Decomposition of aqueous ozone in the presence of aromatic organic solutes
Decomposition of aqueous ozone in the presence of aromatic organic solutes
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DOI：
10.1016/j.watres.2004.09.004
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发表时间：
2005-01-01
期刊：
影响因子：
12.8
通讯作者：
Jekel, M
中科院分区：
文献类型：
--
作者：
Pi, YZ;Schumacher, J;Jekel, M
臭氧水溶液的分解主要是由于OH。自由基链式反应一些芳香族化合物已被发现极大地加速臭氧在缓冲水中的分解，尽管它们与臭氧的直接反应非常低。过氧化氢已被检测为该过程中的重要中间产物。因此，本研究提出了一种反应途径（芳环双右箭头烯烃双右箭头H2 O2双右箭头HO 2-）。芳环与OH反应。自由基或臭氧以产生烯烃。所形成的烯烃立即与臭氧反应并转化为H2 O2部分H2 O2解离为HO 2-，这强烈加速了臭氧水溶液的分解。一个新的连锁反应出现了。所提出的反应途径比另一种促进途径，如甲醇，甲酸或葡萄糖促进的水溶液臭氧分解快得多。(C)2004爱思唯尔有限公司保留所有权利。
The decomposition of aqueous ozone is mainly due to the OH. radical chain reaction. Some aromatic compounds have been found to tremendously accelerate ozone decomposition in buffered water although their direct reactions with ozone are very low. Hydrogen peroxide has been detected as an important intermediate product in this process. Therefore, a reaction pathway (aromatic ring double right arrow olefin double right arrow H2O2 double right arrow HO2-) is proposed in this study. Aromatic rings react with OH. radicals or ozone to yield olefins. The olefin formed immediately reacts with ozone and is converted to H2O2 Parts of H2O2 dissociate to HO2-, which strongly accelerates aqueous ozone decomposition. Therefore, a new chain reaction appears. The proposed reaction pathway is much faster than another promotion pathway, such as aqueous ozone decomposition promoted by methanol, formic acid or glucose. (C) 2004 Elsevier Ltd. All rights reserved.