Remediation of the Contaminated Soil around a Railroad Turnout

초록

Lubricant is a main pollutant in the soil around a railroad turnout. Considering the status of field site, three remediation methods were tested in this study to remove lubricant from the contaminated soil. The removal efficiency of TPH was much higher by soil washing than by chemical oxidation for the same soil sample. At the biodegrading test of the contaminated soil, lubricant in soil was removed just by 37 % since 25 days because its initial TPH concentration was more than 5 times compared with that for the soil washing test. In the future, the removal efficiency of TPH for the railroad soil contaminated by lubricant would be enhanced by the feasibility test of remediation methods in the field.