钴离子共存对造粒共沉淀微滤除锶的影响龚佳豪

/，，(，300072)/(PCM)，、。，PCM(DF)747，(CF)1370。、，PCM、DF1692587，CF1020，，，，(SF)。，、，，，DF。;;;;;[e-mail]ontiumＲemovalinPelletCoprecipitation/MicrofiltrationProcessGONGJia-haoZHANGGuang-huiGUPingSchoolofEnvironmentalScienceandEngineeringTianjinUniversityTianjin300072ChinaAbstractTheeffectofcobaltasacoexistingiononstrontiumremovalinpelletcoprecipitation/microfiltrationprocessPCMwasdiscussedandthefeasibilityofreplacingwastewatercontainingstron-tiumwithwastewatercontainingcobaltandstrontiumwasstudiedfromtheaspectsofseedcrystalcharac-teristicsandstrontiumremovaleffect．ForthewastewatercontainingstrontiumpurelytheDFofstrontiumwithPCMwas747andtheconcentrationfactorCFwas1370．AscobaltcoexistedwithstrontiumtheDFofcobaltandstrontiumwere1692and587respectivelyandtheCFwas1020．Theprecipitatepelletsproducedhadsmallparticlesizesandwerehardtosettleleadingtohighturbidityofreactor’sef-fluentwhichcausedmorerapiddecreaseinSF．ComparedtowastewatercontainingstrontiumtheseedcrystalsproducedfromwastewatercontainingcobaltandstrontiumhaddisadvantagesofsmallsizesandnoncentralizeddistributionandtheDFofstrontiumtrendedtobereducedwhenusedtotreatlargequan-tityofwastewater．Keywordsradioactivewastewatercobaltstrontiumpelletmethodcoprecipitationmicrofiltration。1、2、、、34。、5、·14·3223201612CHINAWATEＲ＆WASTEWATEＲVol．32No．23Dec．20166、7、/8、9、/10。/PCMCaCO3Na2CO3CaCO3SrCO3FeCl3DFDF577CF195811。、、、Jin12PCMDF559CF1000DF4600。、PCMPCM。11.1SrCl2·6H2O10mg/LCoCl2·6H2O、SrCl2·6H2O、Co2+、Sr2+510mg/L。PCM13。PCM12。1PCM2、PCM。、PCM34。34、30、。1。1Tab．1Qualityofrawwastewater1234Sr2+/mg·L－113．3913．9410．5311．01Co2+/mg·L－105．7895．7046．222Ca2+/mg·L－147．3146．4448．1247．59Mg2+/mg·L－122．7922．2323．1022．01/℃262615151.21。9．8L0．25m。14．7LPVDF0．22μm1mm0．5m2。1/Fig．1Schematicdiagramofpelletcoprecipitation－microfil-trationprocess12．5L/h1．75h0．55h1．2h。。CaCO3Na2CO31g/L30、。PLC、、、、、。11。1.3、。DFCF。DF=Ci/Ce1CF=Vr/Vs2Ci———mg/LCe———mg/LVr———LVs———24hLSF。η·24·3223．watergasheat．comη=SF0－SFfV/A3SF0SFf———L/h·m2·mV———LA———m222.1PCM2.1.1PCM2。12900600L。119．5314．19μg/LDF747945224．8219．85μg/LDF587712。PCMPCM。2Fig．2ConcentrationofstrontiuminmembraneeffluentCO2－3Ca2+Sr2+CO2－3SrCO3SrCO3CaCO3·SrCO3SrCO3。Sr2+Ca2+Sr2+Ca2+SrxCa1－xCO314。CoCO3CoOH2Co2+CO2－3CoCO3pH10．5Co2+OH－CoOH2。CoCO3CoOH2CaCO3·SrCO3SrCO3SrCO3CaCO3·SrCO3。CaCO3CaCoCO3。CaCO3CaCoCO3CaCO3·SrCO3Sr2+DF。2PCM2．5～4．5μg/L3．529μg/LDF1692。2.1.21、23。3Fig．3Particlesizedistributionsforsediments3、1、234．674、60．25634．674μm12．4%、20．4%8．28%。12。CoOH2CoCO3CaCO3·SrCO3。CoOH2CoCO3CaCO3·SrCO3。。。PCM1、224hCF·34·．watergasheat．com，:/322313701020。PCM。2.1.317．55～8．75NTU219NTU56NTU32．7NTU。CoCO3CoOH2CaCO3·SrCO3。1、24。4Fig．4SFofmembraneduringwholeperiodSF。SF。11781LSF50．6L/h·m2·m20．2L/h·m2·m8．53×10－3h·m－121806LSF68．3L/h·m2·m28．0L/h·m2·m11．16×10－3h·m－1。211SSFeCl3FeOH3。2.22.2.13、4302。2Tab．2Particlesizedistributionsforseedsμm32．51291．2034．6735．6040．417208．9319．5322．503、34．67μm12．37%4、19．53μm6．96%34。4、。。2.2.2、3、4、PCM、DF3。3、DFTab．3DFsofstrontiumandcobaltinmembraneeffluent34Sr2+Co2+Sr2+Co2+/μg·L－123．647．49926．117．096/μg·L－116．216．59919．896．679DF488767436878DF650864554931334DF76787899．87%99．89%。DF。3423．6426．11μg/LDF488436、。34。4、。、。·44·3223．watergasheat．com3①CaCO3·SrCO3DFDF747、DF587。26℃DF1692。②CF1000。③SS。④、。1VolkovichVAGriffithsTＲThiedＲC．TreatmentofmoltensaltwastesbyphosphateprecipitationremovaloffissionproductelementsafterpyrochemicalreprocessingofspentnuclearfuelsinchloridemeltsJ．JNuclMa-ter2003323149－56．2DeliDLawKLiuZetal．Selectiveremovalof90Srand60CofromaqueoussolutionusingN-aza-crownetherfunctionalpolyNIPAMhydrogelsJ．ＲeactFunctPolym2012726414－419．3HereijgersJVandermeerschTVanOeterenNetal．SeparationofCoⅡ/NiⅡwithCyanex272usingaflatmembranemicrocontactorExtractionkineticsstudyJ．JMembrSci2016499370－378．4KhayetM．TreatmentofradioactivewastewatersolutionsbydirectcontactmembranedistillationusingsurfacemodifiedmembranesJ．Desalination20133211560－66．5MaBShinWSOhSetal．AdsorptiveremovalofCoandSrionsfromaqueoussolutionbysynthetichydroxyapatitenanoparticlesJ．SepSciTechnol2010454453－462．6MaBOhSShinWSetal．ＲemovalofCo2+Sr2+andCs+fromaqueoussolutionbyphosphate-modifiedmont-morillonitePMMJ．Desalination20112761/3336－346．7ParkYShinWSChoiS．Ｒemovalofcobaltandstron-tiumfromgroundwaterbysorptionontofishboneJ．JＲadioanalNuclChem20132951789－799．8TayyebiAOutokeshMMoradiSetal．Synthesisandcharacterizationofultrasoundassisted“grapheneoxide－magnetite”hybridandinvestigationofitsadsorptionpropertiesforSrⅡandCoⅡionsJ．ApplSurfSci20153531343350－362．9ImessaoudeneDHaniniSBouzidiA．BiosorptionofstrontiumfromaqueoussolutionsontospentcoffeegroundsJ．JＲadioanalNuclChem20132982893－902．10HashemianSSaffariHＲagabionS．AdsorptionofCo-baltⅡfromaqueoussolutionsbyFe3O4/BentonitenanocompositeJ．WaterAirSoilPollut201522612212－2216．11LuoXZhangGWangXetal．Ｒesearchonapelletco-precipitationmicro-filtrationprocessforthetreatmentofliquidwastecontainingstrontiumJ．JＲadioanalNuclChem20132982931－939．12JinXGuPZhangGetal．Ｒemovalofnickelandstrontiumfromsimulatedradioactivewastewaterviaapelletcopr