철도오염토양의 토양세정법 현장 적용을 위한 최적화 연구

초록

Generally, the soil pollution of railroad site has been caused by oil leakage around the fueling line of railcars or UST. In this study, soil flushing method is applied at the field to treat the contaminated railroad soil. The field test was investigated about recovery ratio and post-processing efficiency with time interval. The target soil is mainly contaminated by diesel and most of pollutants are highly distributed at depth of 1m to 3m from the soil surface. The size of pilot-scale experiment is 3m x 3m and the used surfactant as a washing agent is a Triton X-100. Pilot-scale soil washing processes are consisted of four units such as extraction well, effluent storage tank, activated carbon treatment tank, and discharging tank. Based on the results of this research, the removal efficiency of the contaminated railroad soil will be enhanced by the optimization of operations conditions in future.