Retentionoftoxicdyeswithmolecularweightslowerthanthemolecularweightcut-off(MWCO)ofthe ultrafiltration membranescanbeimprovedthroughselectivebindingofthetargetdyestoawater-so- luble polymer,followedbyultrafiltration ofthemacromolecularcomplexesformed.Thismethod,often referredtoaspolymerenhancedultrafiltration (PEUF),wasinvestigatedinthepresentstudy,using polyethyleneimine(PEI)asthechelatingagent.ModelazodyeReactiveRed120wasselectedasthe poorlybiodegradable,targetcontaminant,becauseofitsfrequentrecalcitrantpresenceincoloredef- fluents, anditseventualecotoxicologicalimpactsontheenvironment.Theeffectsofthegoverning process factors,namely,cross flow rate,transmembranepressurepolymertodyeratioandpH,ontarget dyerejectionefficiency weremeticulouslyexamined.Additionally,eachparameterlevelwasstatistically optimized usingcentralcompositedesign(CCD)fromtheresponsesurfacemethodology(RSM)toolkit, with anobjectivetomaximizeperformanceefficiency.Theresultsrevealedhighdyeretentionefficiency over99%,accompaniedwithreasonablepermeate flux over100L/m2 h underoptimalprocesscondi- tions. Theestimatedresultswereelucidatedgraphicallythroughresponsesurface(RS)plotsandvali- dated experimentally.TheanalysesclearlyestablishedPEUFasanovel,reasonablyefficient andeco- nomical routeforrecalcitrantdyetreatment.

Response surface-optimized removal of Reactive Red 120 dye from its aqueous solutions using polyethyleneimine enhanced ultrafiltration

Chakraborty S;CURCIO, Stefano
2015

Abstract

Retentionoftoxicdyeswithmolecularweightslowerthanthemolecularweightcut-off(MWCO)ofthe ultrafiltration membranescanbeimprovedthroughselectivebindingofthetargetdyestoawater-so- luble polymer,followedbyultrafiltration ofthemacromolecularcomplexesformed.Thismethod,often referredtoaspolymerenhancedultrafiltration (PEUF),wasinvestigatedinthepresentstudy,using polyethyleneimine(PEI)asthechelatingagent.ModelazodyeReactiveRed120wasselectedasthe poorlybiodegradable,targetcontaminant,becauseofitsfrequentrecalcitrantpresenceincoloredef- fluents, anditseventualecotoxicologicalimpactsontheenvironment.Theeffectsofthegoverning process factors,namely,cross flow rate,transmembranepressurepolymertodyeratioandpH,ontarget dyerejectionefficiency weremeticulouslyexamined.Additionally,eachparameterlevelwasstatistically optimized usingcentralcompositedesign(CCD)fromtheresponsesurfacemethodology(RSM)toolkit, with anobjectivetomaximizeperformanceefficiency.Theresultsrevealedhighdyeretentionefficiency over99%,accompaniedwithreasonablepermeate flux over100L/m2 h underoptimalprocesscondi- tions. Theestimatedresultswereelucidatedgraphicallythroughresponsesurface(RS)plotsandvali- dated experimentally.TheanalysesclearlyestablishedPEUFasanovel,reasonablyefficient andeco- nomical routeforrecalcitrantdyetreatment.
Molecular weightcut-off Polymer enhanced ultrafiltration Central composite design Response surface optimization Permeate flux
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11770/153458
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