对重金属污染物的二维运输研究在切断壁-水库系统中,考虑了巩固行为和兰格穆尔吸附特征
Chen Feng1,2, Wenhao Jiang3,4, Hao Wang5
1School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan, 430023, China.
Scientific reports
|November 25, 2025
概括
巩固行为通过减少孔隙性来提高隔离墙对重金属污染物 (HMP) 的性能. 这项研究模拟了HMP运输,表明整合增强了阻塞,并为墙壁设计提供了基础.
科学领域:
- 地质技术工程 地质技术工程
- 环境工程 环境工程
- 水文地质学 水文地质学
背景情况:
- 隔离墙对于含有重金属污染物 (HMPs) 来说至关重要.
- 它们的长期有效性取决于巩固行为,这改变了孔隙性和污染物运输.
- 以前的模型往往忽略了整合效应和复杂的吸附过程.
研究的目的:
- 开发一种新的2D运输模型,用于切断壁-水库系统中的HMP.
- 首次结合了整合行为和兰格穆尔吸附.
- 为了更现实地评估隔离墙的性能和设计.
主要方法:
- 开发了一个二维污染物运输模型.
- 综合整合诱导的孔径变化和兰木尔吸附.
- 在数值解决方案中使用有限差异法.
- 通过三个比较分析验证了模型.
主要成果:
- 巩固通过减少由于有效应力而导致的孔隙性,显著提高了切断壁的防性能.
- 兰木尔吸附模型预测HMP度比线性模型高,度较高时差异会增加.
- 增加了剪强度减小因子 (0.1到0.7) 将突破时间从88.6年减少到71.4年.
结论:
- 考虑整合行为对于准确评估与HMP相比的切断壁性能至关重要.
- 开发的模型为评估污染物阻断和设计切断墙提供了更现实的基础.
- 该研究提供了一种简化的方法来确定最佳的切断壁厚度.
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