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首页> 外文期刊>Environmental Science & Technology >What Factors Determine the Retention Behavior of Engineered Nanomaterials in Saturated Porous Media?
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What Factors Determine the Retention Behavior of Engineered Nanomaterials in Saturated Porous Media?

机译：哪些因素决定了工程纳米材料在饱和多孔介质中的保留行为？

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摘要

A fundamental problem associated with the vertical transport of engineered nanomaterials (ENMs) in saturated porous media is the occurrence of nonexponential, for example, nonmonotonic or linearly increasing, retention profiles. To investigate this problem, we compiled an extensive database of ENMs transport experiments in saturated porous media. Using this database we trained a decision tree that shows the order of importance, and range of influence, of the physicochemical factors that control the retention profile shape. Our results help identify domains where current particle-transport models can be used, but also highlight, for the first time, large domains where nonexponential retention profiles dominate and new approaches are needed to understand ENM transport. Importantly, highly advective flow and high ENM influent mass can mask the influence of other physicochemical factors on the retention profile shape; notably, this occurs in 50% of the experiments investigated. Where the relationship between physicochemical factors and retention profile shape can be investigated in detail, our results agree with, and provide validation for, the current understanding of how these factors influence ENM transport.
机译：与工程纳米材料（ENM）在饱和多孔介质中的垂直运输相关的基本问题是发生非指数（例如非单调或线性增加）的保留曲线。为了研究这个问题，我们在饱和多孔介质中建立了一个广泛的ENM迁移实验数据库。使用该数据库，我们训练了决策树，该决策树显示了控制保留曲线形状的物理化学因素的重要性顺序和影响范围。我们的结果有助于确定可以使用当前粒子传输模型的领域，但同时也首次突出显示了非指数保留特征占主导地位的大领域，并且需要采用新方法来理解ENM传输。重要的是，高对流流动和高ENM进水量可以掩盖其他物理化学因素对保留轮廓形状的影响。值得注意的是，这发生在所研究的实验的50％中。在可以详细研究理化因素与保留曲线形状之间的关系的情况下，我们的结果与目前对这些因素如何影响ENM转运的理解相吻合，并提供了验证。

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  • 来源
    《Environmental Science & Technology》 |2017年第5期|2729-2737|共9页
  • 作者

    Eli Goldberg; Coy McNew; Martin Scheringer; Thomas D. Bucheli; Peter Nelson; Konrad Hungerbuhler;

  • 作者单位

    Institute for Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland;

    Department of Land, Air, and Water Resources, University of California, Davis, California 95616, United States;

    RECETOX, Masaryk University, 625 00 Brno, Czech Republic;

    Agroscope Institute for Sustainability Sciences ISS, 8046 Zürich, Switzerland;

    Aware Engineering GmbH, 8050 Zürich, Switzerland;

    Institute for Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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