对采矿区地下水中Sb调动机制的新见解:一个合物实地研究
Xiaocen Jia1, Juraj Majzlan2, Liyuan Ma1
1School of Environmental Studies, China University of Geosciences, 430078 Wuhan, PR China.
Journal of hazardous materials
|August 14, 2023
概括
合物显著影响污染的地下水中的 (Sb) 流动性,与有机物结合并随着氧化还原条件的变化而变化. 了解这些体相互作用是有效的金属化物污染补救的关键.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 水文地质学 水文地质学
背景情况:
- 体在地化学循环中至关重要,但它们在污染地下水中的 (Sb) 命运中的作用仍然不清楚.
- 了解Sb合物相互作用对于评估地下水污染和制定补救策略至关重要.
研究的目的:
- 研究合物对污染地下水中的反流动性和物种化的影响.
- 为了确定控制Sb行为和它们与有机物质的关联的类型的合物.
主要方法:
- 来自Sb矿井含水层的地下水样本使用连续超 (0.45μm,100kDa,50kDa,5kDa) 进行了分离.
- 分析了合体分数中的反的度.
- 用3D光光谱和X射线吸收光谱的并行因子分析来描述合物和Sb复合.
- 进行了相关性分析,以评估Sb,合物,和氧化还原参数之间的关系.
主要成果:
- 体 (0.45μm - 5kDa) 携带0.184.1%的Sb,其度高达2973μg/L.
- 在这两个含水层中,Sb与有机合物 (类似蛋白质和类似湿土的物质) 有着强烈的联系.
- 与和氧化还原条件 (ORP,DO) 的竞争性吸附影响了Sb-合体的复合和移动性.
- 增加的氧化还原潜力和溶解氧导致合体Sb的减少.
结论:
- 有机体,特别是类似蛋白质和类似湿土的物质,是污染地下水中Sb命运的主要驱动因素.
- 的移动性受到体运输,有机物复合,与的竞争性吸附和氧化还原条件的显著控制.
- 这些发现为地下水系统中有效的Sb和金属化物污染补救提供了理论基础.
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