高岭土动态膜的制备卓琳云

:1007-8924(2006)03-0037-04高岭土动态膜的制备卓琳云,李　俊,陈季华,李　方(,200051)　:以陶瓷膜管为基质,研究了高岭土动态膜的制备过程.实验以高岭土为动态膜预涂材料,采用错流操作对膜管进行涂膜,通过记录和分析涂膜过程中的渗透液通量和测定在此过程中涂上的高岭土的量随时间的变化,研究了高岭土粒径、涂膜液浓度、跨膜压力、错流速度和涂膜时间对涂膜效果及清水通量的影响,对涂膜过程有了较好的认识,并得出最佳涂膜条件为:涂膜液质量浓度0.3g/L、跨膜压力0.2MPa、错流速度0.5m/s及涂膜时间10min.:高岭土;陶瓷膜;动态膜;错流微滤:X703　　:A　　(Dynamicmembrane),(Secondmembrane)[1].,..,(、、、、MnO2),.1965OakRidgeZrOCl2.,,,,,,[2].,Anderson[3]KMnO4MnO2.[4]、Yoshiski.Kiso[5].Johari[6].,,、,.,,,.6000,,.1　实验材料及方法1.1　,α-Al2O3,9mm,13mm,38cm,2μm.,1250、4000、6000.表1　高岭土目数与粒径的换算Tabel1　Conversionofkaolinmeshandparticlesize/1250200040006000/μm1063.122.09:2004-09-17;:2004-12-06:(012312032):(1980-),,,,.26　3　　　　　Vol.26　No.320066MEMBRANESCIENCEANDTECHNOLOGYJun.2006DOI:10.16159/j.cnki.issn1007-8924.2006.03.0081.2　1.,,,,,,,,..,.1、2.;3.;4.;5、6.;7.;8、9、10.;11.1　Fig.1　Flowdiagramofprocess.20,..,,.,.,.,.,.,,,.,,,.,.NaOH,pH13～14,1h,pH1～20.5～1h..1.3　,.,.J=ΔVπdl·Δt,J,d,l.,,10s,ΔtΔV.,.ΔVJ20℃..SS..2　结果与讨论2.1　,0.7g/L、0.5m/s、0.2MPa,3.(2),,,JpRtJ=Δp/ηRt,.,[7].,,.,(),(6000).2　Fig.2　Relationshipbetweenfluxandtimeatvariouskaolinparticlesizes　·38　　　·　　　　　26　2.2　0.5,1.0,1.5、2m/s,0.2MPa,0.3g/L,10min.,1,1.5,2m/s,.0.5m/s,.0.5m/s.2.3　,.0.5m/s,0.3g/L,0.1,0.2,0.3,0.4MPa.(3),,.0.2MPa0.3MPa,,,0.2MPa.3　Fig.3　Membranefluxwithrespecttotimeandatvariouspressure2.4　0.5m/s、0.2MPa,(0.1,0.3,0.5,0.7g/L),.,,,,,.4,0.3g/L0.1g/L,,,,.,,,.,,0.3g/L.4　Fig.4　Membranefluxwithrespecttotimeandatvariouskaolinconcentrations2.5　2.5.1　(0.5m/s),(0.3g/L),,(5).,.,(0.3,0.4MPa),,,10～20min.(0.1,0.2MPa),.5　Fig.5　Kaolinweightwithrespecttotimeandatvariouspressure2.5.2　(0.5m/s),(0.2MPa),,(6).,,.0.5,0.7g/L,,1h.0.1,0.3g/L,1h.5、6,,3、4,,　3:·39　　　·　6　Fig.6　Kaolinweightwithrespecttotimeandatvariouskaolinconcentrations20min,.3　结论2μm,,,,:1),,,,6000.　　2),0.5m/s,0.2MPa0.3g/L.3)、,10～20min,.[1]　,,,.[J].,2003,19:29-31.[2],　,.[J].,2003,23(3):49-53.[3]MuhammadHA,AndersonGK.Crossflowmicrofiltra-tionwithdynamicmembrane[J].WatResSci,1997,31(8):1969-1979.[4],.-[J].,2002,23(6):51-56.[5]YoshiakiKiso.Wastewatertreatmentperformanceofafil-trationbio-reactorequippedwithameshasafiltermate-rial[J].WatRes,2000,34(17):4143-4150.[6]MegatJMMN,FakhrulRA.Performanceofflexiblemembraneusingdynamincmembraneintreatingdomesticwastewater[J].Des,2002,147:263-268.[7],　,,.[J].,2001,21(6):560-563.PreparationofdynamicallyformedmembranefromkaolinZHUOLinyun,LIJun,CHENJihua,LIFang(InstituteofEnvironmentScienceandTechnology,DonghuaUniversity,Shanghai200051,China)Abstract:ThePreparationofdynamicallyformedmembraneonthetopofceramicsupportwasinvestigatedwithcrossflowoperation.Thefluxofthemembrane,andtheamountofkaolindepositedontheinnerwallofthece-ramictubeweremeasuredduringtheexperiment.Theeffectsareparticlesizes,concentrationofkaolin,trans-membranepressure,crossflowvelocityandmembrane-formingtimewereinrestigated.6000meshkaolinwasusedastheexperimentmaterial.Theresultsshowthatthebestmembrane-formingconditionwas:concentra-tionofkaolin0.3g/L,transmembranepressure0.2MPa,crossflowvelocity0.5m/s,membrane-formingwere10minitues.Keywords:kaolin;dynamicmembrane;ceramicmembrane;crossflowmicrofiltration　·40　　　·　　　　　26