Theoretical performance of nanofiltration membranes for wastewater treatment
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Abstract
Description
Mechanisms of ionic transport in nanofiltration
are poorly known. Modelling can be used to predict
membrane performance, to reveal separation mechanisms,
to select appropriate membranes, and to design processes.
Several models have been proposed to describe nanofiltration
membranes. Some models rely on simple concepts,
while other models are more complex and require sophisticated
solution techniques. Here, we review predictive
models used for characterizing nanofiltration membranes
for the separation of wastewater. The most popular model
uses the extended Nernst–Planck equation, which describes
the ionic transport mechanisms in details. Results obtained
by using the extended Nernst–Planck equation show that
the performance of nanofiltration membranes is strongly
dependent on charge, steric, and dielectric effects.
Keywords
T Technology (General), TP Chemical technology