电Fenton装置的优化与焦化废水的深度处理彭瑞超

－Fenton*彭瑞超于萍罗运柏430072FentonpH、、Na2SO4H2O2。pH33～9VH2O2140minH2O260minH2O226.6mg/LH2O2H2O2。A2OpH39V30mmNa2SO45g/L600mL/LFe2+0.2mmol/L2hCOD82.5%。FentonDOI10.13205/j．hjgc．201405003OPTIMIZATIONOFELECTＲO-FENTONSYSTEMANDADVANCEDTＲEATMENTOFCOKINGWASTEWATEＲPengＲuichaoYuPingLuoYunbaiCollegeofChemistryandMolecularScienceWuhanUniversityWuhan430072ChinaAbstractInanelectrochemicalreactorusingTimeshasanodetheactivatedcarbonfiberascathodeandNa2SO4assupportingelectrolytetheelectrochemicalgenerationofH2O2wasstudied．TheinfluencingfactorsofinitialpHvoltagethegasflowandconcentrationofNa2SO4wereinvestigatedindetails．ＲesultsindicatedthatthegeneratedamountofH2O2increasedwiththeappliedvoltagewhenpHwas3andremainednearlyconstantafter60minwiththemaximumof26.6mg/L．ThedissolvedoxygencontentinthesystemisanecessaryconditionofgeneratingH2O2SoH2O2concentrationincreasedwiththegasflow．Advancedtreatmentofcokingwastewaterafteraerobictreatmentbyelectro-Fentonoxidationprocesswascarriedout．UndertheoptimumparametersdeterminedasinitialpHof3voltageof9Vthedistanceofcathodeandanodeplate30mmtheNa2SO4concentrationof5g/Lthegasflowof600mL/LandthedosagesofFeSO40.2mmol/LCODremovalefficienciesreached82.5%after2h'streatment．Electro-Fentonoxidationprocessisprovedtobeaneffectivemeansforadvancedtreatmentofcokingwastewater．Keywordsactivatedcarbonfiberhydrogenperoxideelectro-Fentoncokingwastewater*2011003。2013－07－190。1。FentonO2H2O2Fe2+·OHFe3+Fe2+H2O2Fenton2。FentonFenton。H2O2FentonFenton。4-7、、5-6、、、3。H2O2。01EnvironmentalEngineeringFentonH2O2pH、、、、H2O2A2OFenton。11.1废水来源A2OpH6～7ρCOD150～180mg/L。1.2装置与方法－Fenton1L40mm×90mm30mmNa2SO43mol/LpH、2.5h20min5mLH2O2。－Fenton1LH2O2FeSO40.5hNaOHpH830minCOD。1.3分析方法H2O28CODGB/T11914—1989。22.1阴极电生H2O2电极材料对比pH37V400mL/min30mmNa2SO410g/LH2O21。10～60minH2O260minH2O2。H2O2H2O2。H2O2H2O2H2O29H2O2。60minH2O2H2O2H2O2。1H2O2Fig．1EffectofdifferentcathodematerialsonH2O2generationH2O2。Qiang10H2O2。H2O2。2.2影响因素2.2.1pHO2+2H++2e－→H2O2pHH2O2。27V400mL/minρNa2SO45g/LpH3、4、6、8H2O2。2pHH2O2Fig．2EffectofinitialpHonH2O2generation2H2O2pH。pH3H2O226.6mg/L。pH8H2O2。pHFe2+Fe3+FeOH311WaterPollutionControl。H2O2FentonpH3。pHH2O2H3O+2H2O2Fe2+11。2.2.2pH3ρNa2SO45g/L400mL/minH2O23。3H2O2Fig．3EffectofappliedvoltageonH2O2genearation3H2O2。120minH2O217.520.124.126.6mg/L。H2O2。H2O2H2O2。9V。2.2.3pH39VρNa2SO45g/L140min200400600mL/minH2O24。4H2O2。H2O2H2O2。H2O2。H2O24H2O2Fig．4EffectofgasflowonH2O2generation400mL/min600mL/minH2O2。600mL/min。2.2.4Na2SO4－FentonNaCl、Na2SO4Na2SO4。pH39V600mL/min51020g/LNa2SO4H2O25。5Na2SO4H2O2Fig．5EffectofNa2SO4dosageonH2O2generation5Na2SO4H2O2。Na2SO4H2O260minH2O2。－Fenton21EnvironmentalEngineering。ρNa2SO45g/L。3－Fenton－FentonA2O。pH39V600mL/minNa2SO45g/L30mmρCOD160mg/LFe2+COD6。6Fe2+CODFig．6EffectofFe2+concentrationonCODremovalefficiency6FeSO4H2O2COD60minCOD23.75%。H2O2。FeSO4Fe2+H2O2·OH2.70V2.87V、CO2。Fe2+0.2mmol/L150minρCOD160mg/L28mg/LCOD82.5%。cFe2+=0.5mmol/LCOD71.8%Fe2+·OH。H2O2－FentonCOD。41H2O2。－FentonpH360minH2O226.6mg/L。2H2O2H2O2。H2O2H2O2。Na2SO45～20mg/LH2O2。3pH39V30mm5g/L600mL/LFe2+0.2mmol/LA2O120minCOD82.5%－Fenton。1．－FentonJ．20042429-13.2．－FentonJ．20093535-9.3．－FentonJ．20123025-975.4．－FentonH2O2J．200935109-10.5．－FentonJ．200424433-36.6．－FentonJ．201041413-16.7．H2O2－FentonJ．20103611-615.8GallardHDeLaatJ．KineticmodellingofFeIII/H2O2oxidationreactionsindiluteaqueoussolutionusingatrazineasamodelorganiccompoundJ．WaterＲesearch200034123107-3116.9BrillasECalpeJCCasadoJ．Mineralizationof24-DbyadvancedelectrochemicaloxidationprocessesJ．WaterＲesearch20003482253-2262.10QiangZChangJHHuangCP．ElectrochemicalgenerationofhydrogenperoxidefromdissolvedoxygeninacidicsolutionsJ．WaterＲesearch200236185-94.11HsuehCLHuangYHWangCCetal．DegradationofazodyesusinglowironconcentrationofFentonandFenton-likesystemJ．Chemosphere200558101409-1414.。[e-mail]1963－。[e-mail]31WaterPollutionControl