搜索
26620066ActaScientiaeCircumstantiaeVol.26,No.6Jun.,2006:863(No.2002AA00601140)SupportedbytheHi2TechResearchandDevelopmentProgram(No.2002AA00601140):(1976-),,;3(),E2mail:wgds@rcees.ac.cnBiography:YANMingquan,(1976-),male,PhD,;3Correspondingauthor,E2mail:wgds@rcees.ac.cn,,,.2006.[J].,26(6):887-892YanMQ,WangDS,QuJH,etal.2006.Enhancedcoagulationonatypicalhighalkalinityandmicro2pollutedNorth2Chinasourcewater[J].ActaScientiaeCircumstantiae,26(6):887-892[]:1,1,3,1,1,21.,1000852.,300040:2006203224:2006205211:,.,..,3.pH,,AlCl3pH6,FeCl3pH5,;;.,,,30%.:;PACl;(NOM);pH:025322468(2006)0620887206:X52:AEnhancedcoagulationonatypicalhighalkalinityandmicro2pollutedNorth2ChinasourcewaterYANMingquan1,WANGDongsheng1,3,QUJiuhui1,TANGHongxiao1,HEWenjie21.StateKeyLaboratoryofEnvironmentalAquaticChemistry,ResearchCenterforEco2EnvironmentalSciences,ChineseAcademyofSciences,Beijing1000852.TianjinCityWaterSupplyGroupCo.Lid.,Tianjin300040Received24March2006;accepted11May2006Abstract:ThepaperstudytheenhancedcoagulationcriterionforChinathroughacasestudyofhighalkalinity,micro-pollutednorth-chinawater.Thepaperrendertheseasonalenhancedcoagulationtargetthroughbenchtest,basedonwatercharacteristicsinvestigation.Threemeasureseswerefoundinthepaperforthistypewater,thefristisisadjustingpHduringcoagulationinfavorofmid-polymerproduct,whichproducewellataboutpH6forAlCl3,andpH5forFeCl3,atthosepHstheremovalofTOCincreasemorethanonetime;Thesecondisenhancedprecipitativesoftening,thethirdiscoagulantreform.Wehavesucceededreformingconventionalcoagulantforthiswater,whichcouldincrease30%moreNOMremovalthanconventionalcoagulants,whichisveryefficientinturbidityremovalalso.Keywords:enhancedcoagulation;PACl;naturalorganicmatter;pH,;,.;,(NOM),.,.NOM(USEPAetal.,1999;Jacangeloetal.,1995;Randtke,1988).(NOM)(BAT)(Jacangelo,1995;USEPA,1999).26,,.NOM.,;,,,.pH(USEPA,1999;Crozes,etal.,1995).,,.,,.1(Materialsandmethods)1.1,pHUV254TOC..1200mL800mL,200rmin-130s,;2min40rmin-1,10min,20min2cmTOCUV254pH.pH,30sHClNaOH.FeCl3AlCl3;PAClHPAC.1.2HACH2100N(HACH);pHMODEL828pH();TOCPheonix8000TOC();UV2540.45m1cm(UV-VIS8500Spectrophotomet).1.3(Yan,2006).2(Results)2.1,,,;,,.,,,(120mgL-1,CaCO3)pH(8.2).,2,,,,,(Davisetal.,1981).,,.CODMn4.8mgL-1,,.112.1,,,15.63%.Leeheer(2003),10%.,4.25%.,(3104)(1).,SUVA,SUVA(Crouetal.,2000;Edzwaldetal.,1985;O’Meliaetal.,1987;Weishaaretal.,2003).Edzwald(1990),SUVA4,.SUVA,3.412.11.1Table1ComponentcomparisonofYellowRiverwaterwithLuanheRiverwaterPOC/TOCDOC/(mgL-1)UV254SUVA4.25%3.4560.1183.4115.63%4.2950.0912.128886:1Fig.1ComparisonofmoleculeweightofNOMinYellowRiverwaterandLuanheRiverwater2((HoB&N)(HoA)(WHoA)(HI))Fig.2ComparisonofNOMpolarityinrawwaterofYellowRiverwaterandLuanheRiverwater(1)(2),,70%(O’Meliaetal.,1987,Jacangeloetal.,1995),.,,.,100070%,21%,11033104(O’Meliaetal.,1987),.,,SUVA(Crouetal.,2000;Edzwaldetal.,1985).Owen(1995),SUVA,;,SUVA,SUVA.2.2,,6:(LTTH,);(SprH,);(ESumH,);(ESumL,);(HTAL,);(AutH,,).,6(34).,.;,3UV254Fig.3TheremovalofUV254byFeCl3insixwaterperiods4Fig.4TheremovalofTurbiditybyFeCl3insixwaterperiods98826.UV254,.4,.34,.,,..2.3(USEPA)EnhancedCoagulationandEnhancedPricipitativeSofteningGuidanceManual,,USEPA.USEPA,,10mgL-1Al2(SO4)314H2O,TOC0.3mgL-1,TOC.USEPA,2,5.5TOCUSEPAFig.5ThecomparisonofTOCremovalbyAlCl3fortypicalYellowRiverwaterandLuanheRiverwaterreferringtheUSEPAprotocoljartest5,,USEPA,TOC20.3%(B);TOC817%,(A).2:;(Randtke,1988).5,50mgL-1Al2(SO4)314H2O,TOC31%(D),.,35mgL-1Al2(SO4)314H2OTOC12.7%(C),,,.,UV254,(Crouetal.,2000;Edzwaldetal.,1985).Edzwald(1985)UV254TOC.,UV254,,,UV254.3(UV254)(),2.,,..,,pH.2Table2TargetofEnhancedcoagulationforTianjinwater/(mmolL-1)/NTUUV254/(mmolL-1)/NTUUV254SprH0.041.547.0%0.11.216.5%ESumH0.042.235.0%0.141.720.0%ESumL0.041.1417.0%0.10.7527.5%HTAL0.041.620.0%0.120.827.0%AutH0.061.9617.5%0.121.22.5%LTTH0.042.445.0%0.12.415.0%2.4pH,pH,FeAl,,pH,FeAlFe(OH)3(s)Al(OH)3(s),(Duanetal.,2003).,,0986:..6.6pHFeCl3AlCl3PAClFig.6TheeffectofpHonDOCandTurbidityremovalbycoagulants,FeCl3,AlCl3,PAClatdosage0.08mmolL-1(a.DOCremovalratio;b.UV254removalratio;c.Residualturbidity)pH.AlaAlbAlc3.,Ala;pH,Alb,pH6,Alb;,Alc,Alb(Wangetal.,2004).Ala,,;Alb,,,,,0145m;Alc,,.DOCAlb;Alc,Alb,,,;UV254Alb+Alc,Alc(Yan,2006).pH6,Alb(Wangetal.,2004),,,Alc,,DOC.UV254pH68.,PACl,,PACl.,,,,.,.,AlCl3PAClpH6,pH5.6,Mg2+(30mgL-1),pH11,Mg(OH)2,Mg(OH)2,,,CaCO3.,.,,3:pH,;,;,,pH11,Mg(OH)2.2.5,pH,,,,,.,PACl,,Alb.,PAClHPAC(Yan,2006),Alb,,.HPACPACl(7).198267FeCl3AlCl3,PAClHPACDOCFig.7ComparisonofDOCremovalefficienciesoffourtypicalcoagulants:FeCl3,AlCl3,PAClandHPAC2,,.PACl,,,PACl,.,PACl,,.PACl(HPAC)DOC30%,USEPATOC15%.,HPAC,,.,HPACSUVA,(Yan,2006).,HPAC,./HPAC.3(Conclusions)1),,,.2),.3)3.4),,30%.References:CrouJP,KorshinGV,LeenheerJA,etal.2000.Isolation,fractionationandcharacterizationofnaturalorganicmatterindrinkingwater[C].AWWAResearchFoundationandAmericanWaterWorksAssociation,Denver:324DavisJA,GloorR.1981.Adsorptionofdissolvedorganicsinlakewaterbyaluminumoxide.Effectofmolecularweight[J].ES&T,15(10):12231229DuanJM,GregoryJ.2003.Coagulationbyhydrolysingmetalsalts[J].AdvinColloida