water/gas system) as shown in Figs. 2.1 and 2.2 (Pinder and Abriola 1986; Feenstra
and Cherry 1988).
2.2 NAPL Behavior
In order to better understand pure product recovery techniques, the general properties of NAPL, as well as the fundamentals of two-phase flow in porous media, are
discussed in this section.
Fig. 2.1 Schematic representation of the behavior of Light Non-Aqueous Phase Liquids (saturated
zone) [adapted from USEPA (1996)]
Fig. 2.2 Schematic representation of the behavior of Dense Non-Aqueous Phase Liquids (saturated
zone) [adapted from Cohen and Mercer (1993)]
2 Free Product Recovery of Non-aqueous Phase Liquids in Contaminated Sites:. . .
63
and Cherry 1988).
2.2 NAPL Behavior
In order to better understand pure product recovery techniques, the general properties of NAPL, as well as the fundamentals of two-phase flow in porous media, are
discussed in this section.
Fig. 2.1 Schematic representation of the behavior of Light Non-Aqueous Phase Liquids (saturated
zone) [adapted from USEPA (1996)]
Fig. 2.2 Schematic representation of the behavior of Dense Non-Aqueous Phase Liquids (saturated
zone) [adapted from Cohen and Mercer (1993)]
2 Free Product Recovery of Non-aqueous Phase Liquids in Contaminated Sites:. . .
63