固定化酵母菌纳米TiO2复合省略Cr3Pb2吸附性能研究赵妍

、、。。、100mg·L-1[1]。、、。、[2-4]。TiO2、、[5-7]。TiO2TiO2、PVA。、pHNi2+、Cr3+、Pb2+。11.1、、、、、、、PVA、、、、、、、、、、。1.2LD4-2BS-1ESW-CJ-2FDF-204pHPHS-3BCJJ78-110mLYB202SP-721(E)TGL-16G0.22μm。1.3TiO230minA、、BA10sB30min100℃4h、TiO2Ni2+Cr3+Pb2+130022TiO2XRD、TEM、Ni2+、Cr3+、Pb2+。TiO21%、1%2%Pb2+、Ni2+、Cr3+90.25%、80.73%79.33%Pb2+、Ni2+、Cr3+pH5.0、6.0、5.035、35、30℃60、50、40min。1mol·L-192.1%。TiO2TQ424A1000-3770(2011)[e-mail]3711201111TECHNOLOGYOFWATERTREATMENTVol.37No.11Nov.,201138DOI:10.16796/j.cnki.1000-3770.2011.11.009500℃2hTiO2。1.428℃18h6000r·min-160℃、。pH=5.5100mgTiO240min0.22μm、TiO2。60℃。1.5。、PVATiO24%CaCl24h[8]。1.6l00.0mLNi2+、Cr3+、Pb2+l0000r·min-1A100.0mL40minBA、BNi2+、Cr3+、Pb2+。Q=(ρ0-ρe)V/m1T=ρrV/Qr×100%2ρ0Ni2+、Cr3+、Pb2+ρeNi2+、Cr3+、Pb2+VmρrNi2+、Cr3+、Pb2+QrNi2+、Cr3+、Pb2+。22.1TiO2XXRDTiO21。CuKα40kV30mA。JCPDSFileTiO225.3°、37.8°、48.0°、54.4°、56.1°、62.9°76.1°。1TiO2TiO2。TEM10nm。2.22。23407.98cm-1O－HN－HO－HN－H2925.81cm-1C－H1649.02cm-11535.23cm-1IC=OIIN=HC=N2[9]1238.21cm-11045.35cm-1IICOO－1045.35cm-1C－OHP－O－C。、、、[10]。TiO23200～3500cm-1O－HN－H3419.56cm-1TiO2[11]2923.88cm-11394.44cm-1I7.71cm-1C－H、COO－C=OTi4+TiO2[11-12]。1TiO2XFig.1XRDpatternsofnanoTiO2010203040506070809002004006008001000120014001600
2
2ATiO2BFig.2IRspectraofyeast(A)andnanoTiO2-yeastcompositeadsorbent(B)40003500300025002000150010005003035404550556065
%cm、TiO2Ni2+Cr3+Pb2+391045.35cm-11047.27cm-1TiO2TiO2。2.32.3.1Pb2+、Ni2+、Cr3+10mL1000mg·L-1Pb(NO3)2、Ni(NO3)2Cr(NO3)35250mL100mLpH5～6。30℃180r·min-1250。-Pb2+580nm。Ni2+14530nm。Cr3+-。3540nm。Pb2+、Ni2+、Cr3+1。3PVAPVATiO2TiO2。。TiO2TiO2。C=O、C－N、C－O、N－H、O－HTiO2Ti、、、[13-14]。TiO2TiO2。TiO2－TiOHTiO-、[15]。2.3.2pHPb2+、Ni2+、Cr3+25mL。pH2.5、3.0、3.5、4.0、4.5、5.0、5.5、6.010g·L-1TiO230℃pH1h。pH。pH3。3pH5.0、6.0、5.0Pb2+、Ni2+、Cr3+。pHpH4.5～5.5。2.3.3pH=530℃4。410minCr3+、Ni2+、Pb2+40、50、60min。2.02.53.03.54.04.55.05.56.06.560708090100
%pH3pHPb2+、Ni2+、Cr3+Fig.3EffectofpHvalueontheadsorptionrateofPb2+,Ni2+,Cr3+2%+1%1%+1%+2%PVA1%+1%+2%PVA+1%+1%+2%PVA+TiO236.9131.5382.0890.25135.6528.8577.6480.7334.2826.5475.6279.33/%Pb2+Ni2+Cr3+1Pb2+、Ni2+、Cr3+Tab.1AdsorptionrateofdifferentadsorbentsonPb2+,Ni2+,Cr3+4Pb2+、Ni2+、Cr3+Fig.4EffectofadsorptiontimeontheadsorptionrateofPb2+,Ni2+,Cr3+0204060801001200102030405060708090100
%
min371140。TiO2、－OH[16]、。2.3.41h10g·L-1pH525、30、35、40、45℃Pb2+、Ni2+、Cr3+35、35、30℃。。40℃。2.4Pb2+、Ni2+、Cr3+pH=5100mLHCl、HNO3、NaOH2。、NaOH1mol·L-1。H+[17]。3TiO2Pb2+、Ni2+、Cr3+、。1%、1%、2%PVAPb2+、Ni2+、Cr3+90.25%、80.73%79.33%。pH4.5～5.5Pb2+、Ni2+、Cr3+60、50、40min35、35、30℃40℃。Pb2+、Ni2+、Cr3+1mol·L-192.1%。。[1],.[J].,2004,14(1):15-19.[2]WangJL.Biosorptionofcopper()bychemicallymodifiedbiomassofsaccharomycescerevisia[J].ProcessBiochemistry,2002,37(8):847-850.[3]HanRP,LiHK,LiYH,etal.Biosorptionofcopperandleadionsbywastebeeryeast[J].JournalofHazardMater,2006(B137):1569-1576.[4],.Cr()[J].,2009,3(3):489-492.[5]JanuszW,MatysekM.CoadsorptionofCd()andoxalateionsattheTiO2/electrolytesolutioninterface[J].JournalofColloidandInterfaceScience,2006,296:22-29.[6]ChenJunshui,LiuMeichuan,ZhangLi,etal.ApplicationofnanoTiO2towardspollutedwatertreatmentcombinedwithelectrophotochemicalmethod[J].WaterResearch,2003,37:3815-3820.[7],,,.TiO2[J].,2010,47(2):42-45.[8].[D].:,2007.[9],,,.[J].,2004,22(16):777-779.[10],,,.[J].,2006,26(12):2334-2337.[11]NguyenVNH,AmalR,BeydounD.Effectofformateandmethanolonphotoreduction/removaloftoxiccadmiumionsusingTiO2semiconductorasphotocatalyst[J].ChemicalEngineeringScience,2003,58:4429-4439.[12],,.TiO2[J].,2003,26(4):742-746.[13]ChienSH,KuoMC,LuCH,etal.SpectroscopicstudiesofNOreductiononPt/TiO2catalysts[J].CatalysisToday,2004(97):121-127.[14]OlivaFY,AvalleLB,CámaraOR,etal.Adsorptionofhumanserumalbumin(HSA)ontocolloidalTiO2particles[J].JournalofColloidandInterfaceScience,2003,261:299-311.[15]KimMS,HongKM,ChungJG.RemovalofCu()fromaqueoussolutionsbyadsorptionprocesswithanatase-typetitaniumdioxide[J].WaterResearch,2003(37):3524-3529.[16],,,.、TiO2Cu2+[J].,2008,53(4):400-406.[17],,,.Pb2+[J].,2009,32(1):160-164.HCl0.5mol·L-1HCl1mol·L-1HNO30.5mol·L-1NaOH1mol·L-180.5592.1256.798.4413.3777.3490.2049.879.7612.4578.5089.6754.468.5512.79/%Pb2+Ni2+Cr3+2Pb2+、Ni2+、Cr3+Tab.2DesorptionrateofdifferentdesorbingagentonPb2+,Ni2+,Cr3+46、TiO2Ni2+Cr3+Pb2+41STUDIESONTHEEFFECTOFADDITIVESONTHESTRUCTURESANDPROPERTIESOFPVDFHOLLOWFIBREULTRAFILTRATIONMEMBRANECaiJunheng1,2,WangXudong1,WangLei1,MengXiaorong3,HuangDanxi1(1.SchoolofEnvironmentalandMunicipalEngineering,Xi'anUniversityofArchitectureandTechnology,Xi'an710055,China;2.Xi'anAcademyofEnvironmentalScience,Xi'an710002,China;3.Xi'anUniversityofArchitectureandTechnology,Xi'an710055,China)Abstract:Polyvinylidenefluoride(PVDF)hollowfibreultrafiltrationmembranewerepreparedbyphase-inversionmethodandoptimizedwithPVP,anhydrousLiClandSMAasadditives,respectively.TheeffectofpolymercontentandkidsofadditiveonpropertiesandstructureofPVDFhollowfibreultrafiltrationmembraneisresearchedbySEM,purewaterfluxandrejection.Theresultsshowedthatthemembranefluxdecreased,retentionrateinc