Laboratory Investigation of Non-aqueous Phase Liquids Migration in Double-porosity Kaolin Soil

• Published in: Water Management and Sustainability in Asia Vol. 23; pp. 151 - 160
• Main Authors: Foong, Loke Kok, Nazir, Ramli, Sa’ari, Radzuan, Ramli, Mohd Zamri, Haniffah, Mohd Ridza Mohd, Kasiman, Erwan Hafizi, Alias, Noraliani
• Format: Book Chapter
• Language: English
• Published: Emerald Publishing Limited 01.01.2021
• Subjects: Environmental management; Public policy & environmental management; NAPL migration; groundwater; vibration; Intact double-porosity; kaolin soil; contamination
• ISBN: 9781800711150; 1800711158
• ISSN: 2040-7262
• DOI: 10.1108/S2040-726220210000023021

Abstract The evolution in developed countries has taken a role in global warming and natural disasters such as flash flood, El-Nino, earthquake and groundwater contamination. The underground storage tank leakage problems and spillage of hydrocarbon liquid leading to the contamination of non-aqueous phase liquids (NAPLs) into the groundwater could reduce the quality of groundwater. This chapter is intended to investigate the behaviour and the pattern of NAPL migrations in double-porosity soil under vibration and intact conditions. The experimental model is developed by using kaolin soil type S300 and toluene as NAPLs. The kaolin soil was mixed with 25% of moisture content to produce kaolin granules in the soil column and vibrate under 0.98 Hz of frequency within 60 seconds. As a result, both specimen liquids completely migrated to the bottom of soil column: sample 1 has higher permeability compared to sample 2. This is due to the fracture in double-porosity soil under vibration effect and loosened the soil structure in sample 1 compared to good intact soil sample 2 with stronger and compact soil structure. In conclusion, this study proves that the dangerous hydrocarbon NAPL migration in fractured double-porosity soil has very harmful effect on the environment and groundwater resources.