물리 화학적 반응을 이용한 디젤 오염 토양 내 TPH 분석 = Physicochemical Interactions of TPH from the Contaminated Soil with Diesel

다국어 초록 (Multilingual Abstract)

Physicochemical reactions have been used to remove the organic compounds from the contaminated soils with petroleum hydrocarbons due to their properties. Among various oxidizing chemicals, persulfate-based SOREM™ (Potassium monopersulfate & Sodium persulfate compound) which produced SO4∙ radical in water has received a great attention. This radical has shown higher remediation efficiency than OH∙ radical produced by hydrogen peroxide. In this study, soil contaminated with total petroleum hydrocarbon (TPH) was treated with persulfated-based oxidant. Various amounts of oxidant (0.5, 1, 3, 5%) were applied to soil spiked with 20,000 ppm diesel (equivalent to 313.4 ppm TPH) for 10, 30, 60, and 120 min, respectively. The residual TPH in soil after treatment of oxidant was extracted with a mixture of methylene chloride and acetone (1：1). Aliquot of extraction was analyzed by GC-FID (Hewlett-Packard, 5890 II) with a capillary column (Ultra-2, 25 m×0.20 mm×0.33 µm). The temperature programming was used at 45°C for 2 min increased at the rate of 10°C / min to 310°C for 25 min and the injector temperature was 280°C. The soil used in this study was consisted of sand (54.55%), silt (31.83%), and clay (0.03%). The best efficiency on TPH removal was achieved using 0.5% SOREM™ for 60 min and its efficiency was ranged of 79.4∼87.9%. Based on our preliminary study, oxidation was combined with thermal desorption treatment for the contaminated soil with TPH. The efficiency of TPH remediation in this experiment was 86.9%∼97.1%.