corresponding to mass–flux relations (Fure et al. 2006) in these experiments. The
removals during the water flushing vary from 32 to more than 40% showing that
small local differences in hydraulic conductivity or initial concentrations can lead to
quite variable fluxes. As evidenced by the log transformation in Fig. 4.10, the
decrease is quite rapid after this point. This behavior has been reported before in
experiments conducted by other authors (Nambi and Powers 2000). Indeed a slight
initial heterogeneity is enhanced by water flow due to the relative permeability effect
(Jawitz et al. 2005; Powers et al. 1994).
During the persulfate treatment, for 53% mass removed, the observed concentration was as low as 0.9 mg L
À1 . The results for the surfactant are different. The slope
Fig. 4.9 Comparison of the
removals for the four
treatment techniques, (a)
comparison of removal
between tank lenses, (b)
overall yields
228
F. Jousse et al.
removals during the water flushing vary from 32 to more than 40% showing that
small local differences in hydraulic conductivity or initial concentrations can lead to
quite variable fluxes. As evidenced by the log transformation in Fig. 4.10, the
decrease is quite rapid after this point. This behavior has been reported before in
experiments conducted by other authors (Nambi and Powers 2000). Indeed a slight
initial heterogeneity is enhanced by water flow due to the relative permeability effect
(Jawitz et al. 2005; Powers et al. 1994).
During the persulfate treatment, for 53% mass removed, the observed concentration was as low as 0.9 mg L
À1 . The results for the surfactant are different. The slope
Fig. 4.9 Comparison of the
removals for the four
treatment techniques, (a)
comparison of removal
between tank lenses, (b)
overall yields
228
F. Jousse et al.