低渗透介质中轻非水相流体迁移转化规律

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Abstract The LNAPL longitudinal migration transformation model was established by COMSOL software, and was solved with the finite element method. It was applied to predict the distribution of pollutants, meanwhile parameter sensitivity was performed with local analysis method. The research results showed that most of the LNAPL aggregated above the water surface and formed a high mass distribution peak area, and a small part overcame the capillary pressure and migrated downward. In the free phase migration range, the dissolved phase concentration reached or approached the saturated solubility. When the top pollution source disappeared, the precipitation gradually lowered the maximum saturation and the depth of its concentration occurrence. The local low permeability lens in the porous medium caused of the pollutants blocked which will be accumulated on its surface and formed a pollution pool. The sensitivity analysis results demonstrated that the permeability coefficient was a key parameter to control the longitudinal migration speed and saturation distribution of LNAPL.

Key words： porous media light non-aqueous phase fluid multiphase flow numerical simulation parameter sensitivity analysis

Received: 25 August 2020

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X523

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	Articles by authors
	RUAN Dong-mei
	BIAN Jian-min
	WANG Qian
	WU Juan-juan
	WANG Yu
	SUN Xiao-qin

Cite this article:

RUAN Dong-mei,BIAN Jian-min,WANG Qian等. The migration and transformation of light non-aqueous fluid in silty clay[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(4): 1815-1823.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I4/1815

[1]	王涵,卢文喜,李久辉,等.地下水DNAPLs污染多相流的随机模拟及其不确定性分析[J]. 中国环境科学, 2018,38(7):2572-2579. Wang Han, Lu Wen-xi, Li Jiu-hui, et al. Stochastic simulation and uncertainty analysis of multi-phase flow of groundwater polluted by DNAPLs[J]. China Environmental Science, 2018,38(7):2572-2579.
[2]	朱振慧,高宗军,张晓海,等.轻质非水相流体(柴油)在多孔介质中的垂向运移[J]. 环境工程学报, 2015,(4):1842-1848. Zhu Zhen-hui, Gao Zong-jun, Zhang Xiao-hai, et al. Vertical migration of LNAPLs (diesel) in porous medium[J]. Chinese Journal of Environmental Engineering, 2015,(4):1842-1848.
[3]	莫龙庭.DNAPL污染源识别和多相流及生物堵塞模拟研究[D]. 南京:南京大学, 2016. MO Long-ting. Source search algorithm application and modeling of DNAPL transportation and remidiation[D]. NanJing:NanJing University, 2016.
[4]	杨明星,杨悦锁,杜新强,等.石油污染地下水有机污染组分特征及其环境指示效应[J]. 中国环境科学, 2013,33(6):1025-1032. YANG Ming-xing, YANG Yue-suo, DU Xin-qiang, et al. Organic fractious and their environmental implications of petroleum contaminated groundwater[J]. China Environmental Science, 2013, 33(6):1025-1032.
[5]	王金成,井明博,张绍鹏,等.不同生物质炭对陇东黄土高原石油污染土壤的修复作用[J]. 中国环境科学, 2020,40(6):2565-2576. WANG Jin-cheng, JING Ming-bo, ZHANG Shao-peng, et al. Remediation effects of the different biochars on crude-oil contaminated soil in eastern Gansu Province of the Loess Plateau[J]. China Environmental Science, 2020,40(6):2565-2576.
[6]	任慧.高浓度石油污染土壤异位-原位联合生物修复技术研究[D]. 济南:山东师范大学, 2015. REN Hui. Research of ectopic joint in-situ bioremediation technology for high concentrations of petroleum contaminated soil[D]. Jinan:Shandong Normal University, 2015.
[7]	Alazaiza M Y D, Ngien S K, Bob M M, et al. Non-aqueous phase liquids distribution in three-fluid phase systems in double-porosity soil media:Experimental investigation using image analysis[J]. Groundwater for Sustainable Development, 2018,7:133-142.
[8]	杨明星.石油有机污染组分在水位波动带中的分异演化机理研究[D]. 长春:吉林大学, 2014. YANG Ming-xin. Fate and Transport of Petroleum organic Compounds in Water Table Fluctuation Zone[D]. Changchun:Jilin University, 2014.
[9]	高燕维,郑菲,施小清,等.基于透射光法探讨水流流速对DNAPL运移分布的影响[J]. 环境科学, 2015,36(7):2532-2539. GAO Yan-wei, ZHENG Fei, SHI Xiao-qing, et al. Laboratory Investigation of DNAPL Migration Behavior and Distribution at Varying Flow Velocities Based on Light Transmission Method[J]. Environmental Science, 2015,36(7):2532-2539.
[10]	胡黎明,邢巍巍,吴照群.多孔介质中非水相流体运移的数值模拟[J]. 岩土力学, 2007,28(5):951-955. HU Nin-ming, XIN Wei-wei, WU Zhao-qun. Numerical simulation of non-aqueous phase liquids migration in porous media[J]. Rock and Soil Mechanics, 2015,36(7):2532-2539.
[11]	赵雷.饱和多孔介质内多组分非水相有机物溶解传递机制研究[D]. 天津:天津大学, 2015. ZHAO Lei. Dissolution and transfer mechanism of multi-components non-aqueous phase organic liquids in saturated porous media[J]. Tianjin:Tianjin University, 2015.
[12]	Bear J. Dynamics of Fluids in Porous Media[J]. Journal of Fluid Mechanics, 1973,61(1):206-208.
[13]	Ngien S K, Ken T L. Numerical model for NAPL migration in double-porosity subsurface systems[J]. Proceedings of the 36th iahr world congress, 2015:5770-5774.
[14]	Ruffino B, Zanetti M. Adsorption study of several hydrophobic organic contaminants on an aquifer material[J]. American Journal of Environmental Sciences, 2009,5(4):507-515.
[15]	Cary J W, Simmons C S, McBride J F. Predicting oil infiltration and redistribution in unsaturated soils[J]. Soil Science Society of America, 1989,53(2):335-342.
[16]	Eckberg D K, Sunada D K. Nonsteady three-phase immscible fluid distribution in porous media[J]. Water Resource Research, 1984, 20(12):1891-1891.
[17]	Pantazidou M, N Sitar. Emplacement of nonaqueous liquids in the vadose zone[J]. Water Resource Research, 1993,29(3):705-722.
[18]	Schroth Martin H, Istok Jonathan D, Selker John S. Three-phase immscible fluid movement in the viciniy of tex-tural interfaces[J]. Journal of Contaminant Hydrology, 1998,32:1-23.
[19]	高彦斌,张松波,李涛,等.饱和黏性土中重质非水相有机污染物纵向迁移数值模拟[J]. 同济大学学报, 2020,48(1):24-32. GAO Yanbin, ZHANG Songbo, LI Tao, et al. Numerical analysis of vertical migration of dense nonaqueous-phase liquids in saturated clay[J]. Journal of Tongji University(Natural Science), 2020,48(1):24-32.
[20]	Leverett M C. Capillary behaviour of porous soilds[J]. Trans AmInst Min Met Eng, 1941,142:152-169.
[21]	武晓峰,唐杰,藤间幸久.多孔介质两相流的统一毛细压力饱和度关系曲线[J]. 灌溉排水, 2000,19(2):15-18. WU Xiao-feng, TANG Jie, TENG Jian-xin-jiu. Unified capillary pressure saturation relationship in porous media two phase flow[J]. Irrigation and Drainage, 2000,19(2):15-18.
[22]	Geller J T, Hunt J R. Mass transfer from nonaqueous phase organic liquids in water-saturated porous media[J]. Water Resources Research, 1993,29:883-845.
[23]	Essaid Hedeff I, Bekins Barbara A, Cozzarelli Isabelle M. Organic contaminant transport and fate in the subsurface:evolution of knowledge and understanding[J]. Water Resources Research, 2015,51(7):4861-4902.
[24]	Parker Beth L, Cherry John A, Chapman Steven W. Field study of TCE diffusion profiles below DNAPL to assess aquitard integrity[J]. Journal of Contaminant Hydrology, 2004,74(1/4):197-230.
[25]	余梅.氯苯类化合物在低渗透粘性土介质中的迁移规律研究[D]. 北京:中国地质大学, 2016. YU Mei. A Dissertation Submitted to China University of Geosciences For the Doctor Degree of Philosophy[D]. Beijing:China University of Geosciences, 2016.
[26]	Liao B, Aral M M. Semi-analytical solution of two-dimensional sharp interface LNAPL transport models[J]. Journal of Contaminant Hydrology, 2000,44:203-211.
[27]	Van Genuchten. Closed-form equation for predicting the hydraulic conductivity of unsaturated soils[J]. Soil Science Society of America Journal, 1980,44(5):892-898.
[28]	Mualem Y. A new model for predicting the hydraulic conductivity of unsaturated porous media[J]. Water Resource Research, 1976,12:513-522.
[29]	吴照群.非水相流体在土体中运移的数值模拟[D]. 北京:清华大学, 2008. WU Zhao-qun. Numerical Modeling of NAPLs Transport in Soils[D]. Beijing:Tsinghua University, 2008.
[30]	李晔,鹿琪,刘财.LNAPL迁移的数值模拟和土壤介电性质的变化分析[J]. 地球物理学进展, 2014,29(2):936-943. LI Ye, LU Qi, LIU Cai. Numerical simulation of LNAPLs migration and analysis on variation of soil dielectric properties[J]. Progress in Geophysics, 2014,29(2):936-943.