ClO2对医院高浓度含氰废水处理的试验研究

ClO2(,271000)(,250014),+ClO2,,,CN-GB897821996,ClO2ExperimentalstudyofClO2inthetreatmentofwastewatercontaininghighconcentrationcyanogensfromhospitalsLiZhifu1XuNing1MengQingjian1MengLin2(1.SchoolofChemistryandChemicalEngineering,TaishanMedicalCollege,Taian271000;2.CollegeofChemistry,ShandongTeachersUniversity,Jinan250014)AbstractAcombiningprocessconsistingofprimarychemicaltreatmentofironvitriol2diffuseandsecondarydeepoxidationofchlorinedioxidewasadoptedintreatingwastewatercontaininghighconcentrationcyanogensfromhos2pitals.Aftertreatment,thewastewatercontainingcyanogenswasnotonlynonpoisonous,butcouldberecycledandreused.ResultsobtainedfromthetestshowthattheconcentrationofCN-reachesthefirstorderofeffluentdischargestandard(GB8978298)andanewmethodtotreatwastewatercontaininghighconcentrationcyanogensfromhospitalsisprovided.Keywordswastewatercontainingcyanogens;primarychemicaltreatment;secondaryoxidationtreatment;chlo2rinedioxide:2003-10-01;:2003-12-22:(1968),,,,,E2mail:[e-mail]1,(CN-200mg/L),,,,[1],HCN50mg,NaCN100mg,KCN120mgCN-015011mg/L,,012mg/L,,,[2],CN-,(CN-50mg/L),[3](CN-200mg/L),,+,CN-,,,ClO2,CN-CO2N2,,CN-1012mg/L0124mg/L,61Vol.6,No.120051TechniquesandEquipmentforEnvironmentalPollutionControlJan.2005©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[4],NaOH,:6CN-+3FeSO47H2O=Fe2[Fe(CN)6]+3SO2-4+21H2O3Fe2[Fe(CN)6]+2H2SO4+O2=Fe4[Fe(CN)6]3+2FeSO4+2H2OFe4[Fe(CN)6]3+12NaOH=3Na4[Fe(CN)6]10H2O+4Fe(OH)32.2,CN-,CN-,NaOHpH,1011,ClO2CN-CO2N2[5]:2ClO2+2CN-=2CO2+N2+2Cl-33.1D28401,FeSO47H2O,CN-,Fe2[Fe(CN)6],H2SO4pH45,,610m3/min,Fe2[Fe(CN)6]Fe4[Fe(CN)6]3,,;,NaOHpH1011,ClO2,CN-CO2N2,,1Fig.1Processflowdiagramoftreatmentofwastewaterwithhighconcentrationcyanogens3.23.2.1CN-GB74862872[6]751580nm,,CN-3.2.2pHpHS23CpH,E22072C652AcpH[7]3.3,CN-257mg/L,pH7159.544.14.1.1FeSO4CN-,(25),1000mL6,FeSO47H2O,30min,80r/min,,CN-,22,FeSO47H2O,CN-,FeSO47H2O951:ClO2©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(25),1000mL6,,112gFeSO47H2O,,,30min,CN-,33CN-Fig.3EffectofstirringintensityonCN-removal3,,80r/min,CN-,,,;,,,4.1.3CN-61000mL,(25),112gFeSO47H2O,,80r/min,CN-,44CN-Fig.4EffectofstirringtimeonCN-removal4,,CN-40min,CN-,,,3040min4.1.4CN-(25),,pH5,,610m3/min,CN-,55CN-Fig.5EffectofaerationtimeonCN-removal5,CN-,20min,CN-1012mg/L,,CN-,,20min066©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(25),pH10,15min,ClO2CN-,11ClO2CN-Table1EffectofClO2dosageonCN-removalClO2(g/L)CN-(mg/L)CN-(%)1010.20020.0154.405730.0300.859140.0450.2497.550.0600.2397.71mg/LCN-3mg/LClO2,ClO2ClO2,ClO2,ClO201045g/L,CN-,CN-,ClO201045g/L4.2.2pHCN-(25),ClO201045g/L,15min,NaOHpH,pHCN-,66pHCN-Fig.6EffectofpHonCN-removal6,pH10CN-0124mg/L,CN-,pH,CN-,1011pH4.2.3CN-(25),ClO201045g/L,pH10,CN-,22CN-Table2EffectofoxidationtimeonCN-removal(min)CN-(mg/L)CN-(%)1010.200253.80633101.50854150.2497.55200.21982,15min,CN-GB897821996015mg/L,,,ClO2(ClO-2)(ClO-3),ClO2[8]4.2.4ClO2CN-(25),ClO201045g/L,pH10,15min,ClO2CN-,77ClO2CN-Fig.7EffectofdifferentClO2dosingmethodsonCN-removal7,ClO2,CN-,(67)161:ClO2©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(2)pH,30,2BV/h,CODCr20000mg/L,6000mg/L,1300mg/L,NDA2800,CODCr100mg/L,015mg/L,,,,(3)60,115BV/h,1BV8%NaOH+4BVH2O,99%,NDA28002,,,,t518kg1125kg,,[1]..,2000,(3):3337[2]DavankovV.A.,TsyurupaM.P.Structureandpropertiesofporoushypercrosslinkedpolystyrenesorbentsstyrosorb.PureAppl.Chem.,1989,61(11):18811888[3]DavankovV.A.,TsyurupaM.P.Structureandpropertiesofporoushypercrosslinkedpolystyrene2thefirstrepresentativeofanewclassofpolymernetworks.ReactivePolym.,1990,13:2742[4]BercicG.,PintarA.Desorptionofphenolfromactivatedcar2bonbyhotwaterregeneration,desorptionisotherms.IndustrialEngineeringandChemistryResearch,1996,35:46194625[5],,11:,1990[6],,11:,2000[7],,,1NDA21001,2002,22(5):658660(61),ClO2,ClO2CN-,,ClO2,ClO2CN-,CN-,CN-,CN-5(1),CN-97%CN-015mg/L,GB897821996(2):,FeSO47H2O112g/L,80r/min,3040min,20min,ClO201045g/L,pH1011,15min,ClO2[1],,,..:,200214344[2],..:,20011106[3],,,..:,20001214[4]..:,20011552[5],,,..:,20031161162[6],,..:,200119093[7].(3).:,1997[8],.ClO2.,2003,4(5):2326761:©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.