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| 2. |
- Nyström, Marianne, et al.
(författare)
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NF retention and critical flux of small hydrophilic/hydrophobic molecules
- 2004
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Ingår i: Membrane Technology. - 0958-2118 .- 1873-4049. ; 10, s. 5-8
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Tidskriftsartikel (refereegranskat)abstract
- This feature article provides details of a study in which small molar mass substances were used as model substances in nanofiltration using NF-270 and Desal-5 DL membranes. The hydrophobicities of the substances were calculated, and flux, retention and critical flux were measured for the filtration and related to flow conditions and characteristics of model compounds and membranes.
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| 3. |
- Platt, Samantha, et al.
(författare)
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Retention of pegs in cross-flow ultrafiltration through membranes
- 2002
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Ingår i: Desalination. - 0011-9164 .- 1873-4464. ; 149:1-3, s. 417-422
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Tidskriftsartikel (refereegranskat)abstract
- This work investigated the difference between membrane cut-offs measured with the CHARMME methods and the values quoted from the manufacturers. Four different membranes were characterised. The two regenerated cellulose membranes that according to the manufacturers had cut-offs of 5 and 10 kD had, in fact, the same cut-off of 2.5 kD. It was also found that the polyethersulfone membrane had a lower cut-off (3 kD) than that stated by the membrane manufacturers (5 kD). A cross-flow velocity of 2 m/s and a flux of 40 1/h/m2 was found to keep the mass transfer coefficient within a tolerable range for all PEGs used.
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