Marianne Nyström

TL;DR: In this article, the authors identify six challenges for nanofiltration where solutions are still scarce: avoiding membrane fouling, and possibilities to remediate, improving the separation between solutes that can be achieved, further treatment of concentrates, chemical resistance and limited lifetime of membranes, insufficient rejection of pollutants in water treatment, and the need for modelling and simulation tools.

TL;DR: The changes in permeabilities and retentions were found to be mostly reversible in the pH range studied (very slowly in some cases, however), and some membranes became significantly more open at high pH (i.e., flux increased).

TL;DR: The zeta potential along the surface and through the pores of a commercial nanofiltration membrane was studied with several electrolyte solutions to investigate the influence of salt type and pH on the charge of the membrane surface and in the membrane pores.

TL;DR: In this article, the fouling and retention of four different nanofiltration membranes (NF40, NTR-7450, NM-7410 and NM-7250) were followed using different model substances, and it could be seen that multivalent salts were retained better than small organic substances.

TL;DR: In this article, the theory of ultrasound-induced effects, apparatuses used in ultrasound-aided membrane filtration, effects of different process parameters on flux and effects of ultrasound irradiation on membranes.