在被采矿活动影响的洪水平原土壤中解脱的生物可用性
Iván Urango-Cárdenas1, German Enamorado-Montes1, Saudith Burgos-Nuñez1
1Department of Chemistry, Faculty of Sciences, University of Cordoba, Montería, Colombia.
The Science of the total environment
|June 24, 2024
概括
金矿开采污染土壤与 (As),特别是在洪水. 降低条件增加了深层土壤中的流动性,对农业和健康构成风险.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 土壤科学 土壤科学
背景情况:
- 黄金开采引入了 (Hg) 和 (As) 污染土壤.
- 采矿活动可以调动有毒物质,特别是在易受洪水袭击的洪水平原环境.
研究的目的:
- 评估采矿影响的洪平地土壤中的总含量,化学物种和生物可用分数.
- 了解洪水和氧化还原条件对的流动性和物种化的影响.
主要方法:
- 来自哥伦比亚拉莫哈纳的207个地表土样本的分析.
- 将土壤样本选到2毫米,并分析总,无机和相关元素 (S,Fe,Mn,Al).
- 在不同的氧化还原条件下评估的物种化和生物利用性.
主要成果:
- 在无机和硫,铁,和等元素之间发现了显著的相关性.
- 在洪水期间与河流运输的悬浮物质相关的毒性.
- 在被洪水淹没的地点减少条件增加了的流动性,特别是,在更深层的土壤层.
- 污染因子 (CF) 从1.3到11.1不等,Igeo从-0.2到2.9,表明中等到高的污染.
结论:
- 洪水和氧化还原条件显著影响矿业影响土壤中的流动性和物种化.
- 用于农业的土壤中含量升高可能会给健康带来潜在风险.
- 了解的地质化学对于管理受污染的采矿区的风险至关重要.
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