在紧的粘土中浸出物运输的时空动态:通过多相接口介导的动态滑动和微生物继承的结合效应
Yunchao Qi1, Wei Zhang2, Benyi Cao3
1Institute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing, 210096, China.
Environmental pollution (Barking, Essex : 1987)
|August 7, 2025
概括
垃圾填埋场的粘土层可以防止危险的液泄漏. 微生物活动和孔隙变化显著影响污染物流动,影响屏障完整性和长期制有效性.
科学领域:
- 环境科学 环境科学
- 地质技术工程 地质技术工程
- 微生物学 微生物学
背景情况:
- 垃圾填埋场的液含有危险的重金属和污染物,对土壤和地下水构成风险.
- 压缩粘土层 (CCLs) 对于垃圾填埋的控制至关重要,需要了解液的迁移.
- 评估污染物扩散并确保长期制取决于阐明CCL中的液运动.
研究的目的:
- 为了研究在压缩的粘土内的浸出物迁移机制.
- 开发一种新型的模拟框架,用于受微尺度因素影响的液透.
- 量化微生物继承,孔隙结构和界面动态对污染物运输的结合效应.
主要方法:
- 侵入孔径测量用于描述微纳米孔隙结构.
- 一个新的建模框架,集成微尺度力学和孔隙异质性.
- 分析微生物继承,界面动态和漏行为.
主要成果:
- 微生物的继承驱动了四个不同的阶段的浸出液流动振荡.
- 孔隙扩大使流量振荡幅度放大了149.69%.
- 滑动效应使流速增加了2.51倍,过渡流动模式.
- 多相接口合将波量放大691倍,孔隙扩大.
结论:
- 微生物继承是CCL中液流量变化的主要驱动因素.
- 滑动效应和孔隙扩大显著改变透动态和污染物运输.
- 开发的框架提供了对垃圾填埋场屏障耐用性和多尺度漏模型的洞察力.
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