Osmosis and reverse osmosis in solutions: Monte Carlo simulations and van der Waals one-fluid theory

Murad, S. and Powles, J.G and Holtz, B. (1995) Osmosis and reverse osmosis in solutions: Monte Carlo simulations and van der Waals one-fluid theory. Molecular Physics, 86 (6). pp. 1473-1483. ISSN 0026-8976. (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.1080/00268979500102861

Abstract

Osmosis and reverse osmosis in solutions have been studied by computer simulations using the Gibbs ensemble Monte Carlo technique, and by using the equation of state method and the van der Waals one-fluid (vdW1) approximation. Representative solutions have been studied over a wide concentration range, so that both osmosis and reverse osmosis, as well as a transition between the two are observed. Properties investigated include the osmotic pressure, the solvent molecule exchange, and the chemical potential. The results show very clearly that vdW1 is a powerful theory for the systems studied here, and with just a few exceptions was found to be quite accurate. In addition, the osmotic pressure results are compared with the well known van't Hoff approximation, and found to do very well for modelling even quite high concentrations of almost ideal mixtures, but not that well for non-ideal mixing in solutions. Finally, the results show that even in the simpler systems studied, reverse osmosis can take place at a significant level. This confirms the promise of reverse osmosis as an efficient separation technique, as well as the viability of molecular simulation methods to study this important phenomenon.

Item Type: Article
Subjects: Q Science > QD Chemistry
Q Science > QC Physics
Divisions: Faculties > Science Technology and Medical Studies > School of Biosciences
Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: O.O. Odanye
Date Deposited: 03 Jun 2009 08:49
Last Modified: 03 Jun 2009 08:49
Resource URI: http://kar.kent.ac.uk/id/eprint/19400 (The current URI for this page, for reference purposes)
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