| O3/UV降解喹啉过程中不同氧化剂的相对重要性 |
| 摘要点击 1136 全文点击 1058 投稿时间：2002-07-06 修订日期：2002-11-16 |
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| 中文关键词 O3/UV 喹啉 ·OH 靛蓝二磺酸钠法 ·OH探针化合物法 降解速率 |
| 英文关键词 Ozone/UV quinoline hydroxyl radical indigo method method ·OH-probe compound method degradation rate |
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| 中文摘要 |
| 研究O3/UV降解自配喹啉水溶液时水体中存在的不同氧化剂对喹啉降解的相对重要性的结果表明,O3和·OH是喹啉降解过程的主要氧化剂.通过靛蓝二磺酸钠法和·OH探针化合物(对氯苯甲酸)法分别测定了水体中的O3浓度和·OH浓度,定量地计算了O3和·OH在降解喹啉时的相对重要性,得到喹啉与·OH的二级反应速率常数为6.65×109mol·(L·s)-1.在本试验条件下,由·OH引起的喹啉去除率占总去除率的88%,而由O3引起的喹啉去除率占总去除率的12%.提高水体中·OH的浓度有利于提高喹啉的总降解速率. |
| 英文摘要 |
| In this paper the relative importance of different oxidants in the degradation process of quinoline using O3/UV was studied. O3 and ·OH played the most important roles in removing quinoline. Their concentrations were measured using indigo method and ·OH-robe compound (p-CBA) method respectively, and the relative importance of these two oxidants was quantitatively determined. The secondorder reaction rate constant between quinoline and hydroxyl radical was calculated as 6. 65×109mol·(L·s)-1 . In the present experimental condition, ·OH and O3 oxidations contributing to the total degradation rate of quinoline were 88% and 12% respectively. Increasing the hydroxyl radical concentration will help to improve the total removal rate of quinoline. |
