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首页> 外文期刊>Environmental Science & Technology >Influence of Dissolved Organic Matter on the Environmental Fate of Metals, Nanoparticles, and Colloids
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Influence of Dissolved Organic Matter on the Environmental Fate of Metals, Nanoparticles, and Colloids

机译：溶解的有机物对金属，纳米粒子和胶体的环境命运的影响

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摘要

We have known for decades that dissolved organic matter (DOM) plays a critical role in the biogeochemical cycling of trace metals and the mobility of colloidal particles in aquatic environments. In recent years, concerns about the ecological and human health effects of metal-based engineered nanoparticles released into natural waters have increased efforts to better define the nature of DOM interactions with metals and surfaces Nanomaterials exhibit unique properties and enhanced reactivities that are not apparent in larger materials of the same composition1'2 or dissolved ions of metals that comprise the nanoparticles. These nanoparticle-specific properties generally result from the relatively large proportion of the atoms located at the surface, which leads to very high specific surface areas and a high proportion of crystal lattice imperfections relative to exposed surface area. Nanoscale colloids are ubiquitous in nature, and many engineered nanomaterials have analogs in the natural world. The properties of these materials, whether natural on manmade, are poorly understood, and new challenges have been presented in assessing their environmental fate. These challenges are particularly relevant in aquatic environments where interactions with DOM are key, albeit often overlooked, moderators of reactivity at the molecular and nanocolloidal scales.
机译：几十年来，我们已经知道，溶解有机物（DOM）在痕量金属的生物地球化学循环以及水环境中胶体颗粒的迁移中起着至关重要的作用。近年来，人们对释放到天然水中的金属基纳米粒子的生态和人类健康影响的关注加大了努力，以更好地定义DOM与金属和表面相互作用的性质。具有相同组成的材料1'2或构成纳米颗粒的金属溶解离子。这些纳米粒子特有的性质通常是由于位于表面的原子比例相对较大而导致的，这导致非常高的比表面积和相对于暴露的表面积而言很大比例的晶格缺陷。纳米级胶体在自然界无处不在，许多工程纳米材料在自然界都有类似物。这些材料的特性，无论是人造的，还是天然的，人们对此知之甚少，在评估其环境命运方面也提出了新的挑战。这些挑战在水生环境中尤为重要，在水生环境中，与DOM的相互作用是关键的（尽管经常被忽视），在分子和纳米胶体尺度上是反应的调节剂。

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  • 来源
    《Environmental Science & Technology》 |2011年第8期|p.3196-3201|共6页
  • 作者

    George R. Aiken; Heileen Hsu-Kim; Joseph N. Ryan;

  • 作者单位

    U.S. Geological Survey, 3215 Marine Street, Boulder, Colorado 80303, United States;

    Department of Civil and Environmental Engineering, Duke University, Box 90287, Durham, North Carolina 27708,United States;

    Department of Civil, Environmental, and Architectural Engineering, University of Colorado, Boulder, Colorado 80309,United States;

  • 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);
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  • 正文语种 eng
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