化学沉淀法回收化学镀镍废水中镍的研究施银燕

T-80,STPPSA,Fe3O4。STPPFe3O4,。(4):STPPFe3O4,,。:[1]　,,.[J].,2007,39(10):5-7.[2]　,,,.[J].:,2006,32(2):173-176.[3]　,,.[J].,2006,35(3):25-27.[4]　,,.[J].,2007(5):31-35.[5]　,,.-[J].,2008,27(2):36-39.[6]　,,.[J].,2009,28(7):22-24.[7]　,,.[J].,2006,23(1):45-48.[8]　,,,.[J].,2009(4):38-41.[9]　,,,.Fe3O4/、[J].,2009,40(7):1184-1187.:2010-11-04··AStudyofRecoveringNickelfromElectrolessNickelPlatingWastewaterbyChemicalPrecipitation,　,　(合肥工业大学机械与汽车工程学院,安徽合肥230009)SHIYin-yan,　XUYu-fu,　HUXian-guo(SchoolofMechanicalandAutomotiveEngineering,HefeiUniversityofTechnology,Hefei230009,China):　采用化学沉淀法从化学镀镍废水中回收镍,通过实验优化了NaOH处理含镍废水的工艺参数,并对沉渣镍盐进行了处理。结果表明,化学沉淀法处理化学镀镍废水的最佳工艺参数为:H2O230mL/L,NaOH15.67g/L,絮凝剂聚丙烯酰胺4g/L。用硫酸处理沉淀物后镍的回收率可达97.25%。:　;;;Abstract:　Nickelwasrecoveredfromelectrolessnickelwastewaterbymeansofchemicalprecipitation.Theprocessingparametersfortreatmentofnickelcontainingwastewaterwithsodiumhydroxidewereoptimizedthroughexperiment,andthenickelcontainingsludgeproducedbychemicalprecipitationprocesswasalsotreated.Theresultsshowthattheoptimalprocessparametersfromsuchtreatmentare:H2O230mL/L,NaOH15.67g/L,PAM4g/L.Therecoveryrateofnickelafterthesedimentistreatedwithsulfuricacidcanreach97.25%.Keywords:　electrolessnickelplating;wastewater;chemicaldeposition;nickelrecycle:X781.1　　　　　:A　　　　　:1000-4742(2011)05-0044-030　Ni-P[1],、、、、,。,。,[2-3]。,Ni2+·44·　Sep.2011　　Electroplating&PollutionControl　　　　　　　　Vol.31No.5　　　　　　。,、、、。、,,,。,,。,NaOH,。1　1.1　,,pH4.30,:Ni2+17367mg/L,Fe2+3.0mg/L,Cu2+15.2mg/L,Zn2+13.7mg/L。:,Ni2+,Ni2+,。1.2　721,pH。NaOH(AR),30%H2O2。1.3　(1),。(2)H2O2,NaOH0.5h,,Ni2+,Ni2+。(3)(PAM)100mL,30mL/LH2O2,15.67g/LNaOHPAM,0.5h,40mL,PAM。(4)100mL,30mL/LH2O2,15.67g/LNaOHPAM,0.5h,120℃2h,。Ni(OH)20.1mol/LH2SO4,,,,。2　2.1　H2O2Ni2+100mLH2O2,1.5gNaOH,0.5h,,1。1　Ni2+　　1:H2O2,Ni2+,H2O2,Ni2+。[Ni3(C6H5O7)2],。H2O2[4],Ni2+,Ni2+。:H2O230mL/L,。,H2O230mL/L。2.2　NaOHpH30mL/LH2O2,,NaOH,pH,,2。2　pH　　2:NaOH3.79g/L,pHNaOH,NaOH·45·20119　　　　　　　　　　　　　　315(181)　　H+,pH;NaOH3.79g/L,pH11.26,NaOH,pH,OH-Ni2+,Ni(OH)2,pH;NaOH15.67g/L,pH,Ni2+,OH-pH。,NaOH15.67g/L,Ni2+。2.3　NaOHNi2+30mL/LH2O2,,NaOH,0.5h,Ni2+,,3。3　Ni2+　　3:Ni2+NaOH,15.67g/L,Ni2+,pH,2。,Ni2+,NaOH15.67g/L。2.4　PAMPAM,,,4。4　PAM　　Ni(OH)2,,40mL3。4:PAM,。PAM,,PAM,“”,[5]。PAM4g/L,。:PAM10g/L,,,PAM4g/L。:PAM10g/L,,。PAM,“”,“”;,[6]。2.5　100mLNi(OH)22.7539g,Ni2+99.97%。,,NiSO4·7H2O7.6297g,Ni2+97.28%。=99.97%×97.28%=97.25%。,,,。3　Ni2+,,。:H2O230mL/L,NaOH15.67g/L,PAM4g/L,0.5h。,Ni2+。,97.25%。:[1]　,.[J].,2001,21(4):30-31.[2]　,.[J].,2003,26(1):54-56.[3]　,.[M].:,2000:5-12.[4]　,,,.[J].,2004,26(1):78-80.[5]　,,.[J].,2007(1):7-11.[6]　.[J].,2009(7):98-99.:2010-12-01·46·　Sep.2011　　Electroplating&PollutionControl　　　　　　　　Vol.31No.5