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ULTRAFILTRATION

Definition

Similar to reverse osmosis, ultrafiltration is a pressure-driven membrane process being capable of separating solution components on the basis of molecular size and shape. Under an applied pressure difference across an ultrafiltration membrane, solvent and small solute species pass through the membrane, while larger solute species are retained by the membrane and recovered as a concentrated retentate. Ultrafiltration involves solutes whose molecular dimensions are l0 or more times larger than those of the solvent and are usually below 0.5 mm size.

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