土壤中轻稀土元素的生物可访问性:分布和与物种化和土壤性质的关系
Liwen Zhang1, Beibei Wang1, Fei Gao1
1School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
Environmental research
|June 2, 2025
概括
在土壤中轻稀土元素 (LREEs) 的生物可访问性不太清楚. 种类,土壤pH值,和水分显著影响LREEs的潜在健康风险.
科学领域:
- 环境化学环境化学
- 地质化学 地质化学
- 毒理学 毒理学 毒理学
背景情况:
- 轻稀土元素 (LREEs) 的广泛使用引发了健康问题.
- 土壤中LREEs的生物可访问性对于暴露风险评估至关重要,但人们对其了解甚少.
- 了解LREEs在土壤中的行为对于环境和健康安全至关重要.
研究的目的:
- 为了研究不同类型的土壤中 (Sc), (La), (Ce) 和 (Sm) 的生物可访问性.
- 检查LREE生物可访问性,它们的化学物种和土壤特性之间的关系.
- 根据物种和土壤特征开发一个模型来预测LREE生物可访问性.
主要方法:
- 利用体外消化模型来模拟人类的胃肠道状况.
- 在三个不同的土壤类型中分析了LREE度和物种化.
- 使用相关性分析和通用线性混合模型 (GLMM) 来评估关系.
主要成果:
- 主要在剩余部分 (>60%) 中发现LREEs.
- 胃部的生物可访问性在3.7%至11.6%之间,而肠道的生物可访问性则较低 (1.1%至6.4%).
- 肠道生物可访问性与Fe/Mn氧化物结合的特异性正相关,与土壤pH,Ca含量和水分负相关.
结论:
- 与Fe/Mn氧化物结合的特异化,土壤水分,pH和Ca含量是影响LREE生物可访问性的关键因素.
- 基于物种和土壤特性,GLMM有效地预测了LREE的生物可访问性 (R2 = 0.750.88).
- 这些发现改进了对土壤环境中LREEs的暴露风险评估.
相关概念视频
Atomic Emission Spectroscopy: Overview
2.6K
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
2.6K
Key Elements for Plant Nutrition
22.1K
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
22.1K
The Soil Ecosystem
22.1K
Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:
22.1K


