Partitioning tracer method for quantifying the residual saturation of refined petroleum products in saturated soil |
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| Authors: | Sungsu Rhee Jungu Kang and Junboum Park |
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| Institution: | (1) Waste-to-Energy Research Division, Environmental Resources Research Department, National Institute of Environmental Research, Environmental Research Complex, Kyungseo-dong, Seo-gu, Incheon, 404-708, South Korea;(2) Department of Civil and Environmental Engineering, Seoul National University, San 56-1 Shinlim-dong, Gwanak-gu, Seoul, 151-742, South Korea |
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| Abstract: | The effective site assessment is crucial to the successful remediation of the subsurface contaminated with light nonaqueous
phase liquids (LNAPLs). Recent studies showed that large spatial volumes of the subsurface contaminated with LNAPLs could
be investigated with the partitioning tracer method. This study investigated the applicability of the partitioning tracer
method for detecting and quantifying refined petroleum products in a saturated aquifer containing alluvial soil or weathered
granite soil. In the batch-partitioning experiments, the partition coefficients of alcohol tracers between the petroleum mixture
and water were measured, and they were found to be increased in proportion to the boiling points of the alcohol tracers when
the molecular weights of the alcohol tracers were similar. The sorption isotherm experiments indicated that a considerable
amount of 4-methyl-2-pentanol was sorbed into Jumunjin sand (JS) or weathered granite soil (WGS). In the column experiments,
it was confirmed that the partitioning tracer method could be used as a method for detecting the presence of the petroleum
mixture in saturated soil, and the residual saturation of the petroleum mixture in the soil column prepared by firstly contaminating
with the petroleum mixture and secondly saturating with water was measured higher than that in the soil column prepared by
firstly saturating and secondly contaminating. The highest accuracy of estimation using the partitioning tracer method was
found for 2-ethyl-1-butanol and the lowest accuracy was found for 4-methyl-2-pentanol. |
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