| O3/H2O2降解水中扑灭通效能研究 |
| 摘要点击 1639 全文点击 722 投稿时间：2011-05-20 修订日期：2011-08-23 |
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| 中文关键词 扑灭通 臭氧过氧化氢 高级氧化 产物 降解途径 |
| 英文关键词 Prometon O3/H2O2 advanced oxidation process (AOP) products degradation path |
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| 中文摘要 |
| 利用拟一级降解速率常数表征O3/H2O2对扑灭通(Prometon)的氧化效能,探讨了n(H2O2)/n(O3)、pH值、水质和碳酸氢根离子对去除的影响,对有机氧化产物进行了气相和液相质谱分析,以离子色谱法测定了反应过程中产生的NO3-,在此基础上对扑灭通降解途径进行了研究.结果表明,扑灭通初始浓度2 mg·L-1,反应温度25℃,O3投量13 mg·L-1时,最佳反应条件为n(H2O2)/n(O3)=0.7,体系pH 为7~8; 扑灭通在自来水中的去除效果好于纯水; HCO3-浓度>50 mg·L-1时,对扑灭通的氧化有明显的抑制作用.液质和气质的分析结果表明扑灭通并未开环,氧化过程中扑灭通三嗪环支链上的2个异丙基首先被氧化脱去,离子色谱检测到的NO3-是三嗪环支链胺基氧化的产物. |
| 英文摘要 |
| The removal efficiency of Prometon degraded by O3/H2O2 advanced oxidation process (AOP) was represented by the pseudo-first-rate order to discuss the effect of n(H2O2)/n(O3),pH, water quality and HCO3-.The organic products were characterized by GC/MS and LC/MS and NO3-produced during degradation was determined by IC, on the basis of which the degradation path of Prometon was also investigated. The result indicated that when concentration of Prometon was 2 mg·L-1, dosage of ozone was 13 mg·L-1, the reactive temperature was 25℃,the optimal condition of degradation was as follows, n(H2O2)/n(O3)=0.7, pH 7-8; The micro inorganic and organic substances in tap water promoted the removal rate of the Prometon comparing to that in pure water, and HCO3- showed inhibition effect on degradation. The results of GC/MS and LC/MS suggested that the triazine ring of Prometon was not destroyed during the AOP,the two isopropyl of triazine ring were disengaged firstly, and the NO3-detected by IC might be the oxidation product of the amido of the triazine ring. |
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