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F

The best polymeric ultrafiltration membranes used (good photostability checked by SEM and TOC, acceptable values of wpf, rejection unfortunately negligible etc.):

¾ ¾ ¾

PAN (polyacrylonitrile) FS50PP (fluoride + polypropylene) GR51PP (polysulfone + polypropylene).

F

In order to improve the rejection effects, polymeric nanofiltration membranes were used in the systems 4a and 4b. The best ones were NF-PES-010 (more permeable, polyethersulfone, Hoechst) and N30F (less permeable, modified polysulphone, Hoechst).

F

The choice of the membrane depends on the size of the pollutants to be treated. pH can influence very strongly the rejection (Donnan Exclusion).

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