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Multimedia Environmental Distribution of Engineered Nanomaterials

机译：工程纳米材料的多媒体环境分布

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摘要

A compartmental multimedia model was developed to enable evaluation of the dynamic environmental multimedia mass distribution and concentrations of engineered nanomaterials (ENMs). The approach considers the environment as a collection of compartments, linked via fundamental environmental intermedia transport processes. Model simulations for various environmental scenarios indicated that ENM accumulation in the sediment increased significantly with increased ENMs attachment to suspended solids in water. Atmospheric dry and wet depositions can be important pathways for ENMs input to the terrestrial environment in the absence of direct and distributed ENM release to soil. Increased ENM concentration in water due to atmospheric deposition (wet and dry) is expected as direct ENM release to water diminishes. However, for soluble ENMs dissolution can be the dominant pathway for suspended ENM removal from water even compared to advection. Mass accumulation in the multimedia environment for the evaluated ENMs (metal, metal oxides, carbon nanotubes (CNT), nanoclays) was mostly in the soil and sediment. The present modeling approach, as illustrated via different test cases, is suited for "what if" first tier analyses to assess the multimedia mass distribution of ENMs and associated potential exposure concentrations.
机译：开发了一个隔室多媒体模型，以能够评估动态环境多媒体质量分布和工程纳米材料（ENM）的浓度。该方法将环境视为隔间的集合，这些隔间通过基本的环境中间媒介传输过程链接在一起。针对各种环境情景的模型模拟表明，随着ENM对水中悬浮固体的附着增加，沉积物中的ENM积累显着增加。在没有将ENM直接和分散释放到土壤的情况下，大气干湿沉降可能是ENMs向陆地环境输入的重要途径。由于大气中直接ENM释放减少，预计由于大气沉积（干湿）会增加水中的ENM浓度。但是，对于可溶性ENM，即使与对流相比，溶解也可能是从水中悬浮ENM去除的主要途径。被评估的ENM（金属，金属氧化物，碳纳米管（CNT），纳米粘土）在多媒体环境中的质量积累主要在土壤和沉积物中。如通过不同的测试案例所说明的，本建模方法适用于“假设”第一层分析，以评估ENM的多媒体质量分布以及相关的潜在暴露浓度。

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  • 来源
    《Environmental Science & Technology》 |2014年第6期|3281-3292|共12页
  • 作者

    Haoyang Haven Liu; Yoram Cohen;

  • 作者单位

    Center for the Environmental Implications of Nanotechnology, California Nanosystems Institute, University of California, Los Angeles, California 90095, United States ,Chemical and Biomolecular Engineering Department, University of California, Los Angeles, Los Angeles, California 90095, United States;

    Center for the Environmental Implications of Nanotechnology, California Nanosystems Institute, University of California, Los Angeles, California 90095, United States ,Chemical and Biomolecular Engineering Department, University of California, Los Angeles, Los Angeles, California 90095, 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);
  • 原文格式 PDF
  • 正文语种 eng
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