4(%3)3 - Ecole nationale supérieure de chimie de Montpellier

curves for feed, retentate and permeate have been shown for two series fed to a membrane at 0.6 bar(Figure – 3.19).109Silica SP1Differntial Distribution876543210RetentatePermeateFeed0 100 200 300 400 500 600 700 800Diameter (nm)1098Differential Distribution7654321Silica SP2RetentatePermeateFeed00 100 200 300 400 500 600 700 800Diameter (nm)Figure – 3.19: Differential distribution curves obtained for silica nanoparticles (SP1 and SP2) in the feed, retentateand permeate of a membrane at 0.6 bar.Since nothing conclusive could be drawn from the aforementioned curves, the global retentionvalues were calculated from the concentrations which in turn obtained from the observed kcps values93