Study on the pollutant migration interception performance of passive convergence-permeable reactive barrier
ZHENG Kai-xuan1, LI Yi-hao1, LI Fu-li2, CHEN Ping3, OU Jie-yong1, LEI Lei1, CHEN Yan-zhi1, WANG Wei1, DING Jie1, PENG Xiang-qin1, LIU Na2, WEN Yong1, LIU Xiao-wen1, WANG Hong-tao4
1. State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Science, Ministry of Ecological Environment, Guangzhou 510655, China; 2. College of Life Science and Technology, Jinan University, Guangzhou 510632, China; 3. School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China; 4. School of Environment, Tsinghua University, Beijing 100084, China
Abstract：Passive convergence-permeable reactive barrier (PC-PRB) is an eco-friendly and sustainable in-situ groundwater remediation technology. Based on mathematical models of groundwater flow and contaminant transport, this study innovatively proposed a grid self-adaptive refinement algorithm and developed a contaminant convection-diffusion numerical simulation software PRB-Trans. Utilizing PRB-Trans, the impact of the decompression convergence process on the contaminant capture performance of PC-PRB was analyzed. Under given simulation contaminant source conditions, compared with the continuous permeable reactive barrier (C-PRB), the required PRB length (LPRB) and PRB height (HPRB) of PC-PRB were reduced by 40.0% and 70.0%, respectively. The PC-PRB's planar and cross-sectional contaminant treatment efficiencies were increased by 102.9% and 348.3%, respectively. The results of the investigation of influencing factors show that with the increase of the drainage pipe length (Lp), the required LPRB and HPRB of PC-PRB decreased, but the reduction rate gradually decreased. Simultaneously, the PRB thickness (HPRB) increased significantly, leading to an increase in the PRB filler volume. To avoid this situation, it is recommended that the Lp/LPRB ratio is less than 2.In addition, due to the mixing and matching function of the decompression convergence wells and the uniform water distribution function of the buffer layer, PC-PRB can effectively solve the problems of low filler utilization rate and local breakthrough of C-PRB, demonstrating its application potential in the field of groundwater remediation.
郑凯旋, 李义豪, 李富丽, 陈平, 区杰泳, 雷蕾, 陈岩贽, 王炜, 丁洁, 彭香琴, 刘娜, 温勇, 刘晓文, 王洪涛. 减压汇流式PRB污染物迁移阻控性能研究[J]. 中国环境科学, 2025, 45(2): 829-840.
ZHENG Kai-xuan, LI Yi-hao, LI Fu-li, CHEN Ping, OU Jie-yong, LEI Lei, CHEN Yan-zhi, WANG Wei, DING Jie, PENG Xiang-qin, LIU Na, WEN Yong, LIU Xiao-wen, WANG Hong-tao. Study on the pollutant migration interception performance of passive convergence-permeable reactive barrier. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(2): 829-840.
[1] 严芳敏,郭明帅,王 菲.炭铁材料修复三氯乙烯污染地下水的性能 [J]. 中国环境科学, 2024,44(2):825-831.Fan F M, Guo M S, Wang F. The performance of biochar/nZVI composite in remediating trichloroethylene contaminated groundwater [J]. China Environmental Science, 2024,44(2):825-831. [2] 陈睿鑫,姜美洋,王 菲.炭铁可渗透反应墙修复氯代烃及淤堵性能研究 [J]. 中国环境科学, 2024,44(2):825-831.Chen R X, Jiang M Y, Wang F. The remediation and clogging performance of chlorinated hydrocarbons treated by biochar-iron permeable reactive barrier [J]. China Environmental Science, 2023, 43(9):4578-4584. [3] 杨茸茸,周 军,吴 雷,等.可渗透反应墙技术中反应介质的研究进展 [J]. 中国环境科学, 2021,41(10):4579-4587.Yang R R, Zhou J, Wu L, et al. Research progress of reaction mediums in permeable reaction barrier technology [J]. China Environmental Science, 2021,41(10):4579-4587. [4] Gibert O, Assal A, Devlin H, et al. Performance of a field-scale biological permeable reactive barrier for in-situ remediation of nitrate-contaminated groundwater [J]. Science of The Total Environment, 2019,659:211-220. [5] Jiang Y, Xi B, Li R, et al. Advances in Fe(III) bioreduction and its application prospect for groundwater remediation: A review [J]. Frontiers of Environmental Science & Engineering, 2019,13(6):89. [6] 郑凯旋,黄俊龙,罗兴申,等.数值模拟在可渗透反应墙设计中的应用研究进展 [J]. 环境工程, 2022,40(6):22-30.Zheng K X, Huang J L, Luo X S, et al. Application progress of numerical simulation in permeable reaction barrier engineering design [J]. Environmental Engineering, 2022,40(6):22-30. [7] Falciglia P P, Gagliano E, Brancato V, et al. Microwave based regenerating permeable reactive barriers (MW-PRBs): Proof of concept and application for Cs removal [J]. Chemosphere, 2020,251: 126582. [8] 钱 程,张卫民.PRB反应介质材料在地下水污染修复中的应用研究进展 [J]. 环境工程, 2018,36(6):1-5.Qian C, Zhang W M. Progress of application of PRB reaction medium materials in remediation of contaminated groundwater [J]. Environmental Engineering, 2018,36(6):1-5. [9] Bekele D N, Du J, de Freitas L G, et al. Actively facilitated permeable reactive barrier for remediation of TCE from a low permeability aquifer: Field application [J]. Journal of Hydrology, 2019,572:592-602. [10] Obiri-Nyarko F, Grajales-Mesa S J, Malina G. An overview of permeable reactive barriers for in situ sustainable groundwater remediation [J]. Chemosphere, 2014,111:243-259. [11] Thakur A K, Vithanage M, Das D B, et al. A review on design, material selection, mechanism, and modelling of permeable reactive barrier for community-scale groundwater treatment [J]. Environmental Technology & Innovation, 2020,19:100917. [12] Higgins M, Olson T. Life-cycle case study comparison of permeable reactive barrier versus pump-and-treat remediation [J]. Environmental science & technology, 2009,43:9432-9438. [13] Bortone I, Chianese S, Erto A, et al. An optimized configuration of adsorptive wells for the remediation of an aquifer contaminated by multiple aromatic hydrocarbon pollutants [J]. Science of The Total Environment, 2019,696:133731. [14] Torregrosa M, Schwarz A, Nancucheo I, et al. Evaluation of the bio-protection mechanism in diffusive exchange permeable reactive barriers for the treatment of acid mine drainage [J]. Science of The Total Environment, 2019,655:374-383. [15] Santonastaso G, Bortone I, Chianese S, et al. Application of a discontinuous permeable adsorptive barrier for aquifer remediation. A comparison with a continuous adsorptive barrier [J]. Desalination and Water Treatment, 2015:1-10. [16] 刁文钦,宋 健,王 琳,等.利用生物渗透性反应墙修复地下水Cr(VI) 污染的数值模拟 [J]. 中国环境科学, 2022,42(7):3234-3243.Diao W Q, Song J, Wang L, et al. Numerical simulation of groundwater remediation of hexavalent chromium contaminated site by the bio-permeable reactive barrier [J]. China Environmental Science, 2022,42(7):3234-3243. [17] Bortone I, Di Nardo A, Di Natale M, et al. Remediation of an aquifer polluted with dissolved tetrachloroethylene by an array of wells filled with activated carbon [J]. Journal of Hazardous Materials, 2013,260: 914-920. [18] Liu S, Xingang L, Wang H. Hydraulics analysis for groundwater flow through permeable reactive barriers [J]. Environmental Modeling & Assessment, 2011,16:591-598. [19] 罗兴申,郑凯旋,许芳铭,等.数值模拟减压集流式可渗透反应墙技术修复地下水 [J]. 中国环境科学, 2021,41(12):5728-5735.Luo X S, Zheng K X, Xu F M, et al. Numerical simulation for remediation of polluted ground water by a novel convergent flow permeable reactive barrier [J]. China Environmental Science, 2021, 41(12):5728-5735. [20] Painter B D. Optimisation of permeable reactive barrier systems for the remediation of contaminated groundwater [D]. Lincoln: Lincoln University, 2005. [21] Zhan L, Zhao L, Wu L, et al. A passive sink-zeolite permeable reactive barrier to control NH4+-N pollution plume within groundwater: Conceptual design and numerical modeling [J]. Chemosphere, 2023,334:138965.
