饱和砂土中DNAPL污染物迁移过程及数值模拟

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Abstract In this paper, based on the parameters obtained from the physical sandbox experiment, the numerical simulation Petrasim program was utilized to simulate the migration process of DNAPL in saturated porous media, which has certain research significance in exploring the migration behavior of DNAPL under the combined action of gravity and capillary force and the contaminants distribution characteristics in the migration paths. The numerical results and experimental data showed that:(1) in the early stage of infiltration, DNAPL was mainly affected by gravity and showed "droplet" vertical diffusion. After vertical diffusion to the bottom impervious layer, DNAPL began to redistribute and spread laterally driven by capillary force, and finally forms a long-term "pool" contaminant source area at the bottom of sandbox; (2) By comparing the simulation results with the experimental data, the relative error range of the vertical diffusion was -2.96%~5.95%. The relative error range of horizontal diffusion was 0.04%~23.41%, and the relative error range of plane contamination area was 0.03%~19.39%. The fitting determination coefficients R² which characterize the differences between the simulated values and the experimental data of horizontal diffusion, vertical diffusion and contaminant area were 0.8827, 0.9919 and 0.9832, respectively. The simulation results were close to the experimental data, which is satisfactory. The reliability and accuracy of numerical simulation Petrasim program in predicting DNAPL migration behavior and contaminant distribution in saturated porous media were investigated in this study. Indicating that the assessment of DNAPL leakage range and the prediction of DNAPL migration behavior have broad application prospects in the field environment.

Key words： dense non-aqueous phase liquid distribution of contaminants numerical simulation saturated sandy soils

Received: 21 June 2023

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	XIAO Peng
	LIU Han-le

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XIAO Peng,LIU Han-le. Transport processes and numerical simulation of DNAPL contaminants in saturated sandy soils[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(1): 386-395.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I1/386

[1]	郑菲,高燕维,徐红霞,等.非均质性对DNAPL污染源区结构特征影响的实验研究[J].水文地质工程地质, 2016,43(5):140-148.Zheng F, Gao Y W, Xu H X, et al.An experimental study of the influence of heterogeneity on the DNAPL source-zone architecture [J].Hydrogeology & Engineering Geology, 2016,43(5):140-148.
[2]	Wang Q, Jeong S W, Choi H.Removal of trichloroethylene DNAPL trapped in porous media using nanoscale zerovalent iron and bimetallic nanoparticles:direct observation and quantification [J].Journal of Hazardous Materials, 2012,213-214:299-310.
[3]	高尚,王磊,龙涛,等.污染地块中高密度非水相液体(DNAPLs)迁移特征及判定调查技术研究进展[J].生态与农村环境学报, 2018,34(4):289-299.Gao S, Wang L, Long T, et al.Research progress on migration characteristics and investigation technologies of DNAPLs contaminated sites [J].Journal of Ecology and Rural Environment, 2018,34(4):289-299.
[4]	王慧婷,徐红霞,郭琼泽,等.饱和多孔介质中DNAPL污染源区结构及质量溶出[J].中国环境科学, 2019,39(8):3474-3483.Wang H T, Xu H X, Guo J Z, et al.Dense non-aqueous phase liquid source zone architecture and dissolution in saturated porous media [J].China Environmental Science, 2019,39(8):3474-3483.
[5]	Engelmann C, Schmidt L, Werth C J, et al.Quantification of uncertainties from image processing and analysis in laboratory-scale DNAPL release studies evaluated by reflective optical imaging [J].Water, 2019,11(11):2274.
[6]	刘汉乐,郝胜瑶,马建初.多孔介质界面对重非水相液体迁移过程影响的图像法研究[J].水文地质工程地质, 2019,46(5):169-174.Liu H L, Hao S Y, Ma J C.Investigation on the influence of porous media interface on DNAPL migration based on image methods [J].Hydrogeology & Engineering Geology, 2019,46(5):169-174.
[7]	Engelmann C, Sookhak Lari K, Schmidt L, et al.Towards predicting DNAPL source zone formation to improve plume assessment:using robust laboratory and numerical experiments to evaluate the relevance of retention curve characteristics [J].Journal of Hazardous Materials, 2021,407:124741.
[8]	李培华,刘汉乐,侯森戈.融合电阻率成像法及图像法的DNAPL污染过程研究[J].地球物理学进展, 2021,36(5):2185-2190.Li P H, Liu H L, Hou S G.Investigation on DNAPL contamination process of fusing ERT and image method [J].Progress in Geophysics, 2021,36(5):2185-2190.
[9]	侯森戈,杨博天,杨登波,等.饱和砂土中粗砂透镜体对DNAPL迁移过程的影响研究[J].环境科学与技术, 2022,45(7):105-111.Hou S G, Yang B T, Yang D B, et al.Investigation of coarse sand lens effect on DNAPL migration process in saturated sand [J].Environmental Science & Tech⁃nology, 2022,45(7):105-111.
[10]	邓亚平,郑菲,施小清,等.多孔介质中DNAPLs运移行为研究进展[J].南京大学学报(自然科学), 2016,52(3):409-420.Deng Y P, Zheng F, Shi X Q, et al.Review on the transport of dense non-aqueous phase liquids in porous media [J].Journal of Nanjing University (Natural Sciences), 2016,52(3):409-420.
[11]	D'Aniello A, Hartog N, Sweijen T, et al.Infiltration behaviour of elemental mercury DNAPL in fully and partially water saturated porous media [J].Journal of Contaminant Hydrology, 2018,209:14-23.
[12]	Wu M, Wu J, Cao H, et al.The influences of ionic strength and permeability on DNAPLs representative elementary volume in porous media [J].Journal of Hydrology, 2019,575:94-104.
[13]	Wu M, Cheng Z, Wu J, et al.Effects of inner heterogeneity on long-term DNAPL migration in porous media [J].Environmental Earth Sciences, 2017,76(23):791.
[14]	张蔚,施小清,吴剑锋,等.渗透率空间变异性对重非水相流体运移的影响[J].高校地质学报, 2013,19(4):677-682.Zhang W, Shi X Q, Wu J F, et al.Impacts of the spatial variation of permeability on the transport of dense non-aqueous phase liquids in porous media [J].Geological Journal of China Universities, 2013, 19(4):677-682.
[15]	邓亚平,张烨,施小清,等.非均质裂隙介质中重非水相流体运移[J].水科学进展, 2015,26(5):722-730.Deng Y P, Zhang Y, Shi X Q, et al.Study on the migration of dense non-aqueous phase liquids in heterogeneous fracture media [J].Advances in Water Science, 2015,26(5):722-730.
[16]	程洲,吴吉春,徐红霞,等.DNAPL在透镜体及表面活性剂作用下的运移研究[J].中国环境科学, 2014,34(11):2888-2896.Cheng Z, Wu J C, Xu H X, et al.Investigation of the migration characteristic of DNAPL in aquifer with lenses and under the action of surfactant flushing [J].China Environmental Science, 2014,34(11):2888-2896.
[17]	Erning K, Grandel S, Dahmke A, et al.Simulation of DNAPL infiltration and spreading behaviour in the saturated zone at varying flow velocities and alternating subsurface geometries [J].Environmental Earth Sciences, 2011,65(4):1119-1131.
[18]	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 Y W, Zheng F, Shi X Q, 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.
[19]	郑菲,高燕维,施小清,等.地下水流速及介质非均质性对重非水相流体运移的影响[J].水利学报, 2015,46(8):925-933.Zheng F, Gao Y W, Shi X Q, et al.Influence of groundwater flow velocity and geological heterogeneity on DNAPL migration in saturated porous media [J].Shui Li Xue Bao, 2015,46(8):925-933.
[20]	常兴,骆乾坤,邓亚平,等.裂隙宽度空间变异性和泄漏条件对网络裂隙中DNAPLs运移影响研究[J].水文地质工程地质, 2022,49(3):174-181.Chang X, Luo Q K, Deng Y P, et al.Effects of spatial variability of fracture width and leakage conditions on the migration of DNAPLs in network fractures [J].Hydrogeology & Engineering Geology, 2022, 49(3):174-181.
[21]	Page J W E, Soga K, Illangasekare T.The significance of heterogeneity on mass flux from DNAPL source zones:an experimental investigation [J].Journal of Contaminant Hydrology, 2007,94(3/4):215-234.
[22]	施小清,姜蓓蕾,吴吉春,等.非均质介质中重非水相污染物运移受泄漏速率影响数值分析[J].水科学进展, 2012,23(3):376-382.Shi X Q, Jiang B L, Wu J C, et al.Numerical analysis of the effect of leakage rate on dense non-aqueous phase liquid transport in heterogonous porous media [J].Advances In Water Science, 2012, 23(3):376-382.
[23]	Yang L, Wang X, Mendoza-Sanchez I, et al.Modeling the influence of coupled mass transfer processes on mass flux downgradient of heterogeneous DNAPL source zones [J].Journal of Contaminant Hydrology, 2018,211:1-14.
[24]	Wu M, Yang Y, Lin J, et al.The co-effect of heterogeneity and solute concentration on representative elementary volume of DNAPL in groundwater [J].Journal of Hydrology, 2020,585:124795.
[25]	郭亚敏.DNAPL污染物运移规律研究[D].北京:中国矿业大学, 2019.Guo Y M.Study on the migration law of dense non-aqueous phase liquids pollutants [D].Beijing:China University of Mining and Technology, 2019.
[26]	Huber E J, Stroock A D, Koch D L.Analysis of a time dependent injection strategy to accelerate the residual trapping of sequestered co2 in the geologic subsurface [J].International Journal of Greenhouse Gas Control, 2016,44:185-198.
[27]	Luboń K, Tarkowski R.Numerical simulation of hydrogen injection and withdrawal to and from a deep aquifer in NW Poland [J].International Journal of Hydrogen Energy, 2020,45(3):2068-2083.
[28]	侯森戈.融合电阻率成像与图像法对DNAPL污染过程的精细刻画[D].桂林:桂林理工大学, 2022.Hou S G.Fusion electrical resistivity technology and image method for the high-resolution characterization of DNAPL contaminant process [D].Guilin:Guilin University of Technology, 2022.
[29]	Stone H L.Probability model for estimating three-phase relative permeability [J].Journal of Petroleum Technology, 1970,22(2):214-218.
[30]	Parker J C, Lenhard R J, Kuppusamy T.A parametric model for constitutive properties governing multiphase flow in porous media [J].Water Resources Research, 1987,23(4):618-624.