Eco-corona-mediated transformation of nano-sized Y2O3 in simulated freshwater: A short-term study

IF 4.7 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES NanoImpact Pub Date : 2024-01-01 DOI:10.1016/j.impact.2023.100490
Alexander Khort , Tingru Chang , Jing Hua , Eva Blomberg , Tommy Cedervall , Inger Odnevall
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Abstract

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.

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生态电晕介导的纳米级 Y2O3 在模拟淡水中的转化:短期研究
金属和金属氧化物纳米材料(NMs)因其独特的结构和性能,使其在广泛的应用中极具吸引力,其使用正经历着大幅的普及。这就增加了它们散布到环境中对生物产生潜在负面影响的风险。有关它们在水生环境中的行为和环境相互作用转化的信息还很有限。本研究在合成淡水中,从吸附和生态电晕的形成、胶体稳定性、转化、溶解以及对大型蚤的生态毒性等方面,系统地考察了大型蚤这种浮游动物自然排泄的生物大分子对不同浓度的纳米级 Y2O3 的影响。Y2O3 NMs 表面生态电晕的形成提高了胶体稳定性,降低了溶解度。暴露于 Y2O3 NMs 会大大降低大型贻贝的存活概率。生态电晕的形成略微降低了生态毒性的效力,但这与颗粒浓度有关。总之,研究结果凸显了对可能影响纳米金属环境归宿和生态毒性的因素进行系统的机理和基础研究的重要性。
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来源期刊
NanoImpact
NanoImpact Social Sciences-Safety Research
CiteScore
11.00
自引率
6.10%
发文量
69
审稿时长
23 days
期刊介绍: NanoImpact is a multidisciplinary journal that focuses on nanosafety research and areas related to the impacts of manufactured nanomaterials on human and environmental systems and the behavior of nanomaterials in these systems.
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