Mohan Selvan, Princz Juliska, Ormeci Banu, DeRosa Maria C
Department of Chemistry, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada.
Environment and Climate Change Canada, 335 River Road South, Ottawa, ON K1V 1C7, Canada.
Nanomaterials (Basel). 2019 Sep 5;9(9):1258. doi: 10.3390/nano9091258.
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 AgS. 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.
由于工程纳米材料在消费品中的广泛应用，人们对其环境归宿和影响的兴趣与日俱增。特别是，鉴于越来越多的证据表明纳米材料在其整个产品生命周期中会发生显著变化，在环境测试中使用原始纳米材料的适当性正受到质疑。本研究结合透射电子显微镜（TEM）、能量色散X射线光谱（EDS）、X射线光电子能谱（XPS）和电感耦合等离子体质谱（ICP-MS），考察了模拟纳米产品典型生命周期条件对形态和成分的影响，从含银纳米颗粒（AgNP）纺织品的生产，到其使用、洗涤，最后是在废水收集系统中的浸出和培养。这些模拟老化条件显示了AgNP转化为AgCl和AgS的证据。无论在培养前对纳米颗粒进行何种初始老化处理，在原废水中培养对AgNP的转化影响最为显著。然而，尽管观察到广泛的转化，但在使用场景后的所有样品中仍存在AgNP。
