Membrane separation

"Filtration Spectrum" shows how membrane technology allows separation of very small substances (molecules), which dimension can be measured in Angstrom (10-10 m).
Filtration will be determined combining membrane porosity and characteristics of the solution to be treated. Membrane filtration can be divided into the following cathegories:

Differences among membrane types generate both from membrane porosity and from chemical characteristic of the material: obviously reverse osmosis membranes have smaller pores. To understand these dimensions we may consider that enlarging a m2 of membrane to the size of Pacific Ocean, reverse osmosis' pores would be the size of a coin and ultrafiltration's the size of a compact disc.


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