Reverse osmosis membranes prepared from potassium peroxydisulphate-modified poly(vinyl alcohol)

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dc.contributor.authorBezuidenhout D.
dc.contributor.authorHurndall M.J.
dc.contributor.authorSanderson R.D.
dc.contributor.authorVan Reenen A.J.
dc.date.accessioned2011-05-15T15:59:08Z
dc.date.available2011-05-15T15:59:08Z
dc.date.issued1998
dc.description.abstractPoly(vinyl alcohol)(PVAL) was modified and insolubilized by reaction with potassium peroxydisulphate (K2S2O8) and used to make reverse osmosis (RO) membranes on tubular poly(arylether sulphone) (PES) ultrafiltration (UF) substrates. Prior to making the membranes, aqueous solutions of PVAL and K2S2O8 were aged. The effects of soltuion maturation times on the salt retentions and permeate fluxes of the resultant membranes were determined. Increased maturation times were found to lead to membranes with higher salt retentions. The K2S2O8-crosslinked PVAL membranes were also tested with an industrial effluent. Changes which took place in the maturing PVAL/K2S2O8 solutions were characterized by viscometry, UV spectroscopy, 1H- and 13C-NMR spectroscopy, and pH measurements. Only the most important result sof these analyses are reported here.Poly(vinyl alcohol) (PVAL) was modified and insolubilized by reaction with potassium peroxydisulphate (K2S2O8) and used to make reverse osmosis (RO) membranes on tubular poly(arylether sulphone) (PES) ultrafiltration (UF) substrates. Prior to making the membranes, aqueous solutions of PVAL and K2S2O8 were aged. The effects of solution maturation times on the salt retentions and permeate fluxes of the resultant membranes were determined. Increased maturation times were found to lead to membranes with higher salt retentions. The K2S2O8-crosslinked PVAL membranes were also tested with an industrial effluent. Changes which took place in the maturing PVAL/K2S2O8 solutions were characterized by viscometry, UV spectroscopy, 1H- and 13C-NMR spectroscopy, and pH measurements. Only the most important results of these analyses are reported here.
dc.description.versionArticle
dc.identifier.citationDesalination
dc.identifier.citation116
dc.identifier.citation1
dc.identifier.issn119164
dc.identifier.other10.1016/S0011-9164(98)00055-1
dc.identifier.urihttp://hdl.handle.net/10019.1/11021
dc.subjectCrosslinking
dc.subjectNuclear magnetic resonance spectroscopy
dc.subjectpH
dc.subjectPolymeric membranes
dc.subjectPolyvinyl alcohols
dc.subjectPotassium compounds
dc.subjectReverse osmosis
dc.subjectSalts
dc.subjectSolutions
dc.subjectUltrafiltration
dc.subjectUltraviolet spectroscopy
dc.subjectViscosity measurement
dc.subjectPotassium peroxydisulphate
dc.subjectOsmosis membranes
dc.subjectmembrane
dc.subjectreverse osmosis
dc.titleReverse osmosis membranes prepared from potassium peroxydisulphate-modified poly(vinyl alcohol)
dc.typeArticle
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