| US/H2O2系统协同降解苯酚的动力学研究 |
| |
| 引用本文： | 史惠祥,赵德明,雷乐成,汪大翚. US/H2O2系统协同降解苯酚的动力学研究[J]. 化工学报, 2003, 54(10): 1436-1441 |
| |
| 作者姓名： | 史惠祥 赵德明 雷乐成 汪大翚 |
| |
| 作者单位： | 浙江大学环境工程研究所，浙江 杭州 310027;浙江工业大学化工与材料学院，浙江 杭州 310032 ; |
| |
| 基金项目： | 国家自然科学基金资助项目(No.20176053). |
| |
| 摘 要： | 超声波/过氧化氢（US/H2O2）复合氧化过程在废水处理领域有很广泛的应用前景，但在动力学方面的研究很少，为此研究了US/H2O2工艺降解苯酚的动力学.结果表明，苯酚在单独超声波辐射（US）、过氧化氢（H2O2）氧化和超声波/过氧化氢（US/H2O2）协同下的降解均符合表观一级动力学.在单独的超声波辐射或者过氧化氢氧化下苯酚去除率很小，而在复合氧化过程US/H2O2工艺中有显著的提高，表明协同效应存在.苯酚去除的速率常数增强因子可达到6.904.进一步从US/H2O2系统中存在US、H2O2和羟基自由基（•OH）3部分协同作用的降解机理，推导出了简化的机理动力学模型，很好地反应过氧化氢浓度过量条件下苯酚的降解.
|
| 关 键 词： | 超声波/过氧化氢 苯酚 协同效应 动力学 |
| 文章编号： | 0438-1157(2003)10-1436-06 |
| 收稿时间： | 2002-11-11 |
| 修稿时间： | 2002-11-11 |
SYNERGETIC KINETICS OF PHENOL DEGRADATION IN WATER USING ULTRASONIC/H2O2 SYSTEM |
| |
| SHI Huixiang,ZHAO Deming,LEI Lecheng,WANG Dahui. SYNERGETIC KINETICS OF PHENOL DEGRADATION IN WATER USING ULTRASONIC/H2O2 SYSTEM[J]. Journal of Chemical Industry and Engineering(China), 2003, 54(10): 1436-1441 |
| |
| Authors: | SHI Huixiang ZHAO Deming LEI Lecheng WANG Dahui |
| |
| Abstract: | Though the ultrasonic/H2O2 process shows potential application for wastewater treatment, there were only a few reports on degradation kinetics. In this paper, the synergetic kinetics of phenol degradation in water by using ultrasonic/H2O2 system was studied. It was found that phenol degradation followed pseudo-first order reaction under individual ultrasonic radiation or H2O2 process, while it was significantly enhanced in the combined ultrasonic/H2O2 system. This indicated that there exist synergetic effects in the ultrasonic/H2O2 process and it was found that the enhancement factor for phenol degradation rate constant was about 6.904. A simplified mechanistic model for phenol degradation was derived by accounting for the contribution of individual ultrasonic radiation, H2O2 oxidation and hydroxyl radical in the combined ultrasonic/H2O2 system. The model was proved to be well suitable for the phenol degradation in the presence of surplus H2O2. |
| |
| Keywords: | US/H2O2 phenol synergetic effects kinetics |
|
| 点击此处可从《化工学报》浏览原始摘要信息 |
|
点击此处可从《化工学报》下载免费的PDF全文 |
