Fenton接触氧化联合工艺处理铁合金镀件电镀前处理废水吴健良

811Vol．8No．11201411ChineseJournalofEnvironmentalEngineeringNov.2014Fenton-*1.5100062.510006。FentonCODCOD《》GB21900-20083。COD=300mg/L-83%COD50mg/L．pH=3.0COD/H2O2=1.5Fe2+/H2O2=2t=10min7hpH6～8。X703.1A1673-9108201411-4707-08TreatmentofironalloyelectroplatingpretreatmentwastewaterbyFenton-biologicalcontactoxidationprocessWuJianliangZengJianxinLanJunhongFangZhanqiang1.SchoolofChemistryandEnvironmentSouthChinaNormalUniversityGuangzhou510006China2.GuangdongTechnologyＲesearchCenterforEcologicalManagementandＲemediationofUrbanWaterSystemGuangzhou510006ChinaAbstractElectroplatingpretreatmentwastewaterwhichcontainedlargeamountsofrefractoryorganiccom-poundswastoocomplextobetreatedbytraditionalbiochemicaltechnology．Fentontechnologywhichcanre-ducethenon-biodegradableorganicmatterandenhancebiodegradabilityofthewastewaterwasusedasapre-treatmenttechnologythenthebiologicalcontactoxidationprocesswasusedasafurthertreatmentthatcanre-ducetheCODofeffluenttomeetelectroplatingpollutantsemissionstandards．TheCODofthiswastewaterwas300mg/Linthisexperimentwhichwastakenfromtheactualelectroplatingproduction．TheCODcouldbere-ducedtobelow50mg/LandtheCODremovalratewasmorethan83%undertheoptimumprocessconditions．TheoptimizeparametersofFentontreatmentwerepH=3.0COD/H2O2=1.5Fe2+/H2O2=2t=10min．TheoptimizeparametersofbiologicalcontactoxidationprocesswereHＲT=7hpH=6～8．KeywordsironalloyelectroplatingpretreatmentwastewaterFentonbiologicalcontactoxidationprocess2012B0310000152013－10－222013－11－201991—。[e-mail]*[e-mail]、、、。、3、。50%、、。、、1。8COD2。COD《》GB21900-20083COD3。。4。FentonFe2+/H2O2Fe2+H2O2·OH。Fe2++H2O2→Fe3++OH－+·OH+e－aq1Fe3++H2O2→Fe2++HO2·+H+22H2O2→·OH+HO2·+H2O3·OH56。Fenton。、78。Fenton。Fenton。11．1pHCOD。1．2pH=9．0COD=300mg/L。1．31．3．1COD/H2O2、Fe2+/H2O2、pHCOD。200、400600mL150L。1．3．270L。1/3pH2．80pH=7～8。。22．12．1．1H2O2pH3.030%H2O20.08、0.26、0.77、2.327.72mL/LFeSO4·7H2O0.13、0.43、1.29、3.8612.85g/L30min。pH9.010minCOD1。130%H2O20.08mL/LCOD40%COD150mg/L。30%H2O2COD。30%H2O20.77mL/LCOD60%COD110mg/L。30%H2O2COD。·OH30%H2O2·OHCOD。30%H2O2·OHCOD。30%H2O2Fe2+Fe3+Fe3+Fe2+Fe2+9。30%H2O20.77mL/LCOD100mg/L。30%H2O20.77mL/L。807411Fenton-1H2O2CODFig．1EffectsofH2O2dosageonCODremovalefficiency2．1．2Fe2+/H2O21FeSO4·7H2O。pH3.030%H2O20.77mL/LFeSO4·7H2O0.43、0.86、1.29、1.712.14g/L30min。pH9.010minCOD2。2FeSO4·7H2OCODFig．2EffectsofFeSO4·7H2OdosageonCODremovalefficiency2FeSO4·7H2O0.43g/L0.86g/L。FeSO4·7H2O0.43g/LCOD48%1.71g/L62%。FeSO4·7H2O2.14g/L60%。Fe2+Fe2+·OHFeSO4·7H2O1.71g/LFe2+·OH。Fe2+·OHFe2+·OH。·OH·OH10。FeSO4·7H2O1.71g/L。2H2O2。2．1．130%H2O20.77mL/LH2O230%H2O2COD/H2O2Fe2+/H2O2。pH3.030%H2O20.26、0.51、0.77、1.031.29mL/LFeSO4·7H2O1．71g/L30min。pH9．010minCOD3。330%H2O2CODFig．3Effectsof30%H2O2dosageonCODremovalefficiency330%H2O2COD0.51mL/L61%COD100mg/L。·OHH2O230%H2O20.51mL/LH2O2。H2O2·OHH2O2H2O2·OHH2O2·OH。·OH·OH·OHH2O211。30%H2O20.51mL/LFeSO4·7H2O907481.71g/L。COD/H2O21.5Fe2+/H2O22。2．1．3pHpH2.0、2.5、3.0、3.54.030%H2O20.51mL/LFeSO4·7H2O1.71g/L30min。pH9.010minCOD4。4pHCODFig．4EffectsofpHonCODremovalefficiencypHpHCODCOD。pH=2.0COD101mg/LCOD61%。pHCOD61%～62%COD100mg/L。pHpH=3.0pH=3．0pH=3.0COD63%。Fenton·OHpH=32.8VpH＞3pHpH=71.9V12。pH=3.0pH。2．1．4pH3．030%H2O20.51mL/LFeSO4·7H2O1.71g/L5、10、15、2025min。pH9.010minCOD5。COD。5minCOD55%5tCODFig．5EffectsofcontacttimeonCODremovalefficiency117mg/L。10minCOD56%15min58%20minCOD60%25minCOD100mg/L。10min。10min。t=10min。2．1．5100、200、400600mLpH3.030%H2O20.51mL/LFeSO4·7H2O1.71g/L10min。pH9.010minCOD6。6CODFig．6EffectsofvolumeonCODremovalefficiency017411Fenton-64COD60%。150LCOD61%。2．22．2．1COD115mg/L25%、50%、75%100%4COD38、57、88115mg/L。HＲT=7h1。CODCOD7。7CODCODFig．7CODremovalefficiencyindebugstage78CODCOD。2CODCOD。1～4COD4～8COD。Fenton13COD。115mg/LCOD14。2．2．21HＲT=3h。23L/hHＲT=3h2。、。CODCOD8。8COD115mg/L3h1COD70mg/L2CODCOD65～70mg/L。COD15COD。15。HＲT=3hCOD70mg/LCOD50%。8HＲT=3hCODCODFig．8CODremovalefficiencyofHＲT=3h2HＲT=5h。14L/hHＲT=5h2。。CODCOD9。9COD115mg/L5h1CODHＲT3h。15。2COD50～70mg/L。HＲT=5h117489HＲT=5hCODCODFig．9CODremovalefficiencyofHＲT=5h。3HＲT=7h。10L/hHＲT=7h3。。。CODCOD10。10COD115mg/LCOD1～2COD50mg/L16COD。COD。3CODCOD50mg/L。10HＲT=7hCODCODFig．10CODremovalefficiencyofHＲT=7h3Fenton-H2O2H2O2+2。+。、、、、。。1+1210。+。12Table1Costcomparisonoftwotechnologies+H2O27．72mL/L0．51mL/L1000/t1000/t8．57/t0．56/t12．85g/L1．71g/L240/t240/t3．08/t0．41/t11．65/t0．97/t+。CODCOD40%。17BMCOD45.0%。182hCOD74.5%。199h8hCOD75.1%。+COD86.7%217411Fenton-。FentonFentonpH=3.030%H2O20.51mL/LFeSO4·7H2O1.71g/LCOD/H2O2=1.5Fe2+/H2O2=2t=10min。7h。FentonFenton2。2FentonTable2ComparisonofbiodegradabilitybeforeandafterFentonandbiologicalprocessFentonCODmg/L30011540BOD5mg/L744412BOD5/COD0．250．380．30+CODCOD115mg/L。《》GB21900-2008COD50mg/L7h。4-COD《》GB21900-20083pH=3COD/H2O2=1．5Fe2+/H2O2=2t=10min7h。1．．200733220-22ZhaoNaLiYafengJiaXinjunetal．Designforelectro-platingwastewatertreatmentproject．IndustrialSafetyandEnvironmentalProtection200733220-22inChi-nese2．．200625638-41LuHuaFanWeifengWuYiwenetal．Ｒesearchonprocessoforganicpollutantremovalinplatingwastewater．ElectroplatingandFinishing200625638-41inChinese3．．201138248-57ZhaoXuanZhangBeiLiChen．Ｒesearchprogress