NO羧甲基壳聚糖的制备及其在印染废水处理中的应用研究李志洲

,723001(CMC).CMC:8mL15mol/LNaOH,2h,400W,ClCH2COOH(7mol/L)8mL,20min,60℃,(DS)0.89;5.63.CMC、pHCOD.:CMC25mL、3h、pH5.0CMCCOD.;;;:TQ610.9:B:1004－0439(2010)11－0043－04N,O-StudyonpreparationofN,O-carboxymethychitosananditsapplicationindyeingwastewatertreatmentLIZhi-zhouSchoolofChemistryandEnvironmentalScience,ShaanxiUniversityofTechnology,Hanzhong723001,ChinaAbstract：TheoptimalpreparationconditionsoftheN,O-carboxymethychitosan(CMC)anditsapplicationindyeingwastewatertreatmentwerestudied.Theresultsshowedthattheoptimalpreparationconditionswereasfollows:8mLof15mol/Lsodiumhydroxidesolutionwasaddedandalkalified2h,8mLofchloroaceticacid(7mol/L)wasaddedunder400Wofmicrowavepowerfor20minofirradiationtime,reactiontemperature60℃,thehighestdegreeofsubstitution(DS)ofreactedproductwas0.89,andtheisoelectricpointoftheproductwas5.63.Theremoval-rateofCODtodyeing-wastewaterwasstudiedunderdifferentdosageofCMC,pH,treat－menttime.TheeffectsofCMCdosage,treatmenttimeandpHontheCODremovalratewereinvestigated.TheresultsshowedthattheremovalrateofCODwashigherwithCMCdosage25mLandtreatmenttime3h,pHvalue5.0.Keywords：microwaveirradiation;carboxymethylation;chitosan;wastewatertreatment2010-01-04(1969-),,,,:.(Chitosan,CTS),、、,,,,β-(1,4)-2--D-β-(1,4)-2--D-[1],、,、、、.[2],,.,.(CMC),,,,.[3-5],TEXTILEAUXILIARIESVol．27No．11Nov．2010271120101127、[6]、、、、、,、、.[7-8],CMC,CMC.11.1:(,88.7%,118mPa·s,80),、、、、(),(),(COD780mg/L).:WF-2000(),721(),GR-200(A&D),PHS-3(),Vertex70(BRUKER).1.2N,O-,40℃15mol/LNaOH(),2h(,30min5min).,7mol/LClCH2COOH,50℃.,(400W),pH7(pH),2~3,2h,.4~5,,80%3,,(0.01%),3,2.80%,60℃,.1.3COD300mL500mL,0.1000mol/L0.1000mol/LpH4;、;10min,30min;3h,10mL250mL,10mL,[9]COD;pH、CTSCMCCOD.10mL250mL10mL,[10]COD;20mL,.1.4(DS):CMC,pH,,[11].0.3gCMC15mL、0.1mol/LHCl,,0.1mol/L,,pH,,.::V1,V2,(V1-V2)NaOH(mL);c;GCMC(g);A1g;161,58.:1.5%,NaOHHClpH,,330nm,pH.CMC:150mg,,.22.1N,O-1,ABDC;NaOH,,NaOH,—NH2、C6—OH.A1B2C2D1,NaOH8mL,2h,ClCH2COOH8mL,400W20min,60℃.0.6437g,CMC.CMC(DS)0.89,,5.63.A=(V1-V2)×c/G,DS=0.161A/(1-0.058A)44112.21,N,O-1630cm-11422cm-1,COONa,3451cm-1NH;1630cm-11422cm-1COCO;1650cm-11590cm-1,1620cm-1;1323cm-1.;N,O-1080、1030cm-11155cm-1,1210cm-1,560cm-1,.2.3COD2.3.12,3COD;CTSCMC25mL,,CMC25mL;.COD,CMC.2.3.2pH3,pHCTSCMCCOD.pHpHCTSCMCCOD,pH5,CTSCMCCOD.:(1)CTSCMC;(2)CTSCMC.pH,CTSCMCH+,CMCNH+;,CMC—COOH,,,,.CTS,CTSCOD.2.3.34,、CTSCMC,,2:CTS,2.5h;CMC,3h,1N,O-10.8220.88k3RD/℃60650.770.06C/min15200.800.05AV(NaOH)/mL880.750.12BV(ClCH2COOH)/mL780.790.08k10.860.740.750.82k20.740.820.800.76810815700.74910920600.8069915650.69710725650.7030.8770258949720700.7159825600.83/cm-1a—;b—110000200030004000ab/mL◆—,■—CTS,▲—CMC;pH=4;ρ()=20mg/L2COD
 

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COD/%400.01001.060802.03.04.020,.3(1)CMC:15mol/LNaOH8mL,2h,7mol/LClCH2COOH8mL,400W,20min,60℃.CMC0.89,5.63.(2)CMC25mL、3h、pH5.0,CMCCOD.:[1],,,.[J].,2007(6):44-46.[2]CHENXi-guang,HYUN-JINP.Chemicalcharacteristicsofo-car－boxymethychitosansrelatedtothepreparationconditions[J].Carbo－hyreatePolymers,2003,53(4):355-359.[3],,.N,O-[J].,2005,27(6):15-18.[4],,,.[J].,2007,27(2):123-126.[5],,,.N,O-[J].,2007,16(3):268-271.[6]YEZhuang,LAUMBJ,LIGGETTR,etal.Impactsofacidgasesonmer－curyoxidationacrossSCRatalyst[J].FuelProcessingTechnology,2007,88:929-934.[7]BOLLOS,FERREYRANF,RIVASGA.ElectrooxidationofDNAatglassycarbonelectrodesmodifiedwithmultiwallcarbonnanotubesdispersedinchitosan[J].Electroanalysis,2007,19(7):833-840.[8],,,.[J].,2007,29(5):277-286.[9],,.[J].,2009,32(11):84-87.[10]GB11914-1989,[S].[11],.[J]..2009(4):123-125.46