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Reactive Transport Modeling of ZVI Column Experiments for Nickel Remediation

机译:用于镍修复的ZVI柱实验的反应运输模型

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摘要

MIN3P, a multicomponent reactive transport model for variably saturated porous media, is used to simulate the outputs of column tests carried out using zero valent iron (ZVI) for nickel contaminated groundwater remediation. The objective of this study is to investigate the main chemical reactions involved in contaminant removal and the main causes of the reactivity decline of ZVI over time. According to the results of the model the major causes of ZVI reactivity loss is identified in the mineral precipitation of α-FeOOH on iron surface that probably caused ZVI passivation and led to a decline of the electron transfer rate. An existing empirical relationship between mineral precipitation and the reactivity loss of ZVI, included in the model, reproduced the changes in nickel removal observed during different laboratory column tests.
机译:MIN3P是用于可变饱和多孔介质的多组分反应输运模型,用于模拟使用零价铁(ZVI)进行镍污染的地下水修复所进行的柱测试的输出。这项研究的目的是调查与污染物去除有关的主要化学反应以及ZVI反应性随时间下降的主要原因。根据模型的结果,在铁表面α-FeO​​OH的矿物沉淀中发现了ZVI反应性损失的主要原因,这可能导致ZVI钝化并导致电子传输速率下降。模型中包含的矿物质沉淀与ZVI反应性损失之间的现有经验关系,再现了在不同实验室柱测试中观察到的镍去除量的变化。

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  • 来源
    《Ground Water Monitoring & Remediation》 |2013年第1期|97-104|共8页
  • 作者单位

    Mechanics and Materials Department, Faculty of Engineering, Mediterranean University of Reggio Calabria, Via Graziella, loc. Feo di Vito, 89122 Reggio Calabria (RC), Italy;

    Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1;

    Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1;

    Mechanics and Materials Department, Faculty of Engineering, Mediterranean University of Reggio Calabria, Via Graziella, loc. Feo di Vito, 89122 Reggio Calabria (RC), Italy;

    Mechanics and Materials Department, Faculty of Engineering, Mediterranean University of Reggio Calabria, Via Graziella, loc. Feo di Vito, 89122 Reggio Calabria (RC), Italy;

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