Ultrafiltration

Figure 4, Ultrafiltration

MEMBRANE

macromoleculM

salts

Figure 4, Ultrafiltration

Figure Five (5) illustrates reverse osmosis which typically separates materials less than .0001 microns (10 angstroms in size). Reverse osmosis offers the added advantage of rejecting ionic materials which are normally small enough to pass through the pores of the membrane. As with ultrafiltration, reverse osmosis is used to remove dissolved materials.

Polymers used in reverse osmosis membranes include: -Polyamide

-Thin Film Composite (TFC) -Cellulose Triacetate

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