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Silica fouling in coal seam gas water reverse osmosis desalination
journal contribution
posted on 2017-09-01, 00:00 authored by L Lunevich, P Sanciolo, Nick MilneNick Milne, S R GraySilica 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 technologyVolume
3Issue
5Pagination
911 - 921Publisher
Royal Society of ChemistryLocation
Cambridge, Eng.Publisher DOI
ISSN
2053-1400eISSN
2053-1419Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2017, The Royal Society of ChemistryUsage metrics
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No categories selectedKeywords
Science & TechnologyTechnologyLife Sciences & BiomedicinePhysical SciencesEngineering, EnvironmentalEnvironmental SciencesWater ResourcesEngineeringEnvironmental Sciences & EcologyAQUEOUS-SOLUTIONSOLUBILITY BEHAVIORALUMINUM(III)EQUILIBRIUMSILICON(IV)PRECIPITATION25-DEGREES-CPREDICTIONSCONSTANTSSODIUM
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