a Center for Molecular Protein Science, Department of Biochemistry and Structural Biology , Lund University , Lund , Sweden.
c Aquatic Ecology, Department of Biology , Lund University , Lund , Sweden.
Nanotoxicology. 2018 Feb;12(1):79-89. doi: 10.1080/17435390.2017.1421274. Epub 2018 Jan 15.
As the production and usage of nanomaterials are increasing so are the concerns related to the release of the material into nature. Tungsten carbide (WC) is widely used for its hard metal properties, although its use, in for instance tyre studs, may result in nano-sized particles ending up in nature. Here, we evaluate the potential long-term exposure effects of WC nanoparticles on a pelagic (Daphnia magna) and a benthic (Asellus aquaticus) organism. No long-term effects were observed in the benthic system with respect to population dynamics or ecosystem services. However, long-term exposure of D. magna resulted in increased time to first reproduction and, if the particles were resuspended, strong effects on survival and reproductive output. Hence, the considerable differences in acute vs. long-term exposure studies revealed here emphasize the need for more long-term studies if we are to understand the effects of nanoparticles in natural systems.
随着纳米材料的生产和使用不断增加，人们对材料释放到自然环境中的相关问题的担忧也日益增加。碳化钨 (WC) 因其具有硬质金属的特性而被广泛应用，尽管它的用途，例如在轮胎螺柱中，可能会导致纳米级颗粒最终进入自然环境。在这里，我们评估了 WC 纳米颗粒对浮游生物（大型溞）和底栖生物（水生蝽）的潜在长期暴露效应。在底栖系统中，未观察到种群动态或生态系统服务方面的长期影响。然而，对于大型溞的长期暴露，导致首次繁殖的时间增加，如果颗粒被再悬浮，对生存和繁殖输出有强烈的影响。因此，这里显示的急性与长期暴露研究之间的显著差异，强调了如果我们要了解纳米颗粒在自然系统中的影响，需要进行更多的长期研究。
