Abstract
In this research, phenol was selected as a representative hydrophilic organic compound and phenanthrene as a representative hydrophobic organic contaminant in petroleum. Fine-grained soil which was manufactured artificially in laboratory was contaminated and EK remediation tests were executed. Also, in order to increase removal efficiency, the surfactant that had been used with improvement technique at the pump-and-treat was used by enhanced method. In the test, the phenol which has high solubility is easily removed, but phenanthrene which has low solubility is almost not. Also, it seems to be the delay phenomenon that the phenanthrene is accumulated near the cathode department vicinity at the enhanced technique which applied the surfactant, but the removal efficiency increases as the surfactant concentration increases. By the test which increases with time, the enhanced method with increasing time is more efficient than the method with increasing surfactant.
본 연구는 유류 화합물 중 phenol을 대표적인 친수성 유기 화합물로, phenanthrene을 대표적인 소수성 유기오염물로 선정하여 실내에서 인위적으로 오염시킨 세립질 지반에 EK 정화 실험을 실시하였다. 또한, 유기 오염물의 제거효율을 높이기 위해 기존의 양수처리에서 향상기법으로 사용하는 계면활성제를 이용한 향상기법을 연구하였다. 실내 bench 스케일 실험결과, 물에 대한 용해도가 높은 phenol은 비교적 쉽게 제거되었지만, 용해도가 낮은 phenanthrene은 거의 제거되지 않음을 알 수 있었다. 또한, 계면활성제를 적용한 향상기법에서 phenanthrene이 음극부 근처에서 누적되는 지연현상을 보였지만, 농도가 증가할수록 제거효율은 증가하였다. 가동시간을 증가시킨 실험을 통해 시간을 증가시키는 것이 계면활성제의 농도를 증가시키는 것보다 효과적인 것을 알 수 있었다.
