Changes in Solubility and Migration Behavior of Trichloroethylene by Addition of Several Surfactants and High-Molecular-Weight Organic Compounds
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To learn the efficiency and inefficiency of the washing-reagent-injection method for the treatment of subsurface pollution by dense nonaqueous phase liquids, we investigated changes in the saturation solubility and migration behavior of trichloroethylene (TCE) in the presence of several washing reagents. Several types of reagents were tested: four anionic surfactants, one cationic surfactant, five nonionic surfactants, and four high-molecular-weight organic compounds. The effect of reagent type and concentration on TCE solubility and migration behavior in glassbead-packed columns appeared severally each other. Several of the surfactants drastically increased the solubility of TCE, but some surfactants and the high-molecular-weight organic compounds had no effect on TCE solubility. The migration behaviors of undiluted TCE in the washing-reagentsaturated columns differed substantially for the tested chemicals . Some of the surfactants introduced rapid gravity-driven migration over a wide range of concentrations . No direct relationship was observed between the results for the solubility experiments and for the migration experiments. Determination of the migration behavior of pollutants is very important for the selection of a suitable washing reagent that can avoid the spreading of TCE to a lower groundwater layer.
- 社団法人 環境科学会の論文
社団法人 環境科学会 | 論文
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