Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 369, Issue 1-2, Pages 290-298Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2010.12.005
Keywords
RO; Rejection; Pore radius; Molecular shape; Pressure effect
Categories
Funding
- New Energy and Industrial Technology Development Organization (NEDO) of Japan
Ask authors/readers for more resources
The pore radius of a reverse osmosis membrane was evaluated by considering the molecular shape of uncharged organic solutes. Molecular shape was approximated by a rectangular parallelepiped; molecular length (L) and molecular width (MWd) were used as shape parameters. The steric partition factor of a solute was calculated from L and MWd, and the Stokes radius and diffusivity were estimated from MWd. Twenty-four alcohols and polyhydric alcohols were used as probe solutes, and pore radius was estimated by both non-spherical and spherical models: a uniform pore-size model was used. The non-spherical model gave better correspondence between calculated and observed rejections for ES10 membrane, and the calculated pore radius (0.506 nm) was larger than that obtained by the spherical model (0.301 nm). The effect of applied pressure (0.2-1.0 MPa) on the pore radius was examined with the non-spherical model. The results indicated that the pore radius slightly increased with applied pressure, suggesting that the pore was slightly enlarged by increasing the applied pressure. (C) 2010 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available