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Release of silver nanoparticles from outdoor facades

机译:从室外外墙释放银纳米颗粒

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摘要

In this study we investigate the release of metallic silver nanoparticles (Ag-NP) from paints used for outdoor applications. A facade panel mounted on a model house was exposed to ambient weather conditions over a period of one year. The runoff volume of individual rain events was determined and the silver and titanium concentrations of 36 out of 65 runoff events were measured. Selected samples were prepared for electron microscopic analysis. A strong leaching of the Ag-NP was observed during the initial runoff events with a maximum concentration of 145 μ Ag/l. After a period of one year, more than 30% of the Ag-NP were released to the environment. Particles were mostly <15 nm and are released as composite colloids attached to the organic binders of the paint. Microscopic results indicate that the Ag-NP are likely transformed to considerably less toxic forms such as Ag_2S.
机译:在这项研究中,我们研究了用于户外应用的涂料中金属银纳米颗粒(Ag-NP)的释放。安装在样板房上的外墙板在一年的时间内暴露于环境天气条件下。确定了单个降雨事件的径流量,并测量了65个径流事件中36个的银和钛浓度。准备选定的样品用于电子显微镜分析。在最初的径流过程中观察到Ag-NP的强烈浸出,最大浓度为145μAg / l。一年后,超过30%的Ag-NP被释放到环境中。颗粒大多小于15 nm,并以附着在涂料有机粘合剂上的复合胶体形式释放。微观结果表明,Ag-NP可能转化为毒性较小的形式,例如Ag_2S。

著录项

  • 来源
    《Environmental pollution》 |2010年第9期|P.2900-2905|共6页
  • 作者单位

    Eawag, Swiss Federal Institute of Aquatic Science and Technology, UEberlandstrasse 133, 8600 Dubendorf, Switzerland;

    rnEawag, Swiss Federal Institute of Aquatic Science and Technology, UEberlandstrasse 133, 8600 Dubendorf, Switzerland;

    rnEawag, Swiss Federal Institute of Aquatic Science and Technology, UEberlandstrasse 133, 8600 Dubendorf, Switzerland;

    rnEmpa, Swiss Federal Institute for Material Science and Technology, UEberlandstrasse 129, 8600 Dubendorf, Switzerland;

    rnElectron Microscopy ETH Zurich (EMEZ), 8093 Zurich, Switzerland;

    rnEmpa, Swiss Federal Institute for Material Science and Technology, UEberlandstrasse 129, 8600 Dubendorf, Switzerland;

    rnEawag, Swiss Federal Institute of Aquatic Science and Technology, UEberlandstrasse 133, 8600 Dubendorf, Switzerland;

    rnEawag, Swiss Federal Institute of Aquatic Science and Technology, UEberlandstrasse 133, 8600 Dubendorf, Switzerland University of Applied Science Rapperswil, Institute of Environmental and Process Engineering UMTEC, Oberseestrasse 10, 8640 Rapperswil, 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
  • 中图分类
  • 关键词

    silver nanoparticles; exterior paints; electron microscopy; urban storm water runoff;

    机译:银纳米颗粒;外墙涂料;电子显微镜;城市雨水径流;

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