Reverse Osmosis Separation of NaCl using a Bentonite Membrane
The results of 11 experiments using compacted bentonite membranes in a cross-flow experimental cell equipped with a piston to maintain clay membrane compaction are reported. Due to dispersion in the porous frit, solute concentration buildup adjacent to the membrane was not a problem at the flow rates used in these experiments (6 to 126 mL/hr). The solute rejection efficiency of the bentonite membrane decreased with increasing solution concentration. The rejection efficiency for the 0.5-mm thick membrane ranged from 68% of Cl- for 100-mM (3545 ppm) NaCl solution to 13% of Cl - for 2300-mM (81,542 ppm) NaCl solution. The membrane exhibited stable solute rejection.
T. M. Whitworth et al., "Reverse Osmosis Separation of NaCl using a Bentonite Membrane," Separation Science and Technology, vol. 38, no. 16, pp. 4009-4025, Taylor & Francis, Jan 2003.
The definitive version is available at http://dx.doi.org/10.1081/SS-120024716
Geosciences and Geological and Petroleum Engineering
Keywords and Phrases
Brine; Clay; Membrane; Reverse Osmosis; Compaction; Sodium Chloride; Solute Rejection; Separation; Chloride
International Standard Serial Number (ISSN)
Article - Journal
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