电絮凝超滤除氟工艺参数优化研究

97Vol．9No．720157ChineseJournalofEnvironmentalEngineeringJul．2015-122*1121．3004012．100085-electrocoagulation-ultrafiltrationEC-UF。EC-UF、、pH、。EC-UF30A/m2、20min、pH6．0～7．080%。。EC-UF。X703A1673-9108201507-3093-06Studyofparametersoptimizationindefluoridationbyelectrocoagulation-ultrafiltrationprocessWangShuqing12HuChengzhi2YangChunfeng1LiJing1LiuHuiJuan21．SchoolofCivilEngineeringHebeiUniversityofTechnologyTianjin300401China2．KeyLaboratoryofAquaticScienceandTechnologyＲesearchCenterforEco-EnvironmentalSciencesChineseAcademyofSciencesBeijing100085ChinaAbstractTheelectrocoagulation-ultrafiltrationprocessEC-UFhasbeenrecognizedasapromisingmeth-odforthefluorideremovalfromdrinkingwater．TheremovalefficiencyoffluoridebyEC-UFandcorrespondingmembranefoulingwasinvestigated．SimultaneouslyeffectsofcurrentdensityhydraulicretentiontimeinitialpHvaluesandinitialfluorideconcentrationwereinvestigated．TheresultsindicatedthatinthecontinuousrunningthefluoridecanbelargelyremovedbytheEC-UFprocess．Theremovalrateoffluoridewasupto80%withopti-mizingthecurrentdensityof30A/m2hydraulicretentiontimeof20minandinitialpHof6．0—7．0．Itwasob-servedthatthemembranefoulingwasmainlycausedbytheparticulatesofthealuminumcoagulantsinelectrolyticprocessandfluorideions．TheaboveresultsprovideareferenceandbasisforEC-UFdefluoridationprocessim-provement．Keywordselectrocoagulationultrafiltrationdrinkingwaterfluoridemembranefouling13Z02-ESPCT“”2012ZX07414-0012014－05－122014－06－021987—。[e-mail]*[e-mail]。1。。、、2。3。4567。8-。HuKang9、、。-9。-electrocoagulation-ul-trafiltrationEC-UFJ、hydraulicretentiontimeHＲT、pH、EC-UFEC-UF。11．1、120mm×65mm×2mm。。PVDF100kDa。NaFCF-=5．0mg/LNaCl0．05mol/LNaHCO30．5mmol/L。pH0．1mol/L1mol/LHClNaOH。1．21。1Fig．1SchematicrepresentationofEC-UFprocess115mm×60mm×140mm450mL20mm105mm68cm2。22。1．3DH1720A-6pHpH720AThermoOrionUSA10TMPTMP-ICP-OESOPTI-MA-2000PerkinElmerUSASEM-EDS。。1．3mol/LHCl。-pH7．0J30A/m2hydraulicretentiontimeHＲT20min20mm5．0mg/L。22．1EC-UFEC2。2aEC-UF10min85%85%0．01mg/L。EC80%。。2b240min。11。2．23a。312Al=nItMAlZFV1Alg/LIAt。1。313、。3b。49037-J=30A/m2HＲT=20minpH0=7．02Fig．2EffectofUFondefluoridationbyECHＲT=20minpH0=7．03Fig．3EffectofcurrentdensityondefluoridationbyEC、。J=30A/m2。2．3HＲT4a。1312、。4bHＲT=20min。J=30A/m2pH0=7．04Fig．4EffectofHＲTondefluoridationbyEC2．4pHpHEC-UF5。pHpH0=6。pHpHAl3+、AlOH32。Al3+→AlOHn3－n+→Al2OH4+2→Al13→AlOH3259039Al1314-16EC-UF。pH。pHOH－OH－1。5bpHpH、。pH0=4pH。J=30A/m2HＲT=20min5pHFig．5EffectofinitialpHondefluoridationbyEC2．56a。3．0mg/L5．0mg/LEC-UF7．0mg/L80%。。11718。6b。6HＲT=20minpH0=7．0Fig．6EffectofinitialfluorideconcentrationondefluoridationbyEC2．67。7a、7c7e、、1119SEM7b、7d7fEDS7g7h。PVDF50%。69037-7HＲT=20minpH0=7．0J=30A/m2Fig．7Characteristicsofmembraneunderdifferentconditions、、11。7d。、、。7c7a7d7b、79039、。7e7f。7g7h。。EC-UF。31-。2。J=30A/m2、HＲT=20min、pH6．0～7．080%～86%。3。1．/．2012GongWenxin．Speciesinteractionsbetweenaluminiumandflu-orideandthemechanismoffluorideremovalbycoagulationandadsorption．BeijingDoctorDissertationofGraduateUni-versityofChineseAcademyofSciences2012inChinese2．．20073HarifT．KhaiM．AdinA．ElectrocoagulationversuschemicalcoagulationCoagulation/flocculationmechanismsandresultingfloccharacteristics．WaterＲesearch201246103177-31884．．20065．．20086GamageaN．P．ChellamS．Aluminumelectrocoagulationpretreatmentreducesfoulingduringsurfacewatermicrofil-tration．JournalofMembraneScience20113791-297-1057TanneruC．ＲimerJ．ChellamS．Sweepflocculationandadsorptionofvirusesonaluminumflocsduringelectrochem-icaltreatmentpriortosurfacewatermicrofiltration．Environ-mentalScience＆Technology20134794612-46188．-．20074791495-1497LiJingboZhaoXuanLiFuzhi．Defluoridationofdrinkingwaterusingelectrocoagulation-microfiltration．JournalofTs-inghuaUniversityScienceandTechnology20074791495-1497inChinese9HuKangDicksonJ．M．Nanofiltrationmembraneperform-anceonfluorideremovalfromwater．JournalofMembraneScience20062791-2529-53810．4．200211ZhaoBingqingWangDongshengLiTaoetal．Influenceofflocstructureoncoagulation-microfiltrationperformanceEffectofAlspeciationcharacteristicsofPACls．SeparationandPurificationTechnology201072122-2712HuC．Y．LoS．L．KuanW．H．Effectsofco-existingani-onsonfluorideremovalinelectrocoagulationECprocessusingaluminumelectrodes．WaterＲesearch200337184513-452313HarifT．AdinA．Sizeandstructureevolutionofkaolin-AlOH3flocsintheelectroflocculationprocessAstudyu-singstaticlightscattering．WaterＲesearch201145186195-620614CaizaresP．MartínezF．JiménezC．etal．Comparisonofthealuminumspeciationinchemicalandelectrochemi-caldosingprocesses．Industrial＆EngineeringChemistryＲesearch200645268749-875615WangDongshengSunWeiXuYongxiaoetal．Speciationstabilityofinorganicpolymerflocculant-PACl．ColloidsandSurfacesAPhysicochemicalandEngineeringAspects20042431-31-1016ZhaoHeLiuHuijuanQuJiuhui．EffectofpHonthealu-minumsaltshydrolysisduringcoagulationprocessForma-tionanddecompositionofpolymericaluminumspecies．JournalofColloidandInterfaceScience20093301105-11217ZhaoHuazhangYangWeiZhuJunetal．Defluoridationofdrinkingwaterbycombinedelectrocoagulation．EffectsofthemolarratioofalkalinityandfluoridetoAlIII．C