Silica fouling in coal seam gas water reverse osmosis desalination

Lunevich, L., Sanciolo, P., Milne, N. and Gray, S.R. 2017, Silica fouling in coal seam gas water reverse osmosis desalination, Environmental science: water research and technology, vol. 3, no. 5, pp. 911-921, doi: 10.1039/c7ew00128b.

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Title Silica fouling in coal seam gas water reverse osmosis desalination
Author(s) Lunevich, L.
Sanciolo, P.
Milne, N.ORCID iD for Milne, N.
Gray, S.R.
Journal name Environmental science: water research and technology
Volume number 3
Issue number 5
Start page 911
End page 921
Total pages 11
Publisher Royal Society of Chemistry
Place of publication Cambridge, Eng.
Publication date 2017-09-01
ISSN 2053-1400
Keyword(s) Science & Technology
Life Sciences & Biomedicine
Physical Sciences
Engineering, Environmental
Environmental Sciences
Water Resources
Environmental Sciences & Ecology
Summary Silica fouling was studied in RO desalination of high salinity (30-60 g L -1 as NaCl) coal seam gas (CSG) water for a range of silica concentrations, pH conditions and dissolved aluminium concentrations. Silica fouling patterns and the effect of various residual dissolved aluminium concentrations on silicate scale formation were recorded. The permeate flux decline data collected during each RO experiment showed that the deposition of the foulant layer on the membrane surface formed much faster in higher salinity and higher silica concentration water (∼50 mg L -1 ) in the presence of elevated concentrations of dissolved aluminium (7.4-27.7 mg L -1 ). It was found that the presence of elevated concentrations of dissolved aluminium reduces silica solubility to as low as 60-48 mg L -1 , leading to rapid aluminium-silicate deposition on the RO membrane surface. A mechanism of aluminium silica formation is discussed.
Language eng
DOI 10.1039/c7ew00128b
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2017, The Royal Society of Chemistry
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