...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Kinetics and Mechanism of Benzene Derivative Degradation with Fenton's Reagent in Aqueous Medium Studied by MIMS
【24h】

Kinetics and Mechanism of Benzene Derivative Degradation with Fenton's Reagent in Aqueous Medium Studied by MIMS

机译：MIMS研究Fenton试剂在水介质中苯衍生物降解的动力学和机理。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Membrane introduction mass spectrometry (MIMS) was used to investigate kinetic and mechanistic aspects of the reaction of benzene derivatives with Fenton's reagent (Fe~(2+)/H_2O_2) in water. Under the conditions employed, the reaction rate showed a first-order dependence on the aromatic compound concentration. The order of reactivity observed was C_6H_5Cl > C_6H_5Br > C_6H_6 > C_6H_5CH_3 > C_6H_5OCH_3 > C_6H_5NO_2 > C_6H_5OH, and, with the exception of C_6H_5NO_2, a linear Hammett relationship (log k_X/k_H versus σ_p) was observed. This fact suggests that electronic factors significantly influence reactivity with the Fenton's reagent. Experiments with C_6H_6 and C_6D_6 showed the presence of an isotopic effect of k_H/k_D = 1.7, suggesting that cleavage of the benzene C-H bond occurs in the reaction rate controlling step. Mechanistic studies with chlorobenzene showed that mineralization to CO_2 and chloride proceeds via hydroxylation steps producing phenolic, hydroquinonic, and quinonic intermediates.
机译：膜引入质谱法（MIMS）用于研究苯衍生物与芬顿试剂（Fe〜（2 +）/ H_2O_2）在水中反应的动力学和机理。在所采用的条件下，反应速率显示出对芳族化合物浓度的一级依赖性。观察到的反应顺序为C_6H_5Cl> C_6H_5Br> C_6H_6> C_6H_5CH_3> C_6H_5OCH_3> C_6H_5NO_2> C_6H_5OH，并且除C_6H_5NO_2以外，均观察到线性哈米特关系（对数k_X / p_）。这一事实表明，电子因素会显着影响与Fenton试剂的反应性。用C_6H_6和C_6D_6进行的实验表明，存在同位素效应k_H / k_D = 1.7，这表明在反应速率控制步骤中发生了苯C-H键的裂解。用氯苯进行的机理研究表明，矿化成CO_2和氯化物是通过羟基化步骤进行的，生成酚，氢醌和喹啉中间体。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号