Silica fouling in high salinity waters in reverse osmosis desalination (sodium-silica system)

Lunevich, L., Sanciolo, P., Dumee, L.F. and Gray, S.R. 2016, Silica fouling in high salinity waters in reverse osmosis desalination (sodium-silica system), Environmental science : water research & technology, vol. 2, no. 3, pp. 539-548, doi: 10.1039/c6ew00065g.

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Title Silica fouling in high salinity waters in reverse osmosis desalination (sodium-silica system)
Author(s) Lunevich, L.
Sanciolo, P.
Dumee, L.F.ORCID iD for Dumee, L.F.
Gray, S.R.
Journal name Environmental science : water research & technology
Volume number 2
Issue number 3
Start page 539
End page 548
Total pages 10
Publisher Royal Society of Chemistry
Place of publication Cambridge, Eng.
Publication date 2016
ISSN 2053-1400
Keyword(s) science & technology
life sciences & biomedicine
physical sciences
engineering, environmental
environmental sciences
water resources
environmental sciences & ecology
Summary Silica fouling patterns in a sodium–silica system and the effect of pH on residual dissolved silica concentrations are reported. The unique chemical affinity between sodium and silica (SO4) prevented silica scale deposition on the membrane surface during reverse osmosis (RO) desalination. It was found that high concentrations of sodium in solutions depressed silica solubility to 81–84 mg L−1 for a maximum NaCl salinity of 60–65 g L−1. Using a range of membrane examination techniques, it was found that no silica scale formed on the RO membrane surfaces from NaCl solutions free from cations such as Ca, Al and Fe. This was considered to be the result of sodium ions acting as a barrier between polymeric silica and the membrane surface.
Language eng
DOI 10.1039/c6ew00065g
Field of Research 090410 Water Treatment Processes
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Royal Society of Chemistry
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