Experimental study on retardation of a heavy NAPL vapor in partially saturated porous media
Non-aqueous-phase liquid (NAPL) contaminants introduced into the unsaturated zone spread as a liquid phase; however, they can also vaporize and migrate in a gaseous state.Vapor plumes migrate easily and thus pose a potential threat to underlying aquifers.Large-scale column experiments were performed to quantify partitioning processes responsible fo