| 水溶液中臭氧和溴离子的反应研究 |
| 摘要点击 4381 全文点击 1806 投稿时间：2011-11-11 修订日期：2012-01-16 |
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| 中文关键词 臭氧 氧化 溴离子 溴酸根 反应机制 |
| 英文关键词 ozone oxidation bromide bromate reaction mechanism |
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| 中文摘要 |
| 为探明 O3氧化 Br-的反应机制,采用离子色谱、PDA紫外-可见光度仪研究了水中Br- 被O3氧化的反应过程. 离子色谱分析表明,被氧化的Br-中只有约10%被O3氧化成BrO3-. 进一步研究表明,除了生成BrO3-外,Br- 被O3氧化过程中还产生了Br2, Br2又与溶液中存在的Br- 结合形成Br3-,并首次得到了Br3-的吸收光谱,测得Br3-的最大吸收峰λmax为260 nm,提出了 Br- 与O3的基元反应. 该研究补充和完善了O3氧化Br-的反应机制,也为O3处理含Br- 水时Br- 的归趋提供了有益信息. |
| 英文摘要 |
| The reaction mechanism of O3 with bromide ion in aqueous solution was studied by ion chromatography and UV-Vis spectrometry instruments. Ion chromatography analysis showed that only 10% of Br- which was oxidized by ozone was formed into bromate ion. The results demonstrated that the final products of the oxidation reaction were identified as Br2 and Br3- except for BrO3-. The formation of Br3- which was yielded from the reaction of Br2 with Br- was the major process in the reaction of Br- attacked by O3. The characteristic absorption spectrum of Br3- with an absorption peak at 260 nm was also investigated. The results may provide helpful information about the mechanism of the oxidation reaction of Br- with O3 and fate of Br- or its derivatives in the environment by the oxidation processes. |
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