Publication de 12 numéros par an
ISSN Imprimer: 1091-028X
ISSN En ligne: 1934-0508
Indexed in
QUANTIFICATION OF DENSE NONAQUEOUS PHASE LIQUID SATURATION IN DOUBLE-POROSITY SOIL MEDIA USING A LIGHT TRANSMISSION VISUALIZATION TECHNIQUE
RÉSUMÉ
In this research, the light transmission visualization (LTV) technique was used to measure the dense nonaqueous phase liquid (DNAPL) saturation distribution in a two-dimensional (2-D) flow chamber packed with double-porosity soil medium. This, to the best of our knowledge, is a new application of LTV in measuring DNAPL saturation as well as monitoring its migration in double-porosity soil media. The double-porosity structure was created using layers of fine silica sand and solidified kaolin clay spheres. Tetrachloroethylene (PCE) was used to simulate DNAPL and was dyed with Oil-Red-O for better visualization. Known amounts of PCE were injected into the flow chamber before being correlated to amounts calculated using image analysis based on the LTV method. A strong correlation having an R2 value of 0.994 was found between the injected PCE volumes and calculated PCE volumes obtained from the LTV method. For comparative purposes, the same experiment was carried out by filling the flow chamber with local silica sand as a single-porosity medium to investigate the influence of soil structure on DNAPL migration. Results, again, showed a strong correlation, with an R2 value of 0.996, between the amounts of PCE injected into the flow chamber and the calculated amounts of PCE. A significant difference in the migration of PCE in the two experiments was observed as the rate of PCE migration in the double-porosity medium was much faster compared to the migration rate in the single-porosity medium. This finding is most likely due to the occurrence of interaggregate pores in the double-porosity soil. This research proves that the noninvasive and nonintrusive LTV technique can be used to quantify DNAPL saturation in double-porosity soil structure in 2-D, two-phase systems.
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Alazaiza Motasem Y.D., Ngien Su Kong, Bob Mustafa M., Kamaruddin Samira A., Ishak Wan Mohd Faizal, Non-aqueous phase liquids distribution in three-fluid phase systems in double-porosity soil media: Experimental investigation using image analysis, Groundwater for Sustainable Development, 7, 2018. Crossref
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Alazaiza Motasem Y. D., Copty Nadim K., Ngien Su Kong, Bob Mustafa M., Aburas Maher M., Characterization of Capillary Pressure–Saturation Relationships for Double-Porosity Medium Using Light Transmission Visualization Technique, Transport in Porous Media, 130, 2, 2019. Crossref
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Alazaiza Motasem Y.D., Copty Nadim K., Abunada Ziyad, Experimental investigation of cosolvent flushing of DNAPL in double-porosity soil using light transmission visualization, Journal of Hydrology, 584, 2020. Crossref
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Alazaiza Motasem Y. D., Al Maskari Tahra, Albahansawi Ahmed, Amr Salem S. Abu, Abushammala Mohammed F. M., Aburas Maher, Diesel Migration and Distribution in Capillary Fringe Using Different Spill Volumes via Image Analysis, Fluids, 6, 5, 2021. Crossref
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Alazaiza Motasem Y.D., Ramli Mohd Harris, Copty Nadim K., Ling Mah Chia, Assessing the impact of water infiltration on LNAPL mobilization in sand column using simplified image analysis method, Journal of Contaminant Hydrology, 238, 2021. Crossref
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Wang Chao, Su Xiaosi, Lyu Hang, Yuan Zhijiang, Remobilization of LNAPL in unsaturated porous media subject to freeze-thaw cycles using modified light transmission visualization technique, Journal of Hydrology, 603, 2021. Crossref
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He Zhennan, Liang Fachun, Meng Jia, Li Naiming, Effects of groundwater fluctuation on migration characteristics and representative elementary volume of entrapped LNAPL, Journal of Hydrology, 610, 2022. Crossref