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Quantification of Diesel in Soils using the Partitioning Tracer Method with Two-dimensional Soil Box
Rhee, Sung-Su;Lee, Gwang-Hun;Park, Jun-Boum;
Department of Civil and Environmental Engineering, Seoul National University;Department of Civil and Environmental Engineering, Seoul National University;Department of Civil and Environmental Engineering, Seoul National University;
분배성 추적자 기법을 이용한 디젤 오염 토양의 정량적 오염도 평가에 관한 2차원 토조 실험 연구
이성수;이광헌;박준범;
서울대학교 공과대학 건설환경공학부;서울대학교 공과대학 건설환경공학부;서울대학교 공과대학 건설환경공학부;

Abstract

The partitioning tracer method is to estimate the residual saturation of nonaqueous phase liquid (NAPL) in soils by analyzing tracer's retardation induced by the reversible partitioning of tracer with NAPL. This study is to estimate the residual diesel saturation in soils using the partitioning tracer method. Two-dimensional soil box was used to represent the 2-dimensional flows of groundwater and tracer solution in the saturated aquifer, and the soil box was filled with soil and then saturated with water. The residual diesel saturation was induced in saturated soil, and the partitioning tracer method was applied. The results from batch-partitioning experiment indicated that the diesel-water partitioning was linear with respect to tracer's concentration, and the partition coefficient of tracer between diesel and water was measured by their linearities. The groundwater flow in the saturated aquifer was simulated in the 2-dimensional soil box, and the residual diesel contamination was visually identified. The results from the partitioning tracer method with or without diesel in soils confirmed that 4-methyl-2-pentanol, 2-ethyl-1-butanol and 1-hexanol, can be used as a detecting method for diesel contamination. By the accuracies of estimations for diesel contamination using the partitioning tracer method, 2-ethyl-1- butanol showed the highest accuracy with 83%.

Keywords: Soil contamination;LNAPL;Diesel;Partitioning tracer method;2-D soil box experiment;

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