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Effect of induced electric field on single-file reverse osmosis M. E. Suk and N. R. Aluru*
 

Summary: Effect of induced electric field on single-file reverse osmosis
M. E. Suk and N. R. Aluru*
Received 19th February 2009, Accepted 2nd June 2009
First published as an Advance Article on the web 22nd July 2009
DOI: 10.1039/b903541a
We investigated the effect of the electric field on single-file reverse osmosis (RO) water flux using
molecular dynamics simulations. The electric field is generated by introducing oppositely charged
biomolecules to the salt solution and pure water chambers attached to the nanopore. Simulation
results indicate that an electric field in the direction of RO enhances the water flux while in the
direction opposite to RO it suppresses the water flux. When the RO water flux is enhanced, the
single-file water dipoles are aligned in the direction of the electric field. The addition of an electric
field in the direction of RO led to a flux of 3 water molecules nsĄ1
by constantly maintaining
water dipole vectors in the direction of the electric field, and this water flux is superimposed on
the pressure driven water flux.
I. Introduction
Water shortage is a global issue that is of utmost importance
to both developing and developed nations.1
A recent review by
Shannon et al.2

  

Source: Aluru, Narayana R. - Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign

 

Collections: Engineering; Materials Science