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首页> 美国卫生研究院文献>Nanomaterials >Morphological Transformation of Silver Nanoparticles from Commercial Products: Modeling from Product Incorporation Weathering through Use Scenarios and Leaching into Wastewater
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Morphological Transformation of Silver Nanoparticles from Commercial Products: Modeling from Product Incorporation Weathering through Use Scenarios and Leaching into Wastewater

机译：商业产品中银纳米颗粒的形态转化：产品整合建模使用场景的风化以及向废水的浸出

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摘要

There is increasing interest in the environmental fate and effects of engineered nanomaterials due to their ubiquitous use in consumer products. In particular, given the mounting evidence that dramatic transformations can occur to a nanomaterial throughout its product lifecycle, the appropriateness of using pristine nanomaterials in environmental testing is being questioned. Using a combination of transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma-mass spectrometry (ICP-MS), this work examines the morphological and compositional effects of conditions mimicking a typical lifecycle of a nano-enabled product, from the production of the silver nanoparticle (AgNP)-laden textiles, through its use, laundering, and then finally, its leaching and incubation in the wastewater collection system. These simulated weathering conditions showed evidence for the transformation of AgNPs into AgCl and Ag2S. Incubation in raw wastewater had the most dramatic effect on the AgNPs in terms of transformation, no matter what initial weathering was applied to the NPs prior to incubation. However, despite extensive transformation noted, AgNPs were still present within all the samples after the use scenarios.
机译：由于工程纳米材料在消费产品中的普遍使用，人们对环境命运和工程纳米材料的影响越来越感兴趣。特别是，鉴于越来越多的证据表明纳米材料可以在其整个产品生命周期中发生巨大的转变，因此人们质疑在环境测试中使用原始纳米材料的适当性。通过结合使用透射电子显微镜（TEM），能量色散X射线光谱（EDS），X射线光电子光谱（XPS）和电感耦合等离子体质谱（ICP-MS），这项工作检查了形态和成分从负载银纳米颗粒（AgNP）的纺织品的生产到使用，洗涤以及最终在废水收集系统中的浸出和孵化，都模仿了具有纳米功能的产品的典型生命周期的条件的影响。这些模拟的风化条件显示了将AgNP转化为AgCl和Ag2S的证据。无论在培养之前对NPs进行何种初始风化处理，原废水的培养对AgNPs的转化影响最大。但是，尽管注意到进行了广泛的转化，但使用场景后，所有样品中仍存在AgNP。

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