This research was conducted to optimize the parameter for the application of soil flushing techniques and evaluation of potential appliability of stepwise flushing with HC1 and EDTA to treat soil contaminated by heavy metal. Pb, Cu, Cd, and Zn were selected as target heavy metal. The concentration o...
This research was conducted to optimize the parameter for the application of soil flushing techniques and evaluation of potential appliability of stepwise flushing with HC1 and EDTA to treat soil contaminated by heavy metal. Pb, Cu, Cd, and Zn were selected as target heavy metal. The concentration of Pb, Cu, Cd, and Zn in contaminated soil were l0,000mg/kg, 60mg/kg, 20mg/kg, and, 700mg/kg, respectively. Soil texture of contaminant soil was sandy loam. Flushing solutions used in this research were 0.1N HCl, 0.3N HCl, 1.0N HCl and, 0.01M EDTA, 0.03M EDTA, 0.05M EDTA. Extraction efficiency of heavy metals after flushing according to HCl concentration, 1.0N HCl was optimized as Pb 89%, Cu 99%, Cd 50%, Zn 84%. In extraction efficiencies of each flushing solution, The highest extraction efficiency was 1.0N HCl. The first stage, extracted concentrations of heavy metals were redically increased to about 6 pore volume, after to 10 pore volume slowly increased, at the end extracted concentrations were the same. At the test according soil texture, increased soil partical size, extraction efficiency of heavy metals were rising. For evaluation of extraction appliability of heavy metals, stepwise flushing was conducted, Used in this stepwise flushing solution was 1.0N HC1 and 0.03M EDTA. Extraction efficiencies of stepwise flushing were increased Pb 5%, Cu 2%, Cd 3%, Zn 6%. HC1 and EDTA rate was HCl 15 pore volume and EDTA 5 pore volume (3:1). As a result, 1.ON HCL was optimize flushing solution, and as soil pratical size larger, extraction efficiency was increased. Stepwise flushing was improves extraction efficiency of heavy metal to 6%.
This research was conducted to optimize the parameter for the application of soil flushing techniques and evaluation of potential appliability of stepwise flushing with HC1 and EDTA to treat soil contaminated by heavy metal. Pb, Cu, Cd, and Zn were selected as target heavy metal. The concentration of Pb, Cu, Cd, and Zn in contaminated soil were l0,000mg/kg, 60mg/kg, 20mg/kg, and, 700mg/kg, respectively. Soil texture of contaminant soil was sandy loam. Flushing solutions used in this research were 0.1N HCl, 0.3N HCl, 1.0N HCl and, 0.01M EDTA, 0.03M EDTA, 0.05M EDTA. Extraction efficiency of heavy metals after flushing according to HCl concentration, 1.0N HCl was optimized as Pb 89%, Cu 99%, Cd 50%, Zn 84%. In extraction efficiencies of each flushing solution, The highest extraction efficiency was 1.0N HCl. The first stage, extracted concentrations of heavy metals were redically increased to about 6 pore volume, after to 10 pore volume slowly increased, at the end extracted concentrations were the same. At the test according soil texture, increased soil partical size, extraction efficiency of heavy metals were rising. For evaluation of extraction appliability of heavy metals, stepwise flushing was conducted, Used in this stepwise flushing solution was 1.0N HC1 and 0.03M EDTA. Extraction efficiencies of stepwise flushing were increased Pb 5%, Cu 2%, Cd 3%, Zn 6%. HC1 and EDTA rate was HCl 15 pore volume and EDTA 5 pore volume (3:1). As a result, 1.ON HCL was optimize flushing solution, and as soil pratical size larger, extraction efficiency was increased. Stepwise flushing was improves extraction efficiency of heavy metal to 6%.
주제어
#Soil flushing 중금속 오염 토양 정화 중금속 오염 토양 오염
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