| 电化学-臭氧耦合氧化体系的氧化效能 |
| 摘要点击 1902 全文点击 1148 投稿时间：2009-11-12 修订日期：2010-01-18 |
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| 中文关键词 电解 臭氧 耦合 氧化效能 对氯苯酚 |
| 英文关键词 electrolysis ozonation coupling oxidative efficiency 4-chlorophenol |
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| 中文摘要 |
| 利用电化学-臭氧耦合氧化体系降解了水中的对氯苯酚，从动力学角度探讨了耦合氧化体系降解有机物的协同作用机制.结果表明，电化学与臭氧耦合氧化体系降解4-CP具有明显的协同效果，900 s后，该耦合氧化体系对4-CP和COD的去除率分别为92.7%和64.9%；而单独电解与单独臭氧氧化对上述两者去除率的之和仅有69.7%和30.1%.氧还原产物H2O2浓度和光电流的测试结果表明，电化学-臭氧耦合氧化体系的协同机制包括两部分：即臭氧在阴极表面得到电子生成臭氧负离子；溶解氧在阴极表面发生还原反应生成H2O2.以上2个因素均能有效地促进体系\5OH的形成. |
| 英文摘要 |
| The oxidation system of electrolysis coupled ozonation (electrolysis-ozonation) was used to degrade 4-chlorophenol (4-CP), and its mechanism was discussed on the basis of kinetic analysis. The experimental results indicated the electrolysis-ozonation system had a significant synergistic effect during degradation of 4-CP. For example, the electrolysis-ozonation had the 4-CP removal rate of 92.7% and the COD removal rate of 64.9% in 900 s, respectively; while electrolysis alone plus ozonation alone only had the 4-CP removal rate of 69.7% and the COD removal rate of 30.1% under the same conditions. The results of H2O2 concentration analysis and photocurrent test showed that the synergistic mechanism of electrolysis-ozonation included two factors: ①production of ·O-3at the cathode; ② H2O2 generation resulting from reduction of dissolved oxygen. The above two factors led to generation of \5OH in system effectively. |
