化学混凝沉淀法处理低浓度含氟废水研究

1,1,2,1,1(1.,421001;2.,510630):,,,,CaCl21200mg/L,CaCl2pH10.5,PACPAM400mg/L2mg/L,4.6mg/L,(GB89781996)PAM,,15min:;;:X703:C:1000-4602(2008)11-0076-04TreatmentofLow2concentrationFluorideWastewaterbyChemical/CoagulationandSedimentationProcessLIUHai2bo1,ZUOWen2wu1,2,LINWen2zhou1,LOUJin2sheng1(1.SchoolofUrbanConstruction,UniversityofSouthChina,Hengyang421001,China;2.GuangzhouHomelandEnvironmentalEngineeringCo.Ltd.,Guangzhou510630,China)Abstract:Inordertoachieveup2to2standarddischargeoffluoridewastewaterfromasemiconduc2torintegratedcircuitfactory,thesimulatedwastewaterwaspreparedaccordingtothefluorideionconcen2trationofthefluoridewastewaterdischargedfromthisfactory,thechemical/coagulationandsedimenta2tionmethodwasappliedinfluorideremovaltest,andtheoptimalchemicalscombinationandoperationconditionweredetermined.TheresultsshowthatwhenthedosageofCaCl2is1200mg/L,thepHvalueofCaCl2mixedeffluentisadjustedto10.5,andthedosageofPACandPAMis400mg/Land2mg/L,thecontentoffluorideionineffluentcanbereducedto4.6mg/L,reachingthefirstlevelcriteriaspeci2fiedinIntegratedWastewaterDischargeStandard(GB8978-1996).AddingPAMcanacceleratethesedimentationspeedandenhancethefluorideremovaleffect,andthesedimentationtimeshouldbecon2trolledat15minutes.Keywords:fluoridewastewater;chemical/coagulationandsedimentationprocess;orthogonalexperiment:(02C382)(100mg/L),,67241120086CHINAWATER&WASTEWATERVol.24No.11Jun.2008(PAM),[14],,10mg/L1111,PAC,PAM,11Fig.1Experimentalproject112NaF,[F-]=120mg/L,pH=61131000mL6,6,pH,TA6-1,CaCl2,150r/min30min,F-Ca2+,pH,,180r/min1min,45r/min30min,PAM,45r/min10min,1.5h,20mL114TA6-1,PHS-3CpH,PF-1,2211pHCaCl2,,pH,6,pH,CaCl2800mg/L,150r/min30min,1.5h,pH=7;pH79,pH,;pH=10;pH=11,pH,Ca2+OH-Ca(OH)2,F-Ca2+,[56]2126,pH7,CaCl2,150r/min30min,1.5h,,22Fig.2EffectofCaCl2dosageonF-removalefficiency2,,,1000mg/L,15.9mg/L,1000mg/L213,,,,,,,,21311PACpH=71000mg/L,pH412,PAC400mg/L,pH,pH,,pH7,10mg/L,pH=10.5,,pHPACpH10.577:2411pH,PAC,180r/min1min,45r/min30min,1.5h,,33PACFig.3EffectofPACdosageonF-removalefficiency3,PAC,,PAC400mg/L,10mg/L,PAC600mg/L,5.1mg/L;PAC,PAC600mg/L21312pH=71000mg/L,pH512,50mg/L,pH,pH11pH,,180r/min1min,45r/min30min,1.5h,,,,40mg/L,15.9mg/L,,40mg/L21313pH=71000mg/L,pH411,100mg/L,pH,pH7,pH;pH=9,,pH=11,,,,Fe2+,,pH9pH,,180r/min1min,45r/min30min,1.5h,,,,50mg/L,13.4mg/L,50mg/LCaCl23,CaCl2/PAC10mg/L,PAC214PAM1000mg/LPAC600mg/LpH10.5,PAM,45r/min10min,1.5h,,11PAMTab.1EffectofPAMdosageonF-removalefficiencyPAM/(mgL-1)123456pH6.67.16.76.66.86.8/(mgL-1)4.74.04.14.75.15.31,PAM16mg/L,,pHPAM2mg/L,PAM2mg/L2151000mg/LPAC600mg/LPAM2mg/LpH10.5,,,,45min,,15min,4.2mg/L2162.5,872411:80160mg/L,,10mg/L,GB89781996217pHCaCl2PACPAM4,3,,,22Tab.2ResultsoforthogonaltestCaCl2/(mgL-1)pHPAC/(mgL-1)PAM/(mgL-1)[F-]/(mgL-1)18009800215.2210009400110.9312009600312.9480010.560014.85100010.5800310.06120010.540024.6780012400321.38100012600217.39120012800114.6K141.339.036.830.3K238.219.435.037.1K332.153.239.844.2K113.813.012.310.1K212.76.511.712.4K310.717.713.314.7R3.111.21.64.62,:CaCl21200mg/LpH10.5PAC400mg/LPAM2mg/L,4.6mg/L,GB89781996,:pHPAMCaCl2PAC,pH3PACCaCl2/PAC/PAM10mg/LpHpH10.5,CaCl2PACPAM12004002mg/L,4.6mg/L,(GB89781996)PAM,,15min:[1],,,.[J].,1991,7(5):378-382.[2],,.[J].,1999,19(6):341-345.[3],,.[J].,2005,21(7):1-4.[4],,,.[J].,2006,22(21):47-49.[5],.[J].,2006,37(6):634-636.[6],,,.[J].,2007,23(7):49-51.:[phone]E-mail:[e-mail]:2008-01-1097:2411