Abstract
Aqueous phase liquid (APLs) leakage and spillage into the subsurface system, leading to groundwater contamination is an issue that needs to be addressed. This paper aims to investigate the APLs migration characteristics in fractured non-isothermal double-porosity soil. A laboratory experiment was conducted to observe and monitor the characteristics of the soil structure and APLs migration in heated deformable double-porosity soil using digital image processing technique. The results show rapid liquid migration for the fractured soil samples. The time taken for the liquid to migrate under the application of heat is less for sample with low moisture content due to faster dry off and rapid evaporation. It can be concluded that APLs migration under vibration and non-isothermal effect is highly influenced by the soil sample structure, the soil fractured pattern, the soil water content, and the applied heat in the soil.
Highlights
With an increase in global populations, groundwater has become one of the world most extracted natural resources
An experiment on toluene migration in double-porosity soil with 25% and 30% moisture content and the results have shown the non-aqueous phase liquid (NAPL) migration from top to bottom took about 38 minutes and 4 minutes with fully 100% NAPL migrated into the soil were conducted by Sa’ari et al [19] and Ngien et al [10], respectively
This study was intentionally designed to monitor the dyed APL migration characteristic and pattern in the non-isothermal fractured double-porosity soil placed in circular acrylic soil column model by using digital image processing technique
Summary
With an increase in global populations, groundwater has become one of the world most extracted natural resources. Due to climate change and increased occurrence of natural disaster that lead to groundwater pollution, negative impact on human health and geo-environment is unavoidable [3,4]. These occurrences have drawn attention to the significance of vibration, groundwater contamination and liquid migration effect on non-. These problems need to be addressed to ensure the sustainability of geo-environmental and groundwater utilization. The behaviour of liquid migration into the subsurface system become increasing complex if the fractured soil has double-porosity feature and is affected by temperature difference. The heat (non-isothermal) imposed to the soil may influence the liquid migration due to changes in the liquid properties, such as viscosity and density, with temperature [13]
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