Break-up and mobilization of DNAPL by acoustic excitation: Experimental evidence and pore network modeling

Khasi, Saeid; Fayazi, Amir; Kantzas, Apostolos

doi:10.1016/j.chemosphere.2023.138345

Cited by 1 publication

(2 citation statements)

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“…These petrochemical developments have provided more convenience for human beings and are a continually motivating force for our societal economy. However, these factories and facilities have become great potential sources of groundwater contamination and have caused serious damage to the subsurface environment [6,7,11,[13][14][15][16][17][18][19][20]. When dense non-aqueous liquids (DNAPLs) are released into aquifers, groundwater resources are seriously contaminated [21,22].…”

Section: Introductionmentioning

confidence: 99%

“…The groundwater flow can increase the infiltration rate and promote downward migration in aquifers. Moreover, soil moisture dynamics, fluid and porous media properties, and textural and wettability variations have important influences on DNAPL migration and plume development in saturated aquifers [2,15,34]. Furthermore, the remediation process of DNAPL contamination is influenced by many factors, such as the heterogeneity of porous media, scale and dimensionality, and dip-angle orientations [3,4,13,35,36].…”

Section: Introductionmentioning

confidence: 99%

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The Effects of Spill Pressure on the Migration and Remediation of Dense Non-Aqueous Phase Liquids in Homogeneous and Heterogeneous Aquifers

Cheng,

Lu,

et al. 2023

Sustainability

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The spill pressure of the contaminant source is an important factor affecting the amount, location, form, and behavior of the dense non-aqueous phase liquids (DNAPLs) that plume in a contaminated subsurface environment. In this study, perchloroethylene (PCE) infiltration, distribution and, remediation via a surfactant-enhanced aquifer remediation (SEAR) technique for a PCE spill event are simulated to evaluate the effects of the spill pressure of the contaminant source on the DNAPLs’ behavior in two-dimensional homogeneous and heterogeneous aquifers. Five scenarios with different spill pressures of contamination sources are considered to perform the simulations. The results indicate that the spill pressure of the contaminant source has an obvious influence on the distribution of DNAPLs and the associated efficiency of remediation in homogeneous and heterogeneous aquifers. As the spill pressure increases, more and more contaminants come into the aquifer and the spread range of contamination becomes wider and wider. Simultaneously, the remediation efficiency of contamination also decreases from 93.49% to 65.90% as the spill pressure increases from 33.0 kPa to 41.0 kPa for a heterogeneous aquifer with 200 realizations. The simulation results in both homogeneous and heterogeneous aquifers show the same influence of the spill pressure of the contaminant source on PCE behaviors in the two-dimensional model. This study indicates that the consideration of the spill pressure of the contaminant sources (such as underground petrol tanks, underground oil storage, underground pipeline, and landfill leakage) is essential for the disposal of contaminant leakage in the subsurface environment. Otherwise, it is impossible to accurately predict the migration and distribution of DNAPLs and determine the efficient scheme for the removal of contaminant spills in groundwater systems.

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