A new research paper, which is now available through open access, has been published in Desalination. The paper was written by an international consortium of authors from the Netherlands (Wetsus, University of Twente), Russia (Institute of Computational Modelling SB RAS), Poland (Wroclaw University of Science and Technology) and the USA (Yale University). The researchers present a novel equation for salt flux that we derive from the full solution-friction (SF) theory. This equation interpolates between an equation for neutral membranes on the one hand, and an equation for highly-charged membranes on the other hand, and thus it is more generally applicable. This work directly relates to the debate over the actual mechanism of ion transport through membranes used in reverse osmosis (for more details, see a recently published paper by one of the co-authors. The paper can be accessed here.