电镀络合废水破络合后处理工艺优化林琳

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(,300072),、,,。、、[1],。、、,EDTA-Na、(Na3C6H5O7)、、,Cu2+、Ni2+[2-3]。,。,,、、、[4]。。,-,,pH6~8,,pH,pH6~8,-,,,。11.1,、61L。:(pH6~8),pH,、、:pH6~8,,。,pH6~8,。:0.34mL/L,40min,pH10.5,250mg/L。,,。:;;:X703.1;X781.1:A:%1009-2455(2011)06-0033-04OptimizationoftechnologyfortreatmentofcomplexelectroplatingwastewaterafterdecomplexationLINLin(SchoolofEnvironmentalScienceandTechnology,TianjinUniversity,Tianjin300072,China)Abstract:InordertofindaproperoxidantwhichcangetgooddecomplexationeffectwhentreatingcomplexwastewaterwithapHof6-8,andtooptimizethetechnologyforhighconcentrationcomplexelectro-platingwastewatertreatment,theprocessconditionofcomplexwastewatertreatmentwasstudiedthroughthetest.Theresultsshowedthat,whenthepHvalueofthecomplexwastewaterwasintherangeof6-8,theoxidationdecomplexationperformanceofH2O2wasbetter.Theoptimalprocessconditionwasasfollows:thedosageofH2O2andNa2Swere0.34mL/Land250mg/Lrespectively,thedecomplexationtimewas40min,thepHvaluewas10.5.TheaboveparametershavedirectivesignificancetotheprojectsusingH2O2asdecomplexationagent.Keywords:electroplatingwastewater;complex;H2O2decomplexation:2011-10-17;:2011-10-27INDUSTRIALWATER&WASTEWATERVol.42No.6Dec.,2011·33·INDUSTRIALWATER&WASTEWATERVol.42No.6Dec.,20111Fig.1ProcessflowpHPAM/PAC1Tab.1RawwaterqualitypHρ(CODCr)/(mg·L-1)ρ()/(mg·L-1)ρ()/(mg·L-1)ρ(Cr6+)/(mg·L-1)7.4256110.79.8ρ(CN-)/(mg·L-1)ρ()/(mg·L-1)ρ()/(mg·L-1)ρ(PO43-)/(mg·L-1)6.6189143Fig.3Influenceofoxidantdosageonresidualnickelionconcentrationρ()/(mg·L-1)0.50.40.30.20.102Fig.2Influenceofoxidantdosageonresidualcopperionconcentration1234/(mL·L-1)ρ()/(mg·L-1)1.00.80.60.40.201234/(mL·L-1)PAC、PAM,,。1。1.2,1。GB21900—2008《》2,ρ()<0.5mg/L,ρ()<0.5mg/L。1.3(1)。2,pH,30min,pH10.0,20min,200mg/L,,300r/minPAC,30s,100r/min,PAM,10min,50r/min,10min。30min。、、3。(2)。、、pH、4,pH,(C),(D),pH(A),20min,(B),,(1)。、、3。,,3,。,3,43,A、B、C、D,。1.4、[5]。22.11.0L1.0L,:(10%)1.0、1.5、2.0、2.5、3.0、3.5mL;(10%)0.24、0.36、0.48、0.60、0.72、0.84mL。pH7.4。2、3。2、3,,,0.23~0.68mL/L,,0.68~0.81mL/L,。,,,。,。2.22.2.1pH10、300mg/L、·34·:4、Fig.4InfluenceofH2O2dosageonresidualcopperionandnickelionconcentration0.240.290.340.390.430.49/(mL·L-1)ρB/(mg·L-1)0.60.50.40.30.20.15、Fig.5Influenceofoxidationdecomplexationtimeonresidualcopperionandnickelionconcentration102030405060/minρB/(mg·L-1)0.60.50.40.30.20.16、Fig.6InfluenceofNa2Sdosageonresidualcopperionandnickelionconcentration50100150200250300/(mg·L-1)ρB/(mg·L-1)5432107pH、Fig.7InfluenceofpHvalueonresidualcopperionandnickelionconcentration9.09.510.010.511.011.5pHρB/(mg·L-1)1.81.51.20.90.60.3030min,、,4。4,,、,0.34mL/L,、0.39、0.38mg/L,。0.34mL/L。2.2.2pH10、300mg/L、0.34mL/L,、,5。5,,,40min。,,、,40min。2.2.3pH10、0.34mL/L、40min,、,6。6,,,250mg/L,0.45mg/L,。50~300mg/L,。250mg/L。2.2.4pH0.34mL/L、40min、250mg/L,pH、,7。7,pH,,。pH,,pH10.5,0.31mg/L,。pH10.5。2.3,pH(A)、(B)、(C)、(D)4,43。、2,3。3,·35·INDUSTRIALWATER&WASTEWATERVol.42No.6Dec.,20112-Tab.2Factor-leveloforthogonaltestAB/(mg·L-1)C/(mL·L-1)D/min19.51500.3020210.02000.3230310.52500.34403Tab.3ResultsoforthogonaltestABCDρ()/(mg·L-1)ρ()/(mg·L-1)19.51500.30200.720.7529.52000.32300.450.5039.52500.34400.230.38410.01500.32400.640.52510.02000.34200.360.33610.02500.30300.130.30710.51500.30400.680.39810.52000.32200.310.19910.52500.34300.120.10109.51500.34200.680.58119.52000.30300.400.53129.52500.32400.200.431310.01500.34300.690.481410.02000.30400.300.351510.02500.32200.280.291610.51500.32300.550.391710.52000.34400.230.161810.52500.30200.270.144()Tab.4Rangeanalysisresultsoforthogonaltest(copper)ABCDk10.4470.6600.4170.437k20.4000.3420.4050.390k30.3600.2050.3850.380R0.0870.4550.0320.057A3B3C3D3B>A>D>C5()Tab.5Rangeanalysisresultsoforthogonaltest(nickel)ABCDk10.5280.5180.4100.380k20.3780.3430.3870.383k30.2280.2730.3380.372R0.3000.2450.0720.011A3B3C3D3A>B>C>D、,、4,,、。2.44、5。4,pH、、。pH,、、。、A3B3C3D3,:0.34mL/L,40min,pH10.5,250mg/L。3(1)pH6~8,。(2):B>A>D>C。B。:A>B>C>D。A。:pH6~8,0.34mL/L,40min,pH10.5,250mg/L。。:[1],.[M].:,2000.[2],,.[J].(),2005,24(1):107-111.[3]KurniawanTA,ChanGYS,LoWH,etal.Physico-chemicaltreatmenttechniquesforwastewaterladenwithheavymetals[J].ChemicalEngineeringJournal,2006,118(1/2):83-98.[4].[J].,2011,38(4):173-174.[5].()[M].:,2002.:(1985-),,,,,()linlin851215@126.com。·36·

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