Nielsen Maria Bille, Vavra Janna, Palmqvist Annemette, Forbes Valery E
Department of Environmental Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.
School of Biological Sciences, University of Nebraska-Lincoln, United States.
Aquat Toxicol. 2022 Jan;242:106046. doi: 10.1016/j.aquatox.2021.106046. Epub 2021 Nov 26.
Aquatic sediments are predicted to be an important sink for released silver nanoparticles (AgNPs). Knowing the long-term effects of AgNPs on benthic deposit-feeders is therefore an important step towards assessing their potential environmental risks. The aim of this study was to examine the effects on survival, growth and reproduction of the deposit-feeding polychaete Capitella teleta exposed for ten weeks to sediment-associated un-coated AgNPs or silver nitrate (AgNO). C. teleta exhibited tolerance towards exposure to both AgNPs and AgNO. Significant effects were observed for percentage of pairs that reproduced as well as worm growth after eight weeks, but the effects did not show a clear concentration- or Ag type-dependent pattern. Further investigations of long-term effects of un-coated AgNPs in additional sediment-dwelling organisms are needed and should involve comparisons to coated AgNPs.
预计水生沉积物将成为释放的银纳米颗粒（AgNPs）的重要汇。因此，了解AgNPs对底栖沉积取食者的长期影响是评估其潜在环境风险的重要一步。本研究的目的是检验暴露于与沉积物相关的未包覆AgNPs或硝酸银（AgNO₃）十周的沉积取食多毛纲小头虫（Capitella teleta）的生存、生长和繁殖受到的影响。小头虫对暴露于AgNPs和AgNO₃均表现出耐受性。在八周后观察到繁殖的配对百分比以及蠕虫生长有显著影响，但这些影响并未呈现出明确的浓度或银类型依赖性模式。需要对额外的沉积物栖息生物中未包覆AgNPs的长期影响进行进一步研究，并且应该包括与包覆AgNPs的比较。
