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首页> 外文期刊>RSC Advances >Effects of LaCoO3 perovskite nanoparticle on Daphnia magna: accumulation, distribution and biomarker responses
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Effects of LaCoO3 perovskite nanoparticle on Daphnia magna: accumulation, distribution and biomarker responses

机译：LaCoO3钙钛矿纳米颗粒对水蚤的影响：积累，分布和生物标志物的反应。

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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 LaCoO _(3) for 48 h, to assess temporal patterns in PNM bioaccumulation and distribution. Synchrotron radiation based micro X-ray fluorescence spectroscopy (μ-XRF) was used to investigate the time dependent spatial distribution of LaCoO _(3) . 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 LaCoO _(3) concentrations and Na ~(+) /K ~(+) -ATPase was inhibited by high levels of LaCoO _(3) . The mode of action of LaCoO _(3) was mainly dependent on the metal forms. At low LaCoO _(3) levels, food ingestion was the main entry pathway into organisms and LaCoO _(3) nanoparticle aggregates accumulated in the gut area. At high LaCoO _(3) levels, both waterborne and dietary uptake was observed and the gut and thoracic limbs were the main target sites for LaCoO _(3) nanoparticle aggregates and dissolved ions, respectively. LaCoO _(3) 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：钙钛矿纳米材料（PNMs）已被证明是有效替代常规能源材料的有前途的材料。随着PNM的使用越来越多，它们将不可避免地进入水生环境，引起对PNM的环境影响的担忧。为了填补有关PNM的环境影响的信息空白，将大型蚤（Daphnia magna）暴露于典型的PNM LaCoO_（3）48小时，以评估PNM生物积累和分布的时间模式。基于同步辐射的微X射线荧光光谱法（μ-XRF）用于研究LaCoO_（3）随时间的空间分布。活性氧（ROS），超氧化物歧化酶（SOD）和Na〜（+）/ K〜（+）-腺苷三磷酸酶（ATPase）被测量为关键生物标志物。结果表明，在LaCoO _（3）浓度下均观察到氧化应激，高水平的LaCoO _（3）抑制Na〜（+）/ K〜（+）-ATPase。 LaCoO_（3）的作用方式主要取决于金属形式。在低LaCoO _（3）水平下，食物摄入是进入生物体的主要途径，而LaCoO _（3）纳米颗粒聚集体则聚集在肠道区域。在高LaCoO _（3）水平下，可以观察到水和膳食摄入，并且肠道和胸肢分别是LaCoO _（3）纳米颗粒聚集体和溶解离子的主要目标部位。没有发现LaCoO_（3）在48 h暴露期间在任一浓度的水蚤中易位，表明没有发生内在化。这些发现有助于我们进一步了解水生生物中PNM的命运以及对PNM暴露的相关生物学反应。

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