• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring >Effect of pH, Palladium and Iron Content on Dechlorination of Pentachlorophenol Using Smectite Supported Iron-Palladium Bimetallic System
【24h】

Effect of pH, Palladium and Iron Content on Dechlorination of Pentachlorophenol Using Smectite Supported Iron-Palladium Bimetallic System

机译：蒙脱石负载铁钯双金属体系对pH，钯和铁含量对五氯苯酚脱氯的影响

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Smectite supported Pd0/Fe0 bimetallic systems with different palladium and/or iron loading were prepared. Effect of pH, palladium content, and iron content on pentachlorophenol (PCP) dechlorination rate was investigated in this study. The pseudo-first-order kinetic model was employed to fit the dechlorination data. The results show that the dechlorination rate constant decreases linearly as we increase the pH when the pH is 6.0~8.0 and the dechlorination rate accelerated by 1.74 folds with the decreasing of per pHunite using smectite supported Pd0/Fe0 as reductant. By contrast, the PCP dechlorination rate is independent of pHvalues using smectite supported ZVI as reductant. The PCP dechlorination rate constant shows linear dependence on the Pd content when Pd loading is less than 0.065%. However, the transformation rate no longer has great increase when the Pdcontent further increases to 0.25% to clay. The PCP dechlorination rate is also highly dependent on iron content in bimetallic system, and the relationship between the iron content in smectite and PCP pseudo-first-order dechlorinationrate constant can be described as linear.
机译：制备了具有不同钯和/或铁负载量的蒙脱石负载的Pd0 / Fe0双金属体系。研究了pH，钯含量和铁含量对五氯苯酚（PCP）脱氯速率的影响。拟一级动力学模型用于拟合脱氯数据。结果表明，当蒙脱石负载的Pd0 / Fe0为还原剂时，随着pH值的降低，脱氯速率常数随pH值的增加而线性增加，随着pH值的升高，pH值逐渐升高，脱氯速率常数随着脱磷速率的增加而加快1.74倍。相比之下，使用蒙脱石负载的ZVI作为还原剂，PCP的脱氯速率与pH值无关。当Pd负载量小于0.065％时，PCP的脱氯速率常数显示出对Pd含量的线性依赖性。但是，当Pd含量进一步增加到粘土的0.25％时，相变速率不再有很大的提高。 PCP脱氯速率也高度依赖于双金属体系中的铁含量，蒙脱石中铁含量与PCP伪一级脱氯速率常数之间的关系可以描述为线性。

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