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首页> 外文期刊>International Journal of Environmental Research and Public Health >Environmental Geochemistry of Cerium: Applications and Toxicology of Cerium Oxide Nanoparticles
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Environmental Geochemistry of Cerium: Applications and Toxicology of Cerium Oxide Nanoparticles

机译：铈的环境地球化学：氧化铈纳米颗粒的应用和毒理学

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Cerium is the most abundant of rare-earth metals found in the Earth’s crust. Several Ce-carbonate, -phosphate, -silicate, and -(hydr)oxide minerals have been historically mined and processed for pharmaceutical uses and industrial applications. Of all Ce minerals, cerium dioxide has received much attention in the global nanotechnology market due to their useful applications for catalysts, fuel cells, and fuel additives. A recent mass flow modeling study predicted that a major source of CeO2 nanoparticles from industrial processing plants (e.g., electronics and optics manufactures) is likely to reach the terrestrial environment such as landfills and soils. The environmental fate of CeO2 nanoparticles is highly dependent on its physcochemical properties in low temperature geochemical environment. Though there are needs in improving the analytical method in detecting/quantifying CeO2 nanoparticles in different environmental media, it is clear that aquatic and terrestrial organisms have been exposed to CeO2 NPs, potentially yielding in negative impact on human and ecosystem health. Interestingly, there has been contradicting reports about the toxicological effects of CeO2 nanoparticles, acting as either an antioxidant or reactive oxygen species production-inducing agent). This poses a challenge in future regulations for the CeO2 nanoparticle application and the risk assessment in the environment.
机译：铈是在地壳中发现的最丰富的稀土金属。历史上已经开采和加工了几种碳酸铈，-磷酸盐，-硅酸盐和-（氢）氧化物矿物，用于制药和工业应用。在所有Ce矿物中，由于其在催化剂，燃料电池和燃料添加剂中的有用应用，二氧化铈在全球纳米技术市场上受到了广泛关注。最近的质量流模型研究预测，来自工业加工厂（例如，电子和光学制造商）的CeO2纳米颗粒的主要来源可能会到达陆地环境，例如垃圾填埋场和土壤。 CeO2纳米颗粒的环境命运在很大程度上取决于其在低温地球化学环境中的物理化学性质。尽管需要改进在不同环境介质中检测/定量CeO2纳米颗粒的分析方法，但很明显，水生和陆地生物已暴露于CeO2 NP中，可能对人类和生态系统健康产生负面影响。有趣的是，关于作为抗氧化剂或活性氧产生剂的CeO2纳米颗粒的毒理学作用的报道相互矛盾。这在未来的CeO2纳米颗粒应用法规和环境风险评估中提出了挑战。

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