The Remediation Characteristic of Soil Contaminated with Heavy Metal and Total Petroleum Hydrocarbon (TPH) by Enhanced Electrokinetic with Fenton Oxidation and Soil Flushing Method

ABSTRACTThis research reports the enhanced Electrokinetic (EK) with H 2 O 2 and sodium dodecyl surfate (SDS), which are commonly used in Fenton oxidation and soil flushing method, in order to remediate soil contaminated with heavy metals and Total Petroleum Hydrocarbons (TPH) simultaneously. In addition, influences of property of soil and concentration of chemical solution were investigated through experiments of different types of soils and varying concentration of chemical reagents. The results indica ted, in the experiments using artificially contaminated soil, the highest removal efficiency of heavy metals using 10% H 2 O 2 and 20mM SDS as electrolytes. However, in the experiments using Yong-San soils (study area), rem ediation efficiency of heavy metals was decr eased because high acid buffering capacity. Through experiment of 20% H 2 O 2 and 40mM SDS, increased electric current influences the remediation of heavy metals due to decrease in the soil pH. In the experiments of Yong-San soils, the remediation efficiency of TPH was decreased compared with artificially spiked soils because high acid buffering capacity and organic carbon contents. Further more, the scavenger effect of SDS influenced TPH oxidation efficiency under the conditions of injected 40mM SDS in the soils. Therefo re, the property of soil and concentration of chemical reagents cause the electroosmotic flow, soil pH, remediation efficiency of heavy metals and TPH.Key words : Soil contamination, Heavy metal, Total petroleum hydrocarbon (TPH), Electrokinetic (EK), Fenton oxidation초 록중금속과 총 석유 탄화수소(TPH)로 동시 오염된 복합오염 토양을 정화하기 위해 펜톤 산화와 토양 세정법에 활용되고 있는 H