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抽水产生的参数变化对弱透水层中轻质非水相液体迁移的影响：一项分析与实验研究。

Effects of Parameter Variations Generated by Pumping on LNAPL Migration in the Aquitard: An Analytical and Experimental Study.

作者信息

Su Yue, Huang Yong, Shen Huan, Dong Xiaosong, Sun Xiaochang, Fu Zhimin

机构信息

School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, China.

Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, ON N2L 3G1, Canada.

出版信息

Toxics. 2025 Jun 2;13(6):471. doi: 10.3390/toxics13060471.

DOI:10.3390/toxics13060471
PMID:40559944
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12197498/
Abstract

The parameter variations in the aquitard have an important influence on the migration laws of contaminants in the aquitard. In order to study the influence of dynamic changes in parameters during pumping on the migration laws of Light Non-aqueous Phase Liquid (LNAPL) in the aquitard, the one-dimensional consolidation and groundwater flow equations for the aquitard were employed to derive the governing equations for the migration of LNAPL in the aquitard. A self-designed experimental platform was developed to investigate the effects of the pore water pressure, consolidation deformation, and pumping rate on LNAPL migration during pumping. The laboratory experimental results indicated that during pumping, the migration behavior of LNAPL in the aquitard typically exhibited a trend toward the pumping well and the overlying aquifer. The closer to the pumping well, the greater the change in the pore water pressure, the greater the amount of consolidation deformation, the earlier the state of densification, and the slower the migration rate of LNAPL in the aquitard. The nearer to the bottom of the aquitard, the larger the amount of consolidation deformation in the aquitard and the slower the migration rate of LNAPL in the aquitard. Also, the pumping rate had an important influence on groundwater flow movement and contaminant migration. The characteristics of parameter variations in the aquitard and laws of LNAPL migration during pumping were systematically studied and analyzed; these research results can provide a reference for the prediction and remediation of LNAPL in contaminated sites.

摘要

弱透水层中的参数变化对污染物在弱透水层中的运移规律有重要影响。为了研究抽水过程中参数动态变化对轻非水相液体（LNAPL）在弱透水层中运移规律的影响，采用弱透水层的一维固结和地下水流方程推导了LNAPL在弱透水层中运移的控制方程。搭建了自行设计的实验平台，以研究抽水过程中孔隙水压力、固结变形和抽水速率对LNAPL运移的影响。实验室实验结果表明，抽水过程中，LNAPL在弱透水层中的运移行为通常表现出向抽水井和上覆含水层方向的趋势。距离抽水井越近，孔隙水压力变化越大，固结变形量越大，密实化状态越早出现，LNAPL在弱透水层中的运移速率越慢。距离弱透水层底部越近，弱透水层中的固结变形量越大，LNAPL在弱透水层中的运移速率越慢。此外，抽水速率对地下水流运动和污染物运移有重要影响。系统地研究和分析了弱透水层中参数变化特征及抽水过程中LNAPL的运移规律；这些研究结果可为污染场地中LNAPL的预测和修复提供参考。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82f7/12197498/1e856c109e1b/toxics-13-00471-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82f7/12197498/e42367c08f8c/toxics-13-00471-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82f7/12197498/518667da01c1/toxics-13-00471-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82f7/12197498/1e856c109e1b/toxics-13-00471-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82f7/12197498/d7abb7833b0a/toxics-13-00471-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82f7/12197498/23e512463281/toxics-13-00471-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82f7/12197498/ec2ba398aa1a/toxics-13-00471-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82f7/12197498/749dee921b4a/toxics-13-00471-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82f7/12197498/ed51d9259765/toxics-13-00471-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82f7/12197498/e42367c08f8c/toxics-13-00471-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82f7/12197498/518667da01c1/toxics-13-00471-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82f7/12197498/1e856c109e1b/toxics-13-00471-g008.jpg

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本文引用的文献

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2
LNAPL migration processes based on time-lapse electrical resistivity tomography.基于时移电阻率层析成像的 LNAPL 运移过程。
J Contam Hydrol. 2023 Nov;259:104260. doi: 10.1016/j.jconhyd.2023.104260. Epub 2023 Oct 30.
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The Migration Mechanism of BTEX in Single- and Double-Lithology Soil Columns under Groundwater Table Fluctuation.
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Toxics. 2023 Jul 20;11(7):630. doi: 10.3390/toxics11070630.
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Migration behaviour of LNAPL in fractures filled with porous media: Laboratory experiments and numerical simulations.多孔介质中裂隙内 LNAPL 的运移行为：实验室实验与数值模拟。
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