PVDF超滤膜的表征及处理造纸废水的过滤特性

37220153JOUＲNALOFNANJINGTECHUNIVEＲSITYNaturalScienceEditionVol．37No．2Mar．2015doi10．3969/j．issn．1671－7627．2015．02．008GO/PVDF2100092014－02－202013BAE11B0111KJB5300051988—[e-mail]．．GO/PVDFJ．201537239－44．GOPVDFGO/PVDF。GO。2%GO63.1°BSA595121L/m2·hBSA74%BSA55%96%。12μm0.15、0.30.55μm。TQ028.81671－7627201502－0039－06CharacterizationofGO/PVDFultrafiltrationmembraneandfiltrationbehaviorinpapermakingwastewatertreatmentHONGJinchengLIWeixingXINGWeihongStateKeyLaboratoryofMaterials-OrientedChemicalEngineeringNanjingTechUniversityNanjing210009ChinaAbstractGrapheneoxideGOblendedpolyvinylidenefluoridePVDFmembraneswereexploredtoinvestigatethefiltrationbehaviorandresistancedistribution．Papermakingwastewaterwastreatedwiththemembranesinvariousmeanporesizes．Ｒesultsshowedthatthehydrophilicityanti-foulingpropertyandthermostabilitywereenhancedwiththeincreaseofGOdosage．WhenthecontentofGOwas2%thecontactangleofthemembranewas63.1°purewaterfluxandbullserumalbuminBSAfluxwere595and121L/m2·hrespectively．TheretentionofthemembranetowardsBSAsolutionwas74%．ThesurfacedepositionresistancewasdominantduringBSAsolutionfiltrationandtherecoveryratioofpurewaterfluxofthecontaminatedmembranewassmallerthan55%afterphysicalcleaning．Howeverthefigurewasabove96%afterchemicalcleaning．Duringpapermakingwastewatertreatmentthefluxofmembraneswithlargemeanporesizes1and2μmdecreaseddramaticallybecauseofporeblocking．Owingtoenhancedanti-foulingabilitythestablefluxofmembraneswithsmallerones0.150.3and0.55μmincreasedwithincreasingmeanporesizes．Keywordspolyvinylidenefluorideultrafiltrationmembranegrapheneoxidepapermakingwastewater、、、、。PVDFC—F、12－4。PVDFPVDF5－6。Venault7PS-b-PEGMAPVDF/PS-b-PEGMABSA65%89%。Zhang8SiO2PSNTsPSNTs/PVDF。GO—COOH—OH。Xu9GOGO/PVDF。、。GOGO/PVDFGO/PVDF。11.1GO/PVDFBSA67000COD。1.21。。1.3CODHACHDＲ2800HACH2100CODDDS-307ADSA100pHMP511。1Fig．1Schematicdiagramofdead-endfiltrationdeviceSEMHITACHITM300060sA235118。1.4BSA-BSA-278nmA278BSA-y=1.3813x－0.015Ｒ2=0.99963。22.1GO/PVDFGO0、0.5%、1%2%M0、M0.5、M1M2。、1。1GOGO02%300nm110nmGO。1GO/PVDFTable1ParametersofGO/PVDFmembranes/nm/nm/L·m－2·h－1M0300110261M0.5140100300M1120110500M211011059504372.2GO2GO0、0.5%、1%2%。2GOGO2%63.1°。—OH—COOH。2GOPVDFFig．2EffectsofcontentofGOonhydrophylicityofPVDFmembrane2.3GOM0、M0.5、M1M23。3M0GO/PVDFM0.5～M2350℃GO750℃GOGO3GOM2、M1、M0.5、M0GO。2.4GOGO4。4GOGO。GOWang10。2.5GO/PVDFBSA25℃0.5g/LBSA-278nm1Ｒ。3GO/PVDFFig．3TGcurvesofGO/PVDFmembranesＲ=1－ρ1ρ()0×100%1ρ0ρ1BSA。0.5g/LBSAGO/PVDF2。2GOBSAM2BSA121L/m2·h。BSA。M0～M2BSAM0～M255%。96%。GOBSAGO2%74.0%GO。2.6GO/PVDFBSA。Ｒm、Ｒf、Ｒbl。J=ΔpμＲt=ΔpμＲm+Ｒbl+Ｒf2Ｒm=ΔpiμJiw3Ｒf=ΔpibμJib－Ｒm4142GO/PVDF4SEMFig．4SEMimagesofsamplesＲbl=ΔpμJ－Ｒm－Ｒf5JΔpμＲtΔpi、JiwΔpib、Jib。2GO/PVDFTable2PermeationparametersofGO/PVDFmembranes/L·m－2·h－1/L·m－2·h－1/L·m－2·h－1/%M05412025155.4M0.57013828969.8M111125049372.5M212132558374.0M0～M23。3GO/PVDFTable3ＲesistancedistributionofGO/PVDFmembrane/%M024.320.155.6M0.527.323.449.3M136.814.149.1M222.015.762.33M0～M2BSAGOGO2437BSA。GO2%BSA。2.7ＲOＲO。GO2%、0.15、0.3、0.55、12μmGO/PVDF。2.7.111.6cm20.03MPa2h0.15、0.3、0.55、12μmUF5。。5Fig．5EffectsofporesizesonUFwastewatertreatment52h12μm273.8%80.5%。。3。228、264275L/m2·h。2.7.2ＲO6ＲO11.6cm20.15、0.3、0.55、12μm。6ＲOFig．6EffectsofporesizesonＲOⅠwastewatertreatment62h12μm59.3%44.3%。0.15、0.30.55μm。0.55μm269L/m2·h。2.7.3ＲO7ＲO11.6cm20.15、0.3、0.55、12μm。7ＲOFig．7EffectsofporesizesonＲOⅡwastewatertreatment7ＲO12μm2。2μm25min362L/m2·h242L/m2·h33%1μm317L/m2·h217L/m2·h31.55%。342GO/PVDF155165L/m2·h57.2%47.9%0.55μm231L/m2·h47.95%0.3μm231L/m2·h0.15μm187L/m2·h。ＲO。3GO/PVDF。GO。2%GO63.1°BSA595121L/m2·hBSA74%。55%96%。12μm0.15、0.30.55μm。1LiuFHashimNALiuYTetal．ProgressintheproductionandmodificationofPVDFmembranesJ．JMembrSci20113751－27．2VenaultAChangYYangHSetal．Surfaceself-assembledzwitterionizationofpolyvinylidenefluoridemicrofiltrationmembranesviahydrophobic-drivencoatingforimprovedbloodcompatibilityJ．JMembrSci2014454253－263．3ShiFMMaYXMaJetal．PreparationandcharacterizationofPVDF/TiO2hybridmembraneswithionicliquidmodifiednano-TiO2particlesJ．JMembrSci2013427259－269．4ZhaoZZhengJWangMetal．HighperformanceultrafiltrationmembranebasedonmodifiedchitosancoatingandelectrospunnanofibrousPVDFscaffoldsJ．JMembrSci2012394－395209－217．5YaoLZhangLZWangＲetal．FabricationofcatalyticmembranecontactorsbasedonpolyoxometalatesandpolyvinylidenefluorideintendedfordegradingphenolinwastewaterundermildconditionsJ．SepPurifTechnol2013118162－169．6PslaruEBaicanMCHitrucEGetal．ImmunoglobulinGimmobilizationonPVDFsurfaceJ．ColloidsSurfBBiointerfaces2014115139－149．7VenaultALiuYHWuJＲetal．Low-biofoulingmembranespreparedbyliquid-inducedphaseseparationofthePVDF/polystyrene-b-polyethyleneglycolmethacrylateblendJ．JMembrSci2014450340－350．8ZhangSMWangＲSZhangSFetal．TreatmentofwastewatercontainingoilusingphosphorylatedsilicananotubesPSNTs/polyvinylidenefluoridePVDFcompositemembraneJ．Desalination2014332109－116．9XuZWZhangJGShanMJetal．Organosilane-functionalizedgrapheneoxideforenhancedantifoulingandmechanicalpropertiesofpolyvinylidenefluorideultrafiltrationmembranesJ．JMembrSci20144581－13．10WangZHYuHＲXiaJFetal．NovelGO-ble