Abstract
Diffusive transport of neutral and charged solutes across a nanoporous alumina membrane (NPAM) with a pore size of 24 nm and interpore distance of 65 nm obtained by the two-step anodization method in sulphuric acid solution (Sf/NPAM sample) is studied. Diffusion experiments were performed with tritiated water (neutral solute) to demonstrate frictional effects, while charged solute measurements (NaCl solutions at different concentration gradients and 22Na radiotracer) allow us to estimate also the contribution of electrical interactions in the movement of ionic species in the charged membrane nanopores as well as electrolyte/membrane interface effects. Values for water, NaCl, and Na+ diffusion coefficients in the membrane were determined from these measurements as well as the electropositive character of the Sf/NPAM sample and its fixed charge concentration by analyzing the diffusion–concentration curve. According to these results, ion-pore wall frictional and electrical effects are both involved in the re...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
