庚醛改性壳聚糖的制备及其对酚类化合物的吸附性能辛梅华

辛梅华＊　谢　英　李明春　张兴松　顾丹丹(　362021)　　Schiff′s,NaBH4N-,(CTS)FTIRXRD,2,4-。、pH、2,4-。,CTS;pH,pH=6.0,2h2,4-,Freundlich;2,4-CTS,0.6g/L2,4-70.07.7mg/g。　,,,:O636.1　　　　　:A　　　　　:1000-0518(2008)01-0077-042007-01-27,2007-05-30(E0540001):,,,;E-mail:[e-mail];:,,、,、、。、、[1～5],Rawajfih[6]44.3mg/g。(CTS),,[7,8],。Zheng[9]CTS。—NH2pH—NH+3。N-CTS、N,、,。Schiff′s,NaBH4N-,2,4-。1　1.1　THZ-82;DZF-6050;UV-2401PC-(Shimadzu);NEXUS470(Nicolet),KBr;D8ADVANCEX(Bruker),5°～30°,2°/min,CuKα,40kV,40mA。(CTS),DD%=95.12,80mPa·s,,(SDS),,2,4-(DCP),AR。1.2　3.2gCTS200mL2%,,。2.5CTS6%SDS,80℃6h。NaOHpH,1.510%NaBH4,2～3h,pH9～10,,,,48h,45℃,CTS。1.3　CTS1g/L2,4-,,UV284nm。,。0.1gCTS,20mL0.08g/L2,4-,251Vol.25No.120081　　　　　　　CHINESEJOURNALOFAPPLIEDCHEMISTRY　　　　　　　Jan.200830℃(120r/min),。284nm(pH=8λ=293nm),QQe:Q=(c0-ce)/c0×100%　　　　　　　Qe=(c0-ce)V/m,c0ce2,4-(g/L),V(mL),mCTS(g),Q(%),Qe(mg/g)。2　2.1　CTSFTIRCTSCTSC2,。CTS(0.65)1。1aCTS,CTSO—HN—H3200～3500cm-1,1592cm-1—NH2CO,1421cm-1CTSN—H,1257cm-1CTSC—N。1030～1350cm-1C3C6C—OO—H。1bCTS。,CTS,,C—H29272856cm-1CTS,1592cm-1N—H,1467720cm-1,1467cm-1—CH3、—CH2—C—H,720cm-1n≥4(CH2)n,CTS。1　(a)(b)Fig.1　FTIRspectraof(a)chitosan,and(b)N-alkylchitosan2　CTS(a)CTS(b)XRDFig.2　XRDpatternsof(a)chitosan,and(b)themodifiedchitosan2.2　CTSXRD2CTSCTSX。,CTS2θ11.6°、20.2°26.7°3。CTS11.6°26.7°,20.2°,CTSCTS,,。78　　　　　　　　　　　　　　　　　　　25　2.3　1g100mL,:CTS2%HAc1%HCl,,。,CTS,,。2.4　CTS0～0.2g/LA-c:A=12.48c+0.0526,R2=0.9999,c(g/L)。CTS3。,CTS,1h,,,2h。3　CTSFig.3　AdsorptionKineticsof2,4-dichlorophenoltothemodifiedCTS4　pHCTSFig.4　EffectofpHontheadsorptionquantityof2,4-dichlorophenoltothemodifiedCTS2.4.1　溶液pH对吸附的影响　pHCTS4。,pH6.0,pH6.0,CTS—NHR,—OH,、,。pH6.0,CTS—N+H2R,,C6H5O-,,。2.4.2　酚浓度对吸附的影响　pH=6,5。,,,。5　CTSFig.5　Effectofphenolconcentrationontheadsorptionquantity6　CTSFreundlichFig.6　FreundlichabsorptionisothermofthemodifiedCTSFreundlichlgQe=lgk+1/nlgce,,k、nFreundlich,ce(mg/L),Qe(mg/g),CTS2,4-(6)。,Freundlich:lgQe=0.6517lgce+0.3215,R2=0.9938,k2.097,79　1:n1.53,k,k,。n,n0.1～0.5,;n1;n2[10]。,2,4-CTS。2.4.3　改性CTS用量对吸附的影响　pH=6,2h,0.6g/L20mL,CTS,,0.5g,100%。2.5　CTSCTS0.1gCTS,20mL0.6g/L2,4-,pH=6.02h(120r/min),。0.1gCTS,,CTSpH=5,3h,CTS7.7mg/g,CTS70.0mg/g。,2,4-。　　　　1　WANGHong-Juan(),XIHong-Xia(),XIAQi-Bin(),LIZhong().IndWaterTreat(工业水处理)[J],2002,22(6):6　2　SahinkayaE,DilekFB.BiochemEngJ[J],2006,31(2):141　3　ZiloueiH,GuieysseB,MattiassonB.ProcessBiochem[J],2006,41(5):1083　4　WangJL,ZhaoX,HegemannW.ActaSciCircumstantiae[J],2003,23(6):813　5　MengZF,ZhangYP,LiRH.ActaSciCircumstantiae[J],2005,25(10):1365　6　RawajfihZ,NsourN.JCollandInterfaceSci[J],2006,298(1):39　7　RamnaniSP,SabharwalS.ReactiveandFuncPolym[J],2006,66(9):902　8　SUNSheng-Ling(),WANGLi(),WUJin(),WANGAi-Qin().PolymBull(高分子通报)[J],2006,(6):32　9　ZhengSK,YangZF,JoDH,ParkYH.WaterRes[J],2004,38(9):2315　10　CHENYi-Liang(),PANBing-Cai(),MENGFan-Wei(),ZHANGQuan-Xing().IonExchangeandAdsorption(离子交换与吸附)[J],2004,20(3):205PreparationofN-AlkylChitosanandItsAdsorptionof2,4-DichlorophenolXINMei-Hua＊,XIEYing,LIMing-Chun,ZHANGXing-Song,GUDan-Dan(CollegeofMaterialScienceandEngineering,HuaqiaoUniversity,Quanzhou362021)Abstract　AN-alkylchitosanderivativewassynthesizedbyreducingSchiff′baseformedfromthereactionofn-Heptaldehydeandchitosanviaphasetransfercatalysis.ThemodifiedchitosanwascharacterizedbyFTIRandXRD.Thechitosanderivativewasappliedtoadsorbing2,4-dichlorophenol.Theeffectsofadsorptionconditions,suchastime,pH,theconcentrationof2,4-dichlorophenol,andtheamountofthemodifiedchitosanontheadsorptionquantityof2,4-dichlorophenolwerestudied.TheN-alkylchitosanexhibitedgoodacidresistance.ThesolutionpHwasthemainfactoraffectomgtheadsorption.AtpH6.0,theadsorptionof2,4-dichlorophenolreachedthemaximumin2h.Therelationshipbetweentheconcentrationof2,4-dichloro-phenolandtheadsorptionquantitywasfittedwelltoFreundlichequation.N-alkylchitosanshowedbetteradsorptioncapabilitythanchitosan.Adsorptioncapacityofthemodifiedchitosanandchitosanfor2,4-dichlo-rophenolof0.6g/Lconcentrationwas70.0mg/gand7.7mg/g,respectively.Keywords　chitosan,alkylation,dichlorophenol,adsorption80　　　　　　　　　　　　　　　　　　　25