改性壳聚糖絮凝剂的制备及絮凝性能的研究林静雯

27520059　　　　　　　JOURNALOFNANJINGUNIVERSITYOFTECHNOLOGYVo.l27No.5Sep.2005林静雯1,胡筱敏2,高　丹1,马　爽1(1.沈阳大学沈阳环境工程重点实验室,辽宁沈阳110044;2.东北大学资源与土木工程学院,辽宁沈阳110004)　:以过硫酸铵为引发剂,在壳聚糖与丙烯酰胺的质量比为1∶2的条件下,使壳聚糖和丙烯酰胺在30℃时发生接枝共聚反应,制得改性壳聚糖絮凝剂(CAM),通过对高岭土悬浮液和印染废水的絮凝实验表明,CAM具有阳离子型高分子絮凝剂的典型特征,其絮凝性能优于壳聚糖,在其用量为壳聚糖质量的20%情况下,CAM对印染废水的CODCr去除率提高了30%。:壳聚糖;丙烯酰胺;接枝共聚;絮凝性能;印染废水:X703.1　　　:A　　　:1671-7643(2005)05-0050-04　　N,,[1]。,、[2]。[3],。[4],,。,,[5,6],,。,。11.1　:,80%,;:,;、、;:,400～500;pH12～14;CODCr950mg/L。1.2　EST2001COD;721;;PHS2;DJ6CS;NDJ1;;(JJ1,90W,0～3000r/min);766。1.3　1.3.1　CAM,N2,1.5%100mL、2g,30℃45min。,15min,4g,3h,。CAM。1.3.2(1):NDJ1CAM[2]。(2)::2005-03-20:(2004008):(1965-),,,,,;Email:[e-mail]。,,1G2,,50℃24h,,KBr[2],,。1.3.3(1)[7,8]。1L,5g,1L。300r/min15min。120r/min,1min,40r/min5min,,5min,10mL。550nm,。(2)CAM,CODCr,500mL,220r/minPAC,1min,50r/min,10min,20min,550nm,、CODCr。CODCr。(D%),D%=[(ε0-ε)/ε0]×100%。:ε0;ε。2　1　Fig.1　IRspectrumofchitosan2.1　1。13446、2920、1665cm-1,23446、2920、1665cm-1,1600cm-1,。2　Fig.2　IRspectrumofco-polymerizationofchitosanandacrylamide2.2　CAM2.2.1　pHCAM3　pHFig.3　InfluenceofpHonpropertiesofflocculationpH,,3,pH,。pH,。,[9]。,,。,,,—COO-[10],,,。、,pH,。。,51　5:,,,。2.2.2　CAMCAM,4。CAM1.5mg/L,CAM,1.5mg/L,99%。,。,,,[10]。,,。4　CAMFig.4　InfluenceofCAMmassconcentrationonpropertiesofflocculation2.2.3　CAMCAM,1∶2,3h30℃,CAM,CAM,5,,CAM,,3mmol/L,CAM10×104mPas,99%,3mmol/L,CAM,。[11]。,,。,,,。,,,,,。2.2.4　CAM(1)CAM、(1.5%),,5。CAM2.0mg/L,99%,2.5mg/L,70%。CAM,,,,。,。5　CAMFig.5　CompareofCAMandchitosanonpropertiesofflocculationontreatingkaolinsuspension(2),。CAM,1。CAM110,CODCr。CAM,CAM,。1　CAMTable1　CompareofdifferentpropertiesofCAMonflocculation/(mgL-1)　/(mPas)/%10.2590025.020.50150074.033.0010000099.044.003650095.052　　　　　　　　27　2　CAMTable2　CompareofCAMandchitosantreatingdyeingwastewateronpropertiesofflocculation/(mgL-1)CODCr/(mgL-1)CODCr/%D/%CAM1.03526395.92155064793.813　　(1),1∶2,,CAM。(2)CAM,,。(3),CAM,。,20%,CODCr30%,。:[1]　　.[M].:,2000.[2]　.[M].:,2003.[3]　　.[J].,2000,29(2):29-32.[4]　.[J].,2002,24(3):129-131.[5]　LiLiuzhu.Synthesisandflocculationpropertyofchitosan-acrylam-idegraftcopolym[J].ChemResChineseu,2004,20(2):221-224.[6]　KimKyoungHo,KimKongSoo,ShinJacSup.Graftcopolymer-izationofchitosanandacrylamidebyusingcericammoniumni-trateinitiator[J].Pollimo,1987,11(2):133138.[7]　.[M].:,1985.[8]　,.[J].,1989,(11):495-498.[9]　.[D].:,1999.[10]　.,,[M].:,2001.[11]　.[M].:,1992.PreparationofmodifiedchitosananditspropertiesofflocculatingLINJing-wen1,HUXiao-ming2,GAODan1,MAShuang1(1.ShenyangKeyLaboratoryofBiologyandEnvironmentEngineering,ShenyangUniversity,Shenyang110044China;2.CollegeofSourceCivilEngineering,NortheasternUniversity,Shenyang110004,China)Abstract:Themodifiedchitosan(CAM)wasmadebygraftco-polymerizationofchitosanandacrylamideusingtheammoniumpersulfateasinitiatorandthemassratioofchitosanandacrylamideis1∶2,reactiontemperatureis30℃.TheresultsofflocculatingexperimentsofCAMonkaolinsuspensionanddyeingwastewaterindicatedthatCAMhasatypicalcharacterofcationhighmoleculerflocculationandbetterflocculatingabilitythanchitosan.TheremovalrateofCODCrofdyeingwastewaterenhancedby30%inflocculant'saddingquantityreducedby80%.Keywords:chitosan;acrylamide;co-polymerization;propertiesofflocculation;dyeingwastewater53　5: