DOI: 10.5194/hess-22-1001-2018
Scopus记录号: 2-s2.0-85041484518
论文题名: Effects of microarrangement of solid particles on PCE migration and its remediation in porous media
作者: Wu M ; , Wu J ; , Wu J ; , Hu B ; X
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2018
卷: 22, 期: 2 起始页码: 1001
结束页码: 1015
语种: 英语
Scopus关键词: Aquifers
; Contamination
; Granular materials
; Groundwater
; Groundwater resources
; Hydrogeology
; Mechanical permeability
; Microstructure
; Pollution
; Porous materials
; Tanks (containers)
; Contaminant migration
; Groundwater contamination
; Mathematical expressions
; Perchloroethylene
; Remediation efficiency
; Sequential Gaussian simulation
; Subsurface contamination
; Underground storage tanks
; Groundwater pollution
; aquifer
; cleanup
; granular medium
; groundwater pollution
; heterogeneity
; microstructure
; permeability
; pollutant transport
; porous medium
; tetrachloroethylene
; underground storage
; Granula
英文摘要: Groundwater can be stored abundantly in granula-composed aquifers with high permeability. The microstructure of granular materials has important effect on the permeability of aquifers and the contaminant migration and remediation in aquifers is also influenced by the characteristics of porous media. In this study, two different microscale arrangements of sand particles are compared to reveal the effects of microstructure on the contaminant migration and remediation. With the help of fractal theory, the mathematical expressions of permeability and entry pressure are conducted to delineate granular materials with regular triangle arrangement (RTA) and square pitch arrangement (SPA) at microscale. Using a sequential Gaussian simulation (SGS) method, a synthetic heterogeneous site contaminated by perchloroethylene (PCE) is then used to investigate the migration and remediation affected by the two different microscale arrangements. PCE is released from an underground storage tank into the aquifer and the surfactant is used to clean up the subsurface contamination. Results suggest that RTA can not only cause more groundwater contamination, but also make remediation become more difficult. The PCE remediation efficiency of 60.01 99.78 % with a mean of 92.52 and 65.53 99.74 % with a mean of 95.83 % is achieved for 200 individual heterogeneous realizations based on the RTA and SPA, respectively, indicating that the cleanup of PCE in aquifer with SPA is significantly easier. This study leads to a new understanding of the microstructures of porous media and demonstrates how microscale arrangements control contaminant migration in aquifers, which is helpful to design successful remediation scheme for underground storage tank spill. © 2018 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79406
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Surficial Geochemistry, Ministry of Education, Department of Hydrosciences, School of Earth Sciences and Engineering, Nanjing University, Nanjing, China; Institute of Groundwater and Earth Sciences, Jinan University, Guangzhou, China
Recommended Citation:
Wu M,, Wu J,, Wu J,et al. Effects of microarrangement of solid particles on PCE migration and its remediation in porous media[J]. Hydrology and Earth System Sciences,2018-01-01,22(2)