电镀废水中络合物对化学需氧量测定的影响刘晓星

1001-3849201103-0041-04116026。。。。X703．1B2010-09-272010-11-10InfluenceofComplexinElectroplatingWastewateronCODDeterminationLIUXiao-xingXUHai-xuWANGYiZHAOLeiCollegeofEnvironmentalScience＆EngineeringDalianMaritimeUniversityDalian116026ChinaAbstractTheinfluenceofcomplexformationonthechemicaloxygendemandCODwasinvestigatedandseveralchemicalferroussulfateandsodiumsulfideandphysicalpulsedischargemethodswereappliedtobreakthecomplex．TheexperimentalresultshowsthatthemeasuredCODislowerthanthere-alCODunderthepresenceofcomplexinwastewater．Keywordscomplexchemicaloxygendemandcomplexbreakingmethodelectroplatingwastewater、、、1、2。200881《》GB21900-200813。、、。、3。4-9。·14·20113333216COD。COD。CODCODCOD。11．1、、、、98%、、、、EDTA。1．2EDTA。1．3、、、。COD1。1COD1．4GB/T11914-1989。。CODcrCOD=V0－V1×c×8×1000/VV1mLV0mLVmLcmol/L8。CODCODmg/L。22．1CODCu2+、Zn2+Cu2+Zn2+。EDTACOD。Cu2+CODCOD。0．05mol/LZn2+0．05mol/LEDTA10mlVZn2+∶VEDTA=1∶1COD。EDTACOD2880mg/LZnSO4+EDTACOD2600mg/LCOD。EDTAEDTA-ZnA=0．1308-cEDTA-ZnEDTA-ZnK=cEDTA-Zn/cZn2+×cEDTA=2．5×1016cZn2+=1．58nmol/LEDTA。2．2COD。0．01mol/LCu2+0．01mol/LEDTA0．01mol/LZn2+0．01mol/LEDTA。12。FeSO4Fe2+pH=2～3Cu2+Cu+Cu+OH－810。pH=9～10Na2SS2-Cu2+EDTACuS11。·24·Mar．2011PlatingandFinishingVol．33No．3SerialNo．2161CODEDTACOD。2。1ρCOD/mg·L－1EDTA2968+EDTA1824329230542ρCOD/mg·L－1EDTA2968Zn+EDTA2344227032182．3COD、·OH、、H2O2。、、、。2．8nF0～60kV0～300Hz。1222U28kVf30Hz350mL。34COD。15minCOD·OHCOD。·OHC—C、C—H、C—N、C—ON—H15minCOD。3+EDTA4+EDTA3CODCODCOD。。。1．M．·34·2011333321619892-6．2LiguoriCasseseBAColellaCSafeimmobilizationofCrIIIinheat-treatedzeolitetuffcompactsJ．JournalofHazardousMaterials2006B1371206-1210．3．M．2004271-273．4KongsricharoernNPolprasertCElectrochemicalprecipi-tationofchromiumCr6+fromanelectroplatingwastewaterJ．WaterScienceandTechnology1995319109-117．5．J．200325629．6．J．200626336-37．7．J．200662141-143．8．J．2005193184-187．9AjmalMRaoRAKAhmadRetal．Adsorptionstud-iesonCitrusreticulatafruitpeeloforangeremovalandrecoveryofNiIIfromelectroplatingwastewaterJ．JournalofHazardousMaterials2000792117-131．10Li-YangChang．Awasteminimizationstudyofachelatedcoppercomplexinwaste-watertreatabilityandprocessanalysisJ．WasteManagement1995153209-220．11．PCBJ．2007646-48．12．D．2009櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅殯殯殯殯65．φoFe2+/Fe=－0．44VFeO、Fe2O3Fe3O4。。、。。。H2SO4d=1．84150～180mL/LHNO3d=1．42350～420mL/LLD-6030～50mL/Lθt3～5minLD-60。H2O230%100～150mL/LH2SO4d=1．841～3mL/LH3PO4d=1．73～5mL/L10～15g/LLD-8630～50mL/LpH2～3θ＜40℃t3～8minLD-86、。10%～20%H2SO4。30g/L20g/L。、。·44·Mar．2011PlatingandFinishingVol．33No．3SerialNo．216