Non-aqueous phase liquids distribution in three-fluid phase systems in double-porosity soil media: Experimental investigation using image analysis

Over the last few decades, contamination of groundwater and soil by non-aqueous phase liquids (NAPLs) has become a serious and wide-spread problem for the environment In this research, a light transmission visualization (LTV) method was used to observe the migration of dense non-aqueous phase liquid...

Full description

Bibliographic Details
Main Authors:	Alazaiza, M. Y. D., Ngien, S. K., Bob, M. M., Kamaruddin, S. A., W. M. F., Wan Ishak
Format:	Article
Language:	English
Published:	Elsevier 2018
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/21822/ http://umpir.ump.edu.my/id/eprint/21822/ http://umpir.ump.edu.my/id/eprint/21822/ http://umpir.ump.edu.my/id/eprint/21822/1/Non-aqueous%20phase%20liquids%20distribution%20in%20three-fluid%20phase%20systems1.pdf

id	ump-21822
recordtype	eprints
spelling	ump-218222018-07-30T04:02:04Z http://umpir.ump.edu.my/id/eprint/21822/ Non-aqueous phase liquids distribution in three-fluid phase systems in double-porosity soil media: Experimental investigation using image analysis Alazaiza, M. Y. D. Ngien, S. K. Bob, M. M. Kamaruddin, S. A. W. M. F., Wan Ishak TA Engineering (General). Civil engineering (General) Over the last few decades, contamination of groundwater and soil by non-aqueous phase liquids (NAPLs) has become a serious and wide-spread problem for the environment In this research, a light transmission visualization (LTV) method was used to observe the migration of dense non-aqueous phase liquid (DNAPL) and light non-aqueous phase liquid (LNAPL) in double-porosity soil within a three-fluid phase system (air-NAPL-water). The double-porosity characteristics of the soil were created using a composition made up of local sand and sintered kaolin clay spheres arranged in a periodic manner. Toluene was used to simulate LNAPL while tetrachloroethylene (PCE) represented the DNAPL. Both NAPLs were dyed using Oil-Red-O for better visualization. For comparison purposes, the same experiments were carried out using just local silica sand acting as a type of single-porosity soil. A significant difference in the migration of the toluene and PCE was observed as both the NAPL migration rates in the double-porosity medium were much faster compared to the migration rates found in the single-porosity medium. This result is most likely due to the occurrence of inter-aggregate pores in the double-porosity soil that contribute to increasing velocity of fluids migration through porous media. Other factors such as the wettability of fluids and capillary pressure characteristics that exist in the soil pores were found to be influential factors in fluid migration within porous media. In addition, the results show that chemical properties have a significant influence on the NAPL migration in porous media. It was found that the migration velocity of toluene was much faster compared to the migration velocity of the PCE. This observation is most likely caused by the fact that the distribution coefficient of toluene was higher than that of PCE which in turn means that the retardation factor of toluene is lower than that of PCE in the same porous media. This paper proved that the LTV provides a non-intrusive and non-destructive technique for studying multiphase flow in double-porosity soil media where rapid changes in fluid distribution in the entire flow domain is not easy to measure using conventional tools. Elsevier 2018-04-22 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/21822/1/Non-aqueous%20phase%20liquids%20distribution%20in%20three-fluid%20phase%20systems1.pdf Alazaiza, M. Y. D. and Ngien, S. K. and Bob, M. M. and Kamaruddin, S. A. and W. M. F., Wan Ishak (2018) 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. pp. 133-142. ISSN 2352-801X https://doi.org/10.1016/j.gsd.2018.04.002 doi: 10.1016/j.gsd.2018.04.002
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Alazaiza, M. Y. D. Ngien, S. K. Bob, M. M. Kamaruddin, S. A. W. M. F., Wan Ishak Non-aqueous phase liquids distribution in three-fluid phase systems in double-porosity soil media: Experimental investigation using image analysis
description	Over the last few decades, contamination of groundwater and soil by non-aqueous phase liquids (NAPLs) has become a serious and wide-spread problem for the environment In this research, a light transmission visualization (LTV) method was used to observe the migration of dense non-aqueous phase liquid (DNAPL) and light non-aqueous phase liquid (LNAPL) in double-porosity soil within a three-fluid phase system (air-NAPL-water). The double-porosity characteristics of the soil were created using a composition made up of local sand and sintered kaolin clay spheres arranged in a periodic manner. Toluene was used to simulate LNAPL while tetrachloroethylene (PCE) represented the DNAPL. Both NAPLs were dyed using Oil-Red-O for better visualization. For comparison purposes, the same experiments were carried out using just local silica sand acting as a type of single-porosity soil. A significant difference in the migration of the toluene and PCE was observed as both the NAPL migration rates in the double-porosity medium were much faster compared to the migration rates found in the single-porosity medium. This result is most likely due to the occurrence of inter-aggregate pores in the double-porosity soil that contribute to increasing velocity of fluids migration through porous media. Other factors such as the wettability of fluids and capillary pressure characteristics that exist in the soil pores were found to be influential factors in fluid migration within porous media. In addition, the results show that chemical properties have a significant influence on the NAPL migration in porous media. It was found that the migration velocity of toluene was much faster compared to the migration velocity of the PCE. This observation is most likely caused by the fact that the distribution coefficient of toluene was higher than that of PCE which in turn means that the retardation factor of toluene is lower than that of PCE in the same porous media. This paper proved that the LTV provides a non-intrusive and non-destructive technique for studying multiphase flow in double-porosity soil media where rapid changes in fluid distribution in the entire flow domain is not easy to measure using conventional tools.
format	Article
author	Alazaiza, M. Y. D. Ngien, S. K. Bob, M. M. Kamaruddin, S. A. W. M. F., Wan Ishak
author_facet	Alazaiza, M. Y. D. Ngien, S. K. Bob, M. M. Kamaruddin, S. A. W. M. F., Wan Ishak
author_sort	Alazaiza, M. Y. D.
title	Non-aqueous phase liquids distribution in three-fluid phase systems in double-porosity soil media: Experimental investigation using image analysis
title_short	Non-aqueous phase liquids distribution in three-fluid phase systems in double-porosity soil media: Experimental investigation using image analysis
title_full	Non-aqueous phase liquids distribution in three-fluid phase systems in double-porosity soil media: Experimental investigation using image analysis
title_fullStr	Non-aqueous phase liquids distribution in three-fluid phase systems in double-porosity soil media: Experimental investigation using image analysis
title_full_unstemmed	Non-aqueous phase liquids distribution in three-fluid phase systems in double-porosity soil media: Experimental investigation using image analysis
title_sort	non-aqueous phase liquids distribution in three-fluid phase systems in double-porosity soil media: experimental investigation using image analysis
publisher	Elsevier
publishDate	2018
url	http://umpir.ump.edu.my/id/eprint/21822/ http://umpir.ump.edu.my/id/eprint/21822/ http://umpir.ump.edu.my/id/eprint/21822/ http://umpir.ump.edu.my/id/eprint/21822/1/Non-aqueous%20phase%20liquids%20distribution%20in%20three-fluid%20phase%20systems1.pdf
first_indexed	2023-09-18T22:32:11Z
last_indexed	2023-09-18T22:32:11Z
_version_	1777416359629553664

Non-aqueous phase liquids distribution in three-fluid phase systems in double-porosity soil media: Experimental investigation using image analysis

Similar Items