• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Environmental Management >Effect of chloride ions on the oxidation of aniline by Fenton's reagent
【24h】

Effect of chloride ions on the oxidation of aniline by Fenton's reagent

机译：Fenton试剂对氯离子对苯胺氧化的影响

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

The objective of this study was to experimentally probe the mechanism of chloride ions specifically affecting aniline oxidation by Fenton's reagent. Batch experiments were carried out to investigate the effects of pH, Fe2+, 11,02 and chloride concentration on the oxidation reaction. Results show that the inhibition caused by chloride ions can be overcome by extending the reaction time if the concentration of chloride ions is low. At a high concentration of chloride ions, however, the oxidation of aniline was inhibited, and actually ceased due to the complexation of Fe-Cl. In this study, the chloride ion concentration was kept at 0.2 M in the experiments when studying the effect of ferrous ion concentration on the Fenton reaction. If the ratio of [Cl-]/[Fe2+] was <= 200, the inhibition effect was very significant. In other words, adding more ferrous ions rather than hydrogen peroxide can break the inhibition originating from the chloride ions at an initial stage of pH 3. The inhibition effect of chloride ions on the aniline reaction depended on the reaction pH; the extent of inhibition decreased with increasing the initial pH as long as the pH was less than 5. Consequently, the inhibition effect by chloride ions was primarily due to the complexation of iron species and chloride ions. The influence of chloride ions on aniline oxidation due to the competition of hydroxyl radicals was not significant.(c) 2005 Elsevier Ltd. All rights reserved.
机译：这项研究的目的是实验性地探究氯离子对芬顿试剂对苯胺氧化的特殊影响机理。进行批处理实验以研究pH，Fe2 +，11,02和氯化物浓度对氧化反应的影响。结果表明，如果氯离子浓度低，则可以通过延长反应时间来克服由氯离子引起的抑制作用。然而，在高浓度的氯离子下，苯胺的氧化被抑制，并且由于Fe-Cl的络合而实际上停止了。在这项研究中，当研究亚铁离子浓度对Fenton反应的影响时，实验中的氯离子浓度保持在0.2M。如果[Cl-] / [Fe2 +]之比≤200，则抑制效果非常显着。换句话说，添加更多的亚铁离子而不是过氧化氢可以破坏在pH值3初始阶段源自氯离子的抑制作用。氯离子对苯胺反应的抑制作用取决于反应的pH；只要pH值小于5，抑制程度就随初始pH的增加而降低。因此，氯离子的抑制作用主要是由于铁与氯离子的络合。由于羟基自由基的竞争，氯离子对苯胺氧化的影响并不显着。（c）2005 Elsevier Ltd.保留所有权利。

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