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胡君 顾平道( 201620) 3,,3,COD,。,C,40002.75g,pH11,COD,95%79%。 PreparationofLow-costMagneticFluidUsingintheTreatmentofDyeingWastewaterHUJun GUPingdao(SchoolofEnvironmentalScienceandEngineering,DongHuaUniversity Shanghai201620)Abstract Threekindsofprecipitatordustselectedfrommetalworkingindustriesareusedtopreparativewater-basedmagneticfluidwiththemethodofchemicalcoprecipitation.Dyeingwastewateristreadedbythesethreekindsofmagneticfluid,inwhichthevalueofchromaandCODisre-gardedasstudybasisandthebetterprecipitatordustiselectedaslow-costmagneticseed.TheresultsshowthatduringthepreparationofmagneticfluidusingprecipitatordustC,thedosageofPEG-4000is2.75g,thevalueofpHis11,theremovalefficiencyisthebest,chromaandCODremovalrateis95%and79%respectively.KeyWords precipitatordust magneticfluid dyeingwastewater 3×106～4×106m3/d,35%,1%[1]。,3.2×1010m3。,,PVA、,COD[2]。,,[3]。[4],COD88%,95%。,。[5]“”,。,COD。1 1.1 3,A、BC。3、,1。1.2 [6]。,A、BC48.5g、34g20g,1.5mol/LH2SO4200mL,,65℃,1 ()%(Fe3+)(Fe2+)n(Fe3+)/n(Fe2+)A22.415.472.2∶1B31.915.216.71∶1.1C54.330.723.61.3∶1NaOHpH,2～3,10min,pH,,4000(PEG4000),。、、,。2 2.1 、PVA(),2。2 COD/(mg·L-1)/pH/℃1000～1200800～10004～515～252.2 35mL100mL,、,(HT-20,220mT),1min,,,COD。COD·14· IndustrialSafetyandEnvironmentalProtection 2010365May2010。3 3.1 1210～100mg/mL3COD。,C2,;C60mg/mL,COD88%72%。AB40mg/mL70mg/mL,66%78%,COD50%66%。1 2 COD3.2 341.5～4g,3COD。,A、BC2g、3.5g2.75g,COD,,。3 4 COD3.3 pHA、BC48.5g、34g20g,1.5mol/LH2SO4200mL,,NaOHpH7～13,,2g、3.5g2.75g。COD56。,3,pH11,COD,CCOD,95%79%。5 pH6 pHCOD4 (1),,。(2)3pH11,。(3)C,40002.75g,pH11,COD,95%79%。[1],,,.[J].,2000,6(10):65-67.[2],,.[C].,2005.[3],,,.[J].,1997(6):52-53.[4],.[J].,2007,20(6):14-16.[5],,.[J].,2000,16(8):33-35.[6],,.[J].,2003,1(9):21-23. 胡君,男,1983年生,上海人,东华大学环境科学与工程学院在读硕士研究生,从事污水处理研究。(:2009-05-19)(赵天奇)·15·