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首页> 外文期刊>Environmental Science & Technology >Quantification and Characterization of Ti-, Ce-, and Ag-Nanoparticles in Global Surface Waters and Precipitation
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Quantification and Characterization of Ti-, Ce-, and Ag-Nanoparticles in Global Surface Waters and Precipitation

机译：全球表面水和沉淀中Ti-，Ce-和Ag纳米粒子的定量和表征

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摘要

Nanoparticle (NP) emissions to the environment are increasing as a result of anthropogenic activities, prompting concerns for ecosystems and human health. In order to evaluate the risk of NPs, it is necessary to know their concentrations in various environmental compartments on regional and global scales; however, these data have remained largely elusive due to the analytical difficulties of measuring NPs in complex natural matrices. Here, we measure NP concentrations and sizes for Ti-, Ce-, and Ag-containing NPs in numerous global surface waters and precipitation samples, and we provide insights into their compositions and origins (natural or anthropogenic). The results link NP occurrences and distributions to particle type, origin, and sampling location. Based on measurements from 46 sites across 13 countries, total Ti- and Ce-NP concentrations (regardless of origin) were often found to be within 10~4 to 10~7 NP mL~(-1), whereas Ag NPs exhibited sporadic occurrences with low concentrations generally up to 10~5 NP mL~(-1). This generally corresponded to mass concentrations of ＜1 ng L~(-1) for Ag-NPs, ＜100 μg L~(-1) for Ce-NPs, and ＜10μg L(-1) for Ti-NPs, given that measured sizes were often below 15 nm for Ce- and Ag-NPs and above 30 nm for Ti-NPs. In view of current toxicological data, the observed NP levels do not yet appear to exceed toxicity thresholds for the environment or human health; however, NPs of likely anthropogenic origins appear to be already substantial in certain areas, such as urban centers. This work lays the foundation for broader experimental NP surveys, which will be critical for reliable NP risk assessments and the regulation of nano-enabled products.
机译：由于人为活动，环境的纳米粒子（NP）排放正在增加，促进生态系统和人类健康的担忧。为了评估NPS的风险，有必要在区域和全球范围内以各种环境统计分区认识它们的浓度;然而，由于在复杂的自然基质中测量NPS的分析困难，这些数据在很大程度上难以捉摸。在这里，我们测量含有含有含有Ti的NP浓度和尺寸，含有含有众多全球性表面水域和降水样品的含量，并且我们提供了它们的组合物和起源（天然或人为）的见解。结果将NP出现和分布到粒子类型，原点和采样位置。根据来自13个国家的46个地点的测量，总Ti和CE-NP浓度（无论原点如何）通常被发现在10〜4至10〜7 np ml〜（-1）范围内，而Ag NPS表现出散发性出现低浓度通常高达10〜5 np ml〜（-1）。这通常对应于用于Ce-NPS的Ag-NPS，<100μg1-（-1）的1ng L〜（-1）的质量浓度，以及Ti-nps的<10μgl（-1），给出测量尺寸通常低于15nm，对于Ce-and Ag-nps，对于Ti-nps以上30nm。鉴于目前的毒理数据，观察到的NP水平尚未出现环境或人类健康的毒性阈值;然而，可能的人为起源的NPS似乎在某些领域，如城市中心。这项工作为更广泛的实验NP调查奠定了基础，这对于可靠的NP风险评估和对纳米产品的调节至关重要。

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  • 来源
    《Environmental Science & Technology》 |2021年第14期|9836-9844|共9页
  • 作者

    Agil Azimzada; Ibrahim Jreije; Madjid Hadioui; Phil Shaw; Jeffrey M. Farner; Kevin J. Wilkinson;

  • 作者单位

    Department of Chemistry University of Montreal Montreal Quebec H3C 3J7 Canada Department of Chemical Engineering McGill University Montreal Quebec H3A 0C5 Canada;

    Department of Chemistry University of Montreal Montreal Quebec H3C 3J7 Canada;

    Department of Chemistry University of Montreal Montreal Quebec H3C 3J7 Canada;

    Nu Instruments Wrexham LL13 9XS U.K.;

    Department of Civil and Environmental Engineering University of Alberta Edmonton Alberta T6G 1H9 Canada;

    Department of Chemistry University of Montreal Montreal Quebec H3C 3J7 Canada;

  • 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
  • 中图分类
  • 关键词

    titania; ceria; silver; engineered nanoparticles; rain; surface waters; environmental impact;

    机译：泰坦尼亚;Ceria;银;工程纳米粒子;雨;表面水;对环境造成的影响;

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