等多种效应,活化和增强铁粉的表面性能。
|
| 关 键 词： | 超声波/零价铁 羟基自由基 产生途径 表面形态 |
DISCUSSION ON MECHANISM OF THE ULTRASOUND-ZERO-VALENT IRON COLLABORATIVE SYSTEM |
| |
| Wu Lanyan,Dai Youzhi,Li Fenfang.DISCUSSION ON MECHANISM OF THE ULTRASOUND-ZERO-VALENT IRON COLLABORATIVE SYSTEM[J].Environmental Engineering,2012(Z2):417-419,439. |
| |
| Authors: | Wu Lanyan Dai Youzhi Li Fenfang |
| |
| Institution: | 1.Department of Biological Sciences and Chemistry,Tongren University,Guizhou 554300,China; 2.Department of Environment Engineering,Xiangtan University,Xiangtan 411105,China; 3.Department of Environmental Science,Changsha Environmental Protection College,Changsha 411105,China) |
| |
| Abstract: | In the ultrasound-zero-valent iron system,the OH generation path and its impact factors and the change of Fe0 surface morphology were studied.The results indicate that there are four main paths in the hydroxyl radical production: molecular pyrolysis in the the cavitation process,Fenton reaction,the synergism of ultrasound and modified Fenton reaction,and the granular effect of Fe0.It is not conducive to the generation of hydroxyl free radicals under the condition of that the pH value is too low or too high in the ultrasound-zero-valent iron system.It is most favorable to the generation of hydroxyl radicals when iron dosage is 2.0g/L.The characterization of iron surface is highly activated and improved by erosion,fragmentation,cleaning,cavitation erosion and fusion of the acoustic cavitation. |
| |
| Keywords: | ultrasound-zero-valent iron hydroxyl radicals generation path surface morphology |
| 本文献已被 CNKI 等数据库收录！ |
|
