The use of metal and metal oxide nanomaterials (NMs) is experiencing a significant surge in popularity due to their distinctive structures and properties, making them highly attractive for a wide range of applications. This increases the risks of their potential negative impact on organisms if dispersed into the environment. Information about their behavior and transformation upon environmental interactions in aquatic settings is limited. In this study, the influence of naturally excreted biomolecules from the zooplankton Daphnia magna on nanosized Y₂O₃ of different concentrations was systematically examined in synthetic freshwater in terms of adsorption and eco-corona formation, colloidal stability, transformation, dissolution, and ecotoxicity towards D. magna. The formation of an eco-corona on the surface of the Y₂O₃ NMs leads to improved colloidal stability and a reduced extent of dissolution. Exposure to the Y₂O₃ NMs lowered the survival probability of D. magna considerably. The ecotoxic potency was slightly reduced by the formation of the eco-corona, though shown to be particle concentration-specific. Overall, the results highlight the importance of systematic mechanistic and fundamental studies of factors that can affect the environmental fate and ecotoxic potency of NMs.

金属和金属氧化物纳米材料（NM）因其独特的结构和性能而受到广泛欢迎，使其对广泛的应用极具吸引力。如果它们扩散到环境中，这会增加对生物体潜在负面影响的风险。关于它们在水生环境中的行为和环境相互作用的转变的信息是有限的。本研究系统地研究了浮游动物大型溞自然分泌的生物分子对合成淡水中不同浓度的纳米Y ₂ O ₃的吸附和生态冠形成、胶体稳定性、转化、溶解和生态毒性的影响。 D.麦格纳。_{Y 2} O ₃ NM表面上生态电晕的形成提高了胶体稳定性并降低了溶解程度。暴露于 Y ₂ O _{3 NM 显着降低了}D. magna的存活概率。生态毒力因生态电晕的形成而略有降低，尽管显示出与颗粒浓度相关。总体而言，结果强调了对影响 NM 的环境命运和生态毒性效力的因素进行系统机制和基础研究的重要性。