3D 시스템에서 실리콘 에멀전을 이용한 trichloroethylene의 제거

초록

As the alternative for surfactant flushing, emulsion flushing was proposed and studied in batch and 1-dimensional system [1,2]. The success of flushing technologies depends on the ability to deliver flushing fluids to zones of contamination and to capture the resulting dissolved contaminant plume, and in some cases, displaced free product [3]. Numbers of researchers have performed 1 dimensional and larger scale system studies to observe the effect of delivery or mass transfer limitation in the subsurface conditions [4-5]. In two-dimensional flushing of tetrachloroethylene [6], the 4% Tween 80 solution, which was slightly denser (1.002 g/ml at 20 ℃) than the resident pore water (0.998 g/ml at 20 ℃), flowed preferentially along the bottom of the box. This preferential flow of a surfactant solution is not desirable because the delivery efficiency of surfactants to contaminants is low and secondary contamination of aquifer can happen by migration of dense solutions containing contaminants. Therefore, the effectiveness of emulsion flushing with large scale system should be investigated for the feasibility of emulsion-based remediation. In this study, flushing with silicone emulsion was investigated with 3 dimensional system.