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Study on the pollutant migration interception performance of passive convergence-permeable reactive barrier
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Kai-xuan ZHENG1, Yi-hao LI1, Fu-li LI2, Ping CHEN3, Jie-yong OU1, Lei LEI1, Yan-zhi CHEN1, Wei WANG1, Jie DING1, *, Xiang-qin PENG1, **, Na LIU2, Yong WEN1, Xiao-wen LIU1, Hong-tao WANG4
China Environmental Science | 2025, 45(2) : 829 - 840
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China Environmental Science | 2025, 45(2): 829-840
• Water Pollution Control •
Study on the pollutant migration interception performance of passive convergence-permeable reactive barrier
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Kai-xuan ZHENG1, Yi-hao LI1, Fu-li LI2, Ping CHEN3, Jie-yong OU1, Lei LEI1, Yan-zhi CHEN1, Wei WANG1, Jie DING1, *, Xiang-qin PENG1, **, Na LIU2, Yong WEN1, Xiao-wen LIU1, Hong-tao WANG4
Affiliations
  • 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
Published: 2025-02-20
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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.

permeable reactive barrier  /  passive convergence  /  pollutant migration interception  /  numerical simulation  /  influencing factors analysis
Kai-xuan ZHENG, Yi-hao LI, Fu-li LI, Ping CHEN, Jie-yong OU, Lei LEI, Yan-zhi CHEN, Wei WANG, Jie DING, Xiang-qin PENG, Na LIU, Yong WEN, Xiao-wen LIU, Hong-tao WANG. Study on the pollutant migration interception performance of passive convergence-permeable reactive barrier[J]. China Environmental Science, 2025 , 45 (2) : 829 -840 .
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Year 2025 volume 45 Issue 2
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Article Info
  • Receive Date：2024-07-10
  • Online Date：2026-03-17
  • Published：2025-02-20
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History
  • Received：2024-07-10
Funding
Affiliations
    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
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表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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