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LALI PDF DL-EDL - DIALYSIS and ELECTRODIALYSIS Maretva...

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1 DIALYSIS and ELECTRODIALYSIS Maretva Baricot Ronnie Juraske Course: Membrane Separations December, 2003
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2 Dialysis What is dialysis? Dialysis is a membrane process where solutes ( MW~<100 Da) diffuse from one side of the membrane (feed side) to the other (dialysate or permeate side) according to their concentration gradient. First application in the 70 ’s . General Principles Separation between solutes is obtained as a result of differences in diffusion rates. These are arising from differences in molecular size and solubility. This means that the resistance increases with increasing molecular weight.
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3 Dialysis A typical concentration profile for dialysis with boundary layer resistences contains low-molecular-weight solute, A intermediate size molecules, B , and a colloid, C
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