Creat membership Creat membership
Sign in

Forgot password?

Confirm
  • Forgot password?
    Sign Up
  • Confirm
    Sign In
Creat membership Creat membership
Sign in

Forgot password?

Confirm
  • Forgot password?
    Sign Up
  • Confirm
    Sign In
Collection
For ¥0.57 per day, unlimited downloads CREATE MEMBERSHIP Download

toTop

If you have any feedback, Please follow the official account to submit feedback.

Turn on your phone and scan

home > search >

Mathematical modeling of nanofiltration membranes with mixed electrolyte solutions

Author:
Garcia-Aleman, J  Dickson, JM  


Journal:
JOURNAL OF MEMBRANE SCIENCE


Issue Date:
2004


Abstract(summary):

A one-dimensional mathematical model is developed and used to describe and predict the performance of commercial nanofiltration (NF) membranes (DDS HC-50, Hydranautics HN-4040-TFV-7450, FilmTec NF-45) for mixed electrolyte solutions. The model is based on three fundamental ideas: the extended Nernst-Planck equation, Donnan equilibrium model, and Gouy-Chapman theory. The membrane is characterized using only three fitting parameters (L-p, r(p), Phi). Two solutions (flat and cylindrical surface) of the Gouy-Chapman equation (GCE) are used and compared. The pure water permeability (Lp) is obtained experimentally (independently). The pore radius (rp) and surface electrical potential (Phi) are fitted simultaneously to experimental data from mixed electrolyte solutions, and the ratio of membrane thickness/water content (lambda/E) is calculated from Darcy's law. The parameters are independent of operating conditions (solute, pressure, and concentration). Model calculations are in agreement with the experimental data, especially when a cylindrical surface (GCE) is assumed. At very low concentrations the flat surface assumption is unsatisfactory. This mechanistic model has good predicting capabilities. The fitted parameters are compared to independently measured parameters from the literature. (C) 2004 Elsevier B.V. All rights reserved.


Page:
1---13


VIEW PDF

The preview is over

If you wish to continue, please create your membership or download this.

Create Membership

Similar Literature

Submit Feedback

This function is a member function, members do not limit the number of downloads