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首页> 外文会议>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
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Effect of pH, Palladium and Iron Content on Dechlorination of Pentachlorophenol Using Smectite Supported Iron-Palladium Bimetallic System

机译：用蒙脱石负载铁钯双金属系统对PH，钯和铁含量对五氯苯酚脱氯的影响

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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：蒙脱石支持具有不同钯和/或铁载荷的PD0 / Fe0双金属系统。本研究研究了pH，钯含量和铁含量对五氯苯酚（PCP）脱氯率的影响。使用伪第一阶动力学模型以适应脱氯数据。结果表明，当PH为6.0〜8.0时，脱氯速率恒定线性降低，脱氯率加速1.74折，随着使用蒙脱石的PD0 / Fe0作为还原剂的PD0 / Fe0减少。相比之下，PCP脱氯率与使用蒙脱石支持的ZVI作为还原剂无关。当PD负载小于0.065％时，PCP脱氯率恒定显示对PD含量的线性依赖性。然而，当PDContent进一步增加到粘土的0.25％时，转化率不再增加。 PCP脱氯率也高度依赖于双金属系统中的铁含量，并且可以将蒙脱石和PCP伪一阶脱氯酸盐恒定的铁含量之间的关系描述为线性。

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