Figure 4.
Comparison of TCE permeabilities for GO films and engineered polymer-matrix barrier films. Red squares are permeability values calculated from flux data in the present study. The upper set of green lines are engineered composite barriers of chlorobutyl rubber with modified or unmodified montmorillonite nanoclays, from Sridhar and Tripathy.55 The lower set of green lines are geo-membranes consisting of multiple layers of high- and low-density polyethylene, ethylene vinyl alcohol, and different types of fillers, from McWatters and Rowe.56,57 Some literature permeability values were estimated from reported diffusivities (see details in Section S7 of the SI).