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Effects of LaCoO3 perovskite nanoparticle on Daphnia magna: accumulation, distribution and biomarker responses

机译：LACOO3 PEROVSKITE纳米粒子对Daphnia MAGNA的影响：积累，分布和生物标志物反应

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Perovskite nanomaterials (PNMs) have been shown to be promising materials for the effective replacement of conventional energy source materials. With the increasing use of PNMs, they will inevitably enter aquatic environments, giving rise to concerns regarding the environmental impact of PNMs. To fill up the gap in information about the environmental effect of PNMs, Daphnia magna was exposed to a typical PNM LaCoO3 for 48 h, to assess temporal patterns in PNM bioaccumulation and distribution. Synchrotron radiation based micro X-ray fluorescence spectroscopy (mu-XRF) was used to investigate the time dependent spatial distribution of LaCoO3. Reactive oxygen species (ROS), superoxide dismutase (SOD) and Na+/K+-adenosine triphosphatase (ATPase) were measured as key biomarkers. The results showed that oxidative stress was observed at both LaCoO3 concentrations and Na+/K+-ATPase was inhibited by high levels of LaCoO3. The mode of action of LaCoO3 was mainly dependent on the metal forms. At low LaCoO3 levels, food ingestion was the main entry pathway into organisms and LaCoO3 nanoparticle aggregates accumulated in the gut area. At high LaCoO3 levels, both waterborne and dietary uptake was observed and the gut and thoracic limbs were the main target sites for LaCoO3 nanoparticle aggregates and dissolved ions, respectively. LaCoO3 was not found to translocate in daphnids during the 48 h exposure period at either concentration, suggesting that internalization did not occur. These findings help further our understanding of the fate of PNMs in aquatic organisms, as well as the associated biological responses to PNM exposure.
机译：已经显示钙钛矿纳米材料（PNMS）是有效更换常规能源材料的有希望的材料。随着PNMS的使用越来越多，它们将不可避免地进入水生环境，从而引起对PNMS的环境影响的担忧。为了填补有关PNMS环境效果的信息的差距，将Daphnia MAGNA暴露于典型的PNM LACOO3持续48小时，以评估PNM生物累积和分布中的时间模式。基于同步辐射辐射的微X射线荧光光谱（MU-XRF）用于研究LACOO3的时间依赖性空间分布。测量反应性氧物质（ROS），超氧化物歧化酶（SOD）和Na + / k + -deneNOIS三磷酸酶（ATP酶）作为关键生物标志物。结果表明，在LACOO3浓度下观察到氧化应激，并通过高水平的LACOO3抑制Na + / K + -ATP酶。 LACOO3的作用方式主要取决于金属形式。在低lacoo3水平下，食物摄取是进入生物的主要进入途径，并且在肠道中积聚的LACOO3纳米粒子聚集体。在高lacoo3水平下，观察到水性和膳食摄取，肠道和胸部四肢是Lacoo3纳米颗粒聚集和溶解离子的主要靶位点。在任何浓度的48小时暴露期间未发现LACOO3在Daphnids中译中，表明没有发生内化。这些发现有助于进一步了解水生生物中PNMS的命运，以及对PNM暴露的相关生物反应。

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    《RSC Advances》 |2019年第42期|共10页
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  • 正文语种 eng
  • 中图分类 化学;
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