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在被洪水淹没的金矿田中存在潜在的有毒元素:堆肥稳定了Cd,生物炭和便动员了As和Pb

Albert Kobina Mensah¹, Ephraim Sekyi-Annan¹, Sadick Adams²

¹CSIR-Soil Research Institute, Private Mail Bag, Academy Post Office, Kwadaso-Kumasi, Ghana; Department of Soil Resources Management, CSIR College of Science and Technology (CCST), Kumasi, Ghana.

Journal of hazardous materials

|September 11, 2025

概括

堆肥通过改变土壤化学物质,有效地减轻被洪水淹没的土壤中的 (Cd),而生物炭和便增加了 (As) 和 (Pb) 的流动性. 近红外光谱学有助于预测受污染的采矿场所的As水平.

科学领域:

环境科学环境科学
土壤科学土壤科学
地质化学地质化学

背景情况:

洪水淹没的采矿场所由于移动的潜在有毒元素 (PTEs) 造成风险.
探索土壤修改,以减轻PTE在无氧条件下的流动性.

研究的目的:

调查土壤修改对减轻洪水污染土壤中PTE流动性的有效性.
评估近红外光谱 (NIRS) 在分析土壤变化和预测PTE方面的作用.

主要方法:

化实验通过洪水模拟无氧条件.
对PTE度和土壤生物地质化学进行实验室分析.
接近红外光谱 (NIRS) 用于定性分析和预测建模 (部分最小平方).

主要成果:

堆肥显著减少了43%的 (Cd),这与高的Fe/Cd比率和改善的吸收有关.
(As) 和 (Pb) 的含量大幅增加,特别是在生物炭和肥修正案中.
近红外光谱 (NIRS) 成功预测了As的度 (R2cv = 0.802).

结论:

堆肥是一种有效的改善剂,可以在被洪水淹没的土壤中稳定Cd.
玉米生物炭和大米生物炭,以及肥,可以增强As和Pb的释放.
土壤pH值,氧化还原潜力和 (Mn) 是洪水期间PTE动员的关键因素.

关键词:

工业黄金开采的黄金开采方式污染污染污染污染洪水淹没了矿场的矿场.在PTE的动员行动中.整治整治整治整治

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