为了表征LNAPL和DNAPL在地下水表波动条件下的共同运输,LNAPL和DNAPL在地下水表波动条件下的共同运输
Shengyu Wu1, Zhongran Wu1, Guofeng Li1
1State Key Laboratory for Ecological Security of Regions and Cities, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, Fujian 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Journal of environmental sciences (China)
|November 2, 2025
概括
地下水平面的波动对共存的污染物运输有重大影响,幅度是关键. 动态条件可以增加下行污染物迁移和挥发风险.
科学领域:
- 环境科学 环境科学
- 水文地质学 水文地质学
- 地质化学 地质化学
背景情况:
- 了解动态地下水中的污染物运输至关重要.
- 有限的研究存在于同时存在的轻非水相液体 (LNAPLs) 和密集非水相液体 (DNAPLs) 的同时运输.
研究的目的:
- 在波动的地下水条件下调查 (LNAPL) 和二甲 (DNAPL) 的同时运输.
- 评估地下水平面动态对污染物迁移和相互作用的影响.
主要方法:
- 进行了模拟受控水表波动的柱体实验.
- 在静态和动态条件下分析了多和二甲的运输.
主要成果:
- 这两种污染物都积聚在静态水表附近,二甲的降解速度更快.
- 地下水的波动加剧了下降的污染物运输,增加了挥发和流动.
- 污染物相互作用 (吸附,溶解,粘度) 改变了个体的运输行为.
- 水平面波动幅度是影响下行运输风险的最重要因素.
结论:
- 地下水的动态极大地影响着共存的LNAPL和DNAPL的命运和运输.
- 波动可以通过促进更深层次的迁移和挥发来加剧污染风险.
- 污染物相互作用使运输预测变得复杂,需要进行特定地点的评估.
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