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DOI	10.5194/hess-22-1001-2018
	Effects of microarrangement of solid particles on PCE migration and its remediation in porous media
	Wu M.; Wu J.; Wu J.; Hu B.X.
发表日期	2018
ISSN	1027-5606
起始页码	1001
结束页码	1015
卷号	22 期号:2
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).
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
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160129
作者单位	Wu, M., Key Laboratory of Surficial Geochemistry, Ministry of Education, Department of Hydrosciences, School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210023, China, Institute of Groundwater and Earth Sciences, Jinan University, Guangzhou, 510632, China; Wu, J., Key Laboratory of Surficial Geochemistry, Ministry of Education, Department of Hydrosciences, School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210023, China; Wu, J., Key Laboratory of Surficial Geochemistry, Ministry of Education, Department of Hydrosciences, School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210023, China; Hu, B.X., Institute of Groundwater and Earth Sciences, Jinan University, Guangzhou, 510632, China
推荐引用方式 GB/T 7714	Wu M.,Wu J.,Wu J.,et al. Effects of microarrangement of solid particles on PCE migration and its remediation in porous media[J],2018,22(2).
APA	Wu M.,Wu J.,Wu J.,&Hu B.X..(2018).Effects of microarrangement of solid particles on PCE migration and its remediation in porous media.Hydrology and Earth System Sciences,22(2).
MLA	Wu M.,et al."Effects of microarrangement of solid particles on PCE migration and its remediation in porous media".Hydrology and Earth System Sciences 22.2(2018).