CaCl-2-PAC絮凝法处理含氟废水的研究

:(1981-),,,CaCl2-PAC絮凝法处理含氟废水的研究杨际幸,杨天足,张杜超,窦爱春(中南大学冶金科学与工程学院,湖南长沙410083):pH,PAC,PAC,100mg/L,102mg/L,pH65,PAC400mg/L,362mg/L100mg/L90min,PAC,,55PAC:除氟;PAC;氯化钙;混凝:X701:A:1003-5540(2011)02-0053-04,,05~1mg/LGB8978-199610mg/L,,,:,[1~3],[4],[5,6],,[7,8],,,pH,PACpH1Ca2+H+F-F-Ca-H2O:CaF2(s)=Ca2++2F-Ksp=[Ca2+][F-]2(1)Ca2++F-=CaF+KCaF+=[CaF+][Ca2+][F-](2)H++F-=HFKHF=[HF][H+][F-](3)HF-+F-=HF-2KHF-2=[HF-2][HF-][F-](4):[F-]T=[F-]+[CaF+]+[HF]+[HF-2](5)(1)~(4)(5):[F-]T=KspCa2+1/2+KCaF-[Ca2+][F-]+KHF[H+][F-]+KHFKHF-[H+][F-]2=KspCa2+1/2{1+KCaF-[Ca2+]+KHF[H+]+KHFKHF-[H+]KspCa2+1/2}[Ca2+][F-][H+][OH-],;[CaF+][HF][HF-2]Ca2+F-H+F-;[F+]T,[F+]T[Ca2+][H+],matlab65[F+]T[Ca2+]pH(1)53第27卷第2期2011年4月湖南有色金属HUNANNONFERROUSMETALS图1[F+]T[Ca2+]与pH值的关系曲面图1,[F-]T[Ca2+],pH4,[Ca2+]160mg/L,[F-]T,[F-]TpH,pH4,[Ca2+]100mg/L,[Ca2+][F-]T,pH[F-]T221,F-243mg/L,pH122HJ-4,Delta320-SpH,,S40()221100mL,CaCl2PAC,2h,2100mL,pH65,CaCl2PAC,2h,3100mL,100mg/L90minPAC30min,4100mL,,100mg/L1000mg/LPAC,2h,233311816mg/L,79mg/L[9],10mg/L,10mg/L,,,,,,23图2氯化钙投加量除氟效果的影响(t=2h,T=25)1-pH=122;2-pH=65图3PAC投加量对除氟效果的影响(t=2h,T=25)1-pH=122;2-pH=652,,,Ca2+F-CaF2,,100mg/L,102mg/L,CaF2,,pH54湖南有色金属第27卷65,pH,Ca2+,Ca2+F-pH32(PolyaluminiumChloride,PAC)[Al2(OH)nCl6-n]m,n1~5,m!10,,,2~3,,,,pH7,PAC,pH,PAC,,[10]3,,Al3+F-Al(OH)3(am)F-,,1200mg/L,34mg/L,pH65,,400mg/L,362mg/L,PAC,33PACPAC4图4PAC对除氟效果的影响(T=25,pH=122,c(CaCl2)=100mg/L)4100mg/L90minPAC30min,PAC,10mg/L,PAC,,5mg/L345图5温度对除氟效果的影响(t=2h,pH=122)1-CaCl2;2-PAC5,,,,,,,,PAC41pH,pH2100mg/L,102mg/L,,,pH,100mg/L,PAC400mg/L,10mg/L3pH65,PAC400mg/L,362mg/L,GB8978-199655第2期杨际幸,等:CaCl2-PAC絮凝法处理含氟废水的研究4Ca+F-,PAC55:[1],,,CaCl2[J],1995,13(1):8-10[2],,,-[J],2008,24(11):76-79[3][J],1998,(4):14-17[4],,,[J],2010,(4):48-52[5],[J],2001,17(5):369-376[6],,,[J],1997,17(6):11-12[7],,[J],2000,20(6):709-713[8]MKarthikeyan,KKSatheeshKumar,KPElango,Conductingpolymer/aluminacompositesasviableadsorbentsfortheremovaloffluorideionsfromaqueoussolution[J]JournalofFluorineChemistry,2009,130(10):894-901[9],,,[J],1984,(4):200-204[10],,,A[J],2008,28(6):531-535:2011-03-05StudyonFluorideRemovalfromFluorideContainingWastewaterUsingCalciumChlorideandPACYANGJixing,YANGTianzu,ZHANGDuchao,DOUAichun(SchoolofMetallurgicalScienceandEngineering,CentralSouthUniversity,Changsha410083,China)Abstract:ThispaperdrawsthediagramofthetotalfluorideioninaqueoussolutionwithcalciumionandpHAndcombiningwithcalciumchloride,PACtoremovefluoridefromfluoridecontainingwastewater,ithasdiscussedtheeffectofcalciumchlorideandPACTheresultsshowthatwhenthedosageofCaCl2is100mg/L,thecontentoffluorideioninwastewatercanbereducedto102mg/L,whenthepHvalueis6-7,andthedosageofPACis400mg/L,thefluorideionconcentrationwas362mg/LIthassimultaneouslydiscussedtheeffectofPACwhen100mg/Lcalciumchloridereaction90minThetemperaturehaslittleeffectoncalciumfluoridetoremovefluoridewhilethePAChasthemosteffectiveat55Keywords:defluoridation;PAC;calciumchloride;coagulation(26)Abstract:Thepaperhasintroducedthebasictheoryandmainfacilitiesofzinchydrometallurgyacidleachingunderflowfiltration,andanalyzedthemainwayandmeasurestoreducethewatersolublezinc,whichhasacquiredbettereffectsKeywords:zinchydrometallurgy;acidleachingslag;watersolublezinc;filtration(30)TheApplicationResearchofFlocculatinZincHydrometallurgyProcessXIANGFeng(ZhuzhouSmelterGroupCoLtd,Zhuzhou412004,China)Abstract:Thispaperstudiestheuseofflocculatingagentofseveraltypicalsolutionsinzinchydrometallurgyprocess,andpicksoutthebesteffectiveflocculatingagentfromseveralflocculantsbycomparingtheeffectoftraditional3#flocculationwithsomenewhighmolecularflocculantsindifferentkindsofzincsulphatepulpKeywords:flocculat;overflow;underflow56湖南有色金属第27卷