Ultrafiltration

Both ultrafiltration and reverse osmosis depend on pressure as the driving force and require a membrane that is permeable to some components and impermeable to others.

The difference between the two processes is that, while ultrafiltration is usually used to separate solutes above a molecular weight of 500-2000, which implies a relatively small osmotic pressure, reverse osmosis is used to remove material of low molecular weight, which causes a high osmotic pressure. The polarization is, however, usually greater by ultrafiltration than by reverse osmosis, because the diffusion constant is two or three orders of magnitudes smaller for the macro-molecules than for inorganic ions.

Was this article helpful?

0 0
Waste Management And Control

Waste Management And Control

Get All The Support And Guidance You Need To Be A Success At Understanding Waste Management. This Book Is One Of The Most Valuable Resources In The World When It Comes To The Truth about Environment, Waste and Landfills.

Get My Free Ebook


Post a comment