在无毒条件下进行铁化硫化转化和合As (V) 和Cd (II) 调动
Xiaoming Zhao1, Xu Ma2, Yuyin Ma2
1Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China.
Journal of hazardous materials
|March 1, 2025
概括
铁酸盐硫化影响 (As(V)) 和 (Cd(II)) 的流动性. 同时存在的污染物抑制了化的转化,促进了化的形成,减少了矿业影响环境中的污染物释放.
科学领域:
- 环境地质化学环境地质化学
- 矿物学是什么?矿物学是什么?
- 污染物水地化学污染物
背景情况:
- 铁酸盐硫化对于矿业影响地区的 (As(V)) 和 (Cd(II)) 行为至关重要.
- 铁酸盐的矿物演变和合的As (V) -Cd (II) 调动仍然不太清楚.
- 了解这些过程对于评估环境风险和制定补救策略至关重要.
研究的目的:
- 研究硫化过程中的化转化和As (V) -Cd (II) 调动.
- 阐明在矿物转化途径中共存的As(V) 和Cd(II) 的作用.
- 为了确定硫化物度对二次矿物形成和污染物封存的影响.
主要方法:
- 实验性调查含有As(V) -Cd(II) 的铁化物暴露在不同硫化物 (S(-II)) 度 (1和5毫米) 中.
- 使用粉末X射线衍射 (PXRD),高分辨率传输电子显微镜 (HR-TEM) 和X射线吸收光谱 (XAS) 的表征.
- 使用冷扫描传输电子显微镜 (Cs-TEM) 和化学提取,分析二次相形成,污染物纳入和调动.
主要成果:
- 同时存在的As(V) 和Cd(II) 抑制了化的转化为Lepidocrocite和Goethite.
- 较高的As (V) 和Cd (II) 会促进无形的麦克纳岩和岩的形成.
- 二次阶段如勒皮多克罗,格林诺克和皮里特取大量的As{V}和Cd{II},减少它们的调动.
结论:
- 在As (V) -Cd (II) 影响下的硫化途径显著改变了矿物质演变和污染物的命运.
- 在无氧环境中,化石和化石形成有效地固定了As (V) 和Cd (II).
- 研究结果提供了关于地球化学循环的见解,并为污染环境的修复策略提供了基础.
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