一种使用Enchytraeus crypticus的毒动力学方法,以评估氧酸盐的效率,以修复被稀土元素污染的土壤
Wenxing Li1, Erkai He2, Cornelis A M Van Gestel3
1School of Geographic Sciences, East China Normal University, Shanghai 200241, China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Journal of hazardous materials
|September 10, 2023
概括
氧酸盐有效地修复稀土元素 (REE) 污染的土壤,通过降低REE生物可用性和土壤生物中的积累. 这种化学稳定方法减轻了REE矿山附近农业地区的生态风险.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 毒理学 毒理学 毒理学
背景情况:
- 稀土元素 (REE) 的开采污染了周围的农业土壤.
- 可再生能源对土壤生态系统和陆地生物构成生态风险.
研究的目的:
- 评估酸在修复 REE 污染土壤中的有效性.
- 用毒动力学方法评估Enchytraeus crypticus中REE生物可用性和积累的减少.
主要方法:
- 低和高的REE污染土壤的修复用酸.
- 应用一种毒动力学模型来量化REE吸收,消除和生物积累在Enchytraeus crypticus.
- 对土壤特性 (pH,DOC,离子) 和CaCl2-可提取的REE度的分析.
主要成果:
- 添加氧酸盐增加了土壤的pH,DOC和阳离子含量.
- 可提取的CaCl2REE度显著下降,表明稳定.
- 在Enchytraeus crypticus中,酸降低了REE吸收速率常量 (Ku) 和生物积累因子 (BAF) 的80%以上.
- 轻型REEs在轻微污染的土壤中表现出更高的生物积累潜力.
结论:
- 用酸进行化学稳定,有效地降低了REE在农业土壤中的生物可用性.
- 这种补救策略减轻了矿场附近的REE污染的生态风险.
- 了解REE毒动力学对于评估土壤生物暴露和风险至关重要.
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