Electrolyte-induced solute permeability effects in compacted smectite membranes

Citation data:

Applied Geochemistry, ISSN: 0883-2927, Vol: 9, Issue: 5, Page: 533-546

Publication Year:
1994
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Citations 57
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Repository URL:
http://scholarsmine.mst.edu/geosci_geo_peteng_facwork/1110
DOI:
10.1016/0883-2927(94)90015-9
Author(s):
Whitworth, Thomas M.; Fritz, Steven J.
Publisher(s):
Elsevier BV; Elsevier
Tags:
Environmental Science; Earth and Planetary Sciences; Aquifers; Effluents; Electrolytes; Filtration; Mechanical Permeability; Polarization; Rocks; Concentration Polarization Layer; Electrolyte Flux; Geological Basin; Smectite Membranes; Clay Minerals; Electrolyte Flux; Membranes; Aquifers; Effluents; Electrolytes; Filtration; Mechanical Permeability; Polarization; Rocks; Concentration Polarization Layer; Electrolyte Flux; Geological Basin; Smectite Membranes; Clay Minerals, Electrolyte Flux; Membranes; Geology
article description
Experiments suggest that increasing electrolyte flux into a compacted smectite membrane may result in greater permeability of the membrane to the electrolyte. The influx of electrolyte into the membrane pores decreases the double layer thickness, therefore reducing the clay's ability to exclude anions. As a result, solute previously accumulated in the concentration polarization layer (CPL) may be able to dissipate through the membrane, producing a temporary situation where the effluent is more concentrated than the feed solution. Of course, at some juncture the CPL will diminish sufficiently so that the effluent concentration will be the same as that of the feed solution and a true state will be reached.