Abstract
Nanofiltration rejection measurements have been performed for KCl solutions to characterize a non-commercial NF membrane. Membrane Potential (MP) and Tangential Streaming Potential (TSP) measurements have also been carried out for a wide range of concentrations. The charge of the membrane and the pore dielectric constant has been obtained as functions of the salt concentration from these three ensembles of experiments, showing a fair agreement. For the data treatment, two modifications of the Steric Electric and Dielectric Exclusion (SEDE) model have been proposed to allow the electrical characterization of the NF membrane: (1) the volumetric charge density is considered to change along the pores by means of the inclusion of a charge isotherm (which correlates the membrane charge with the ion concentration) in the transport equations, and (2) the porous support is considered by the inclusion of the adequate transport equations similarly to how the active layer is considered.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.