中国环境科学

作者：郑凯旋, 陶诗阳, 丁洁, 陈涤, 谭旖琦, 雷蕾, 陈岩贽, 王炜, 温勇, 彭香琴, 王洪涛

单位：1. 生态环境部华南环境科学研究所, 国家环境保护环境污染健康风险评价重点实验室, 广东 广州 510655;2. 清华大学环境学院, 北京 100084

关键词：渗透性反应墙,减压汇流,水力捕集,渗流调控,敏感性分析

基金：国家重点研发计划项目(2018YFC1802300)、中央级公益性科研院所基本科研业务专项(PM-zx703-202406-192)

Passive convergence-permeable reactive barrier (PC-PRB) is a novel and sustainable in-situ remediation technology for contaminated groundwater. To evaluate the hydraulic capture performance of PC-PRB and reveal its seepage regulation mechanism, we developed a PRB-Flow simulation software with high accuracy of particle tracing algorithm and strong numerical solution stability. Under the specified simulation conditions, the PC-PRB exhibited an approximately 47% increase in planar capture flow rate and a 90% increase in sectional capture flow rate compared to the continuous permeable reactive barrier (C-PRB). Sensitivity analysis showed that the water pipe length Lp, the horizontal range of the passive well TDw and the passive well depth Hw were the key parameters affecting the hydraulic performance of PC-PRB. There was a significant positive correlation between Lp and the hydraulic capture performance of PC-PRB (P<0.01). Increasing TDw and Hw can enhance the hydraulic capture capacity of PC-PRB, but the influence degree was not as significant as Lp. The drainage and depressurization effect of the water pipe makes the head drop in the passive well, which drives the surrounding groundwater to converge into the well, thus significantly improving the hydraulic capture performance of PC-PRB. PC-PRB can effectively solve the local breakthrough problem of C-PRB caused by uneven flow velocity.

来源：2024年第11期

《中国环境科学》期刊编辑部

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