海平面上升和富含的土壤:有毒关系
Fatemeh Izaditame1, Joshua J LeMonte2, Matthew G Siebecker3
1Department of Sustainable Earth Systems Sciences, University of Texas at Dallas, Richardson, TX 75080, USA.
Journal of hazardous materials
|May 11, 2024
概括
海平面上升可能会增加沿海饮用水井的释放. 由于海平面上升而加剧的降温和盐水条件,含量超过了安全的EPA限制,对数百万人构成风险.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 水文学的水文学
背景情况:
- 美国饮用水井中的 (As) 污染影响了数百万人.
- 海平面上升 (SLR) 可能会破坏土壤捕获的能力.
- 工业活动的沿海地区容易受到SLR对的影响.
研究的目的:
- 调查由于SLR在德州威尔明顿的的空间分布,物种化和释放.
- 评估预计到2100年1米SLR对沿海污染的影响.
- 了解影响移动性的生物地球化学和水文变化.
主要方法:
- 使用X射线吸收光谱 (批量和微量) 进行物种化.
- 评估了水文模式,并进行了宏观动流体实验.
- 模拟河水和海水淹没场景,以研究释放.
主要成果:
- 减少和盐水条件显著增加的释放.
- 离子竞争和含的Fe/Mn氧化物溶解是关键机制.
- 在所有情景中,释放的度都超过了EPA饮用水值.
结论:
- 盐度和氧化还原条件的SLR诱导的变化增加了沿海环境中的释放.
- 这些发现对于在受影响的沿海地区制定管理策略至关重要.
- 这项研究强调,迫切需要解决气候变化加剧的污染风险.
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