从铝形态转化角度分析AlCl3的混凝性能刘敏

AlCl3刘敏1,湛含辉2,戴玉春11.,4120072.,412008:Ferron,AlCl3.,AlCl3Alb,AlCl3AlbpH.AlCl3pH,AlCl3Alb,AlCl3.AlCl3H+,.:AlCl3;;;:X703:A:1001-6929(2009)10-1224-07CoagulationPropertyofAluminumChloridefromthePerspectiveofSpeciationConversionofAluminumLIUMin1,ZHANHan-hui2,DAIYu-chun11.CollegeofPackagingandMaterial,HunanUniversityofTechnology,Zhuzhou412007,China2.ResearchInstituteofEnvironmentalProtection,HunanUniversityofTechnology,Zhuzhou412008,ChinaAbstract:TheAl-Ferrontimedcomplex-colorimetricmethodwasappliedtoinvestigatethecoagulationpropertyofaluminumchloride(AlCl3)fromtheperspectiveofspeciationconversionofaluminum.TheresultsindicatethatthecoagulationefficiencyofAlCl3positivelycorrelateswiththecontentofAlbspecies,andpHisamaincontrollingfactorinfluencingspeciationdistributionofAlCl31BoththecompositionandconcentrationofthesystemandthedosageofAlCl3maycausechangesofpHinthecoagulationsystem,whichcaninfluenceAlbcontentofthehydrolysisproducts,thereforeinfluencingcoagulationefficiencyofAlCl31AlCl3canhydrolyzetoalargerextentandcanproducemoreH+thanotherpoly-aluminums,soittreatswastewaterofhighalkalinityandorganicacidofhighconcentrationmoreefficiently.Keywords:aluminumchloride;coagulationproperty;watertreatment;hydrolyzedproductspecies:2009-01-17:2009-03-23:(20876037):(1963-),,,,,,[e-mail].,.AlCl3.[1-10]:AlCl3Al13,(PAC)Al13.[11-19],(B)0AlCl3Al2(SO4)3.AlCl3,.AlCl3,AlCl3pH,AlCl3.11.1.AlCl3#6H2O,014molPL.250mL,.,110molPLNaOH.,c(Al)011molPL.1Ferron2210200910ResearchofEnvironmentalSciencesVol.22,No.10Oct.,2009DOI10.13198/j.res.2009.10.114.lium.019T-1901(),PHS-25pHpH,111BpHTable1ThespeciationdistributionofAlsaltsofdifferentBvaluesandpHofsystemBP%AlaAlbAlcpHPAC0085139145133118PAC101103310351731123145PAC151152113431535123168PAC20210615561536193179PAC25215113501048.741371.21.2.1.:,015molPLNaNO3NaHCO3,c(NaNO3)c(NaHCO3)[e-mail](011molPL)pH.1.2.21:1000mL,015g,5min,011molPLNaOHpH81712:1000mL,NaHCO3NaNO3,c(NaNO3)c(NaHCO3)5@10-4molPL,015g,5min,011molPLNaOHHClpH8713:2c(NaNO3)c(NaHCO3)116@10-4molPL,.1.31.3.1200mLpH7168,10516NTU,815,0,1,3,5,710mL011molPLAlCl3,1min,30min,2cm.011molPLPAC25(B=215)011molPLAlCl3,.1.3.2014,1,2,4,6,810mL0105molPLB0,1102151,250rPmin1min,30min,2cm.2.1.3.3pH200mL2,012,1,2,4,6,810mLc(Al)510@10-2molPL,B0AlCl3,1min,30min,2cm,pH.200mL3,.1.3.4c(Al)011molPL,B0,110,115,210215200mLpH615,2min,,Ferron,pH.,,pH,.1.3.5pHNaOHHCl(011molPL)pH4,5,6,7,89,011molPLAlCl3,2min,Ferron,pH.,,pH,.1.3.6pHQ()015mgPL,015molPLNaHCO3NaNO3,c(NaNO3)c(NaHCO3)5@10-3,1@10-3,5@10-4,1@10-4,1@10-50molPL,011molPLNaOHHClpH81715@10-3molPL200mL,0,1,2,4,6,8,10,1215mL0105molPLB0(AlCl3),pH.c(NaNO3)c(NaHCO3)1@10-3,5@10-4,1@10-4,1@10-50molPL200mL,.22.1AlCl32.1.1,1.122510:AlCl31Fig.1Theremovalratesofturbidityandchromaofpapermakingwastewateractedbydifferentcoagulants1,,AlCl3PAC25,PAC25.PAC25AlbAlc,AlbAlcP/0[1,7],.2.1.2AlCl3AlCl3,PAC10PAC25;,2:1212.2,2,B,.1,AlCl3PAC10,;PAC25.2B,.[1-5,20],,Alb,,Alb.2,PAC252,Alb;PAC0PAC102,12,2.B:1)0;2)1.0;3)2.52Fig.2TheeffectofcompositionofwatersystemoncoagulationpropertyofAlcoagulants2.1.3AlCl3,c(NaNO3)c(NaHCO3)116@10-4510@10-4molPL3c(NaNO3)c(NaHCO3)510@10-4molPL2AlCl3,3.3,AlCl38mgPL,,2.AlCl38mgPL,1226223AlCl3Fig.3TheeffectofdosageofAlCl3andcomponentconcentrationofwatersystemoncoagulationproperty,2;3.AlCl3,.AlCl3,pH,pHAlCl3,pHAlCl3.2.2pH2.2.1BpHAlCl32,B.,pH615,pH,4.41,(1),BAlb,Alb,2/0,.AlbB,B215,Alb,B0110Alb.AlCl3Alb.AlCl3212,.AlCl3Alb2;AlCl3Alb1,AlCl3Alb.42BAlbpHFig.4TheAlbconcentrationdistributionofAlsaltsofdifferentBvaluesandpHdifferencesintwowatersystemspH,pH.,pH6154~51pH615715.2pH.2.2.2pHAlCl3AlCl3,pHpH,5.5(a),,pH,Alb122710:AlCl35AlCl32AlbpHFig.5TheAlbconcentrationdistributionofAlCl3intwowatersystemsandpHbeforeandafterhydrolysis.,pH,Alb.pH6~8AlbpH.AlCl3pH15(b)2,pH,pH4~51AlCl3AlbpH,.AlbpH6~8,pH,.,NaHCO3pH.pH,.,pH.2.3pH2.3.1pH4,5,,pH.,pHpH,pH,H+,H+pH.,H+HCO3-,pH.HCO3-H+H2CO3CO2,pH.,pH,pH.pH,pH,.2.3.2AlCl3pH323pH,6.6,AlCl3,2pH.2pHAlCl3,3pH.2,AlCl3,pH6~8,Alb,AlCl32(3).3,AlCl38mgPL,pH6~8,AlCl3.AlCl38mgPL,pHpH6,AlbAlCl3.,AlCl32,pH,pH,1228226AlCl3pHAlbFig.6TheeffectofdosageofAlCl3onpHandAlbconcentration.2.3.3pHpH.pHAlCl3NaHCO3NaNO3,pH,7.c(NaNO3),c(NaHCO3)P(molPL):1)0;2)1@10-5;3)1@10-4;4)5@10-4;5)1@10-3;6)5@10-37AlCl3pHFig.7TheeffectofbuffercapacityanddosageonpHofthesystem7,,AlCl3,pH,pH.5~10mgPL,c(NaNO3)c(NaHCO3)3@10-4~7@10-4molPL,pH6~8,,.33.1[20]:xAl3++yH2O=Alx(OH)y(3x-y)++yH+(1)H+,H+,.H+,pHAlb.3.2NaHCO3,:HCO3-+H+=H2CO3(2)HCO3-(2)H+,H+,pH,,.NaHCO3NaNO3,H+,H+,pH,,,.3.3AlCl3,AlCl3Alb,AlCl3AlbAlCl3pH.pH,pHAlCl3Alb,AlCl3.pH,AlCl3.B,AlCl3122910:AlCl3pH,,H+,pH.[11],AlCl3H+,AlCl3.[12],-,H+,AlCl3,,.,AlCl3B,pH,,AlCl3B.4a.AlCl3.AlCl3Alb.b.AlCl3pH,AlCl3pH,AlbAlCl3.c.AlCl3H+,.:,.(References):[1],.-[J].,1997,16(6):497-505.[2],,.[J].,1997,16(6):506-514.[3].[J].,1998,18(1):1-10.[4],,,.[J].,2003(2):97-101.[5],.pH[J].,1998,17(2):163-169.[6],,.[J].,2000,20(3):250-253.[7],,GREGORYJ.IPF-PACl:[J].,2001,21():17-22.[8],,,.[J].,2007,20(1):75-79.[9],,,.pH[J].,2008,21(6):52-56.[10],,,.[J].,2007,20(5):133-136.[11],,.Al13[J].,2006,27(12):2467-2471.[12