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Silica fouling in coal seam gas water reverse osmosis desalination

Version 2 2024-06-05, 04:19
Version 1 2017-09-27, 12:19
journal contribution
posted on 2024-06-05, 04:19 authored by L Lunevich, P Sanciolo, Nick MilneNick Milne, SR Gray
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.

History

Journal

Environmental science: water research and technology

Volume

3

Pagination

911-921

Location

Cambridge, Eng.

ISSN

2053-1400

eISSN

2053-1419

Language

eng

Publication classification

C Journal article, C1 Refereed article in a scholarly journal

Copyright notice

2017, The Royal Society of Chemistry

Issue

5

Publisher

Royal Society of Chemistry