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:2010-07-15:(1965-),,,。GuangxiSciences2010,17(4):353～357UV/TiO2SFBlueDegradationKineticsofDyeSFBlueinUV/TiO2Sus-pensionSystem蔡邦宏,曾志颖,吴泽彪,谢雅佳,黄嘉敏CAIBang-hong,ZENGZhi-ying,WUZe-biao,XIEYa-jia,HUANGJia-min(, 514015)(SchoolofChemistryandEnvironment,JiayingUniversity,Meizhou,Guangdong,514015,China):TiO2,SFBlue,、TiO2、、pH、UV/TiO2。,UV/TiO2SFBlue,,,50.1kJ·mol-1,4.47×105L·mg-1·min-1;,14.8kJ·mol-1,1.67min-1。UV/TiO2、TiO2、、pH、,TiO21.2g·L-1,pH≤3,TiO2SFBlue。: TiO2 :O643,X703 :A :1005-9164(2010)04-0353-05Abstract:Thedegradationefficiency,effectfactors(suchasreactiontime,TiO2dosage,dyeconcentration,initialpHvalueandtemperature)andkineticsofdyeSFBlueinUV/TiO2sus-pensionsystemareinvestigated.TheresultsshowthatUV/TiO2hasahighactivityondegra-dationofdyeSFBlueinsolution,andthephotodecompositionreactionofthedyeisconcurrentbesidesthephotocatalyticdegradation.Theresultsalsoshowthatthephotocatalyticdegrada-tionofthedyeinUV/TiO2systemisasecond-orderreactionapparently,withactivationenergy50.1kJ·mol-1andpre-exponentialfactor4.47×105L·mg-1·min-1,whilethephotode-compositionofthedyeinUVsystemisafirst-orderreactionapparently,withactivationenergy14.8kJ·mol-1andpre-exponentialfactor1.67min-1.Inaddition,theadsorptionofthedyeonTiO2surfacebecomesverystrongwhentheinitialpHvalueofdyesolutionbeingandbelow3.Keywords:printinganddyeingwastewater,degradation,titania,photocatalysis,activationener-gy ,,。,3×106～4×106m3/d,1/3[1]。、、COD、、、,[2,3]。[4～7]。,。SFBlue,TiO2。353广西科学 2010年11月 第17卷第4期DOI:10.13656/j.cnki.gxkx.2010.04.0231 1.1 :XPA(),18W(254nm,),722S(),FA2004(),HK-2A(),pHS-2C(),800B()。 :TiO2(),SFBlueExF(,)。1.2 ,,,,。(160ml)SFBlue,TiO2,,,18W,。1.3 。,SFBlue(340～780nm),610nm。,SFBlue,-,,。 3000r/min10min,,TiO2。2 2.1 1SFBlueUV/TiO2,UV,TiO2。30℃,50mg·L-1,TiO21.2g·L-1。1,UV/TiO2,,,30min,[8]30min;UV,,;TiO2。 c-t(2):UV,,,R20.995;UV/TiO2,,R20.930。,,SFBlue,()。,。Langmuir-Hinshel-wood[9],。 1 Fig.1 Degradationratioofthedyevs.reactiontimeindifferentsystems -◇-:UV/TiO2,-△-:UV,-□-:TiO2。 2 lnc1/c Fig.2 Plotoflncor1/cagainsttindifferentsystems -□-:lnc(UV),y=-0.00458x+3.928,R2=0.998;-○-:1/c(UV/TiO2),y=0.00117x+0.0149,R2=0.990。2.2 TiO2 3,,TiO2,,,,TiO2(1.2g·L-1),。,TiO2354GuangxiSciences,Vol.17No.4,November2010,,,TiO2,,TiO2TiO2,。4,,TiO20.3～1.8g·L-1,100min75%～85%,,TiO2。 3 TiO2(50mg·L-1) Fig.3 Relationbetweendegradationratioandillumina-tiontimeatdifferentconcentrationofTiO2 -◇-:0g/L,-□-:0.3g/L,-△-:0.6g/L,-×-:0.9g/L,--:1.2g/L,-○-:1.5g/L,-+-:1.8g/L。 4 100minTiO2 Fig.4 Relationbetweendegradationratioandthecon-centrationofTiO2at100minillumination2.3 5,TiO21.2g·L-1,,,。,110mg·L-180min60%(6),UV/TiO2SFBlue。,TiO2,,,,,,,。,,TiO2、,,,,,。 5 Fig.5 Relationbetweendegradationratioandtheinitialconcentrationofdye -◇-:10mg/L,-□-:30mg/L,-△-:50mg/L,--:70mg/L,--:90mg/L,-○-:110mg/L。 6 80min Fig.6 Relationbetweendegradationratioandtheinitialconcentrationofdyeat80minillumination ,,,,(c-t),,,·OH,,·OH,[4]。,,TiO2,,,。2.4 pH 30℃,50mg·L-1,TiO21.2g·L-1,HClNaOHpH(7),pH4～12,pH6,[10],pH4～10,pH12。,TiO2355广西科学 2010年11月 第17卷第4期,pH6(DegussaP25pHzpc6.25),pHTiO2,,TiO2,。pHTiO2,TiO2,,,,,。pHTiO2,TiO2,-OH、H2O·OH,。pHTiO2,,TiO2,O2,,,H+,TiO2,·OH,[11]。 7 pH Fig.7 Relationbetweendegradationratioandillumina-tiontimeatdifferentinitialpHofdyesolution -◇-:pH=4,-□-:pH=6,-△-:pH=8,--:pH=10,--:pH=12。 ,80min,pH。、,,pH,pH,pH4～10,pH[11]。 ,pH≤3,TiO2SFBlue,TiO2,。2.5 50mg·L-1,TiO21.2g·L-1(8),,,,,。,TiO2,O2,。 8 UV/TiO2(a)UV(b) Fig.8 PlotoftimedependentofdyedegradationratioatdifferenttemperatureinUV/TiO2(a)andUV(b)system -◇-:30℃,-□-:40℃,-△-:50℃,--:60℃,--:70℃,-○-:80℃。 ,UV/TiO2,UV,1/c-t(9)lnc-t(10),R20.930,R20.995。1。9 UV/TiO21/c-t Fig.9 Plotof1/cagainsttatdifferenttemperatureinUV/TiO2system -◇-:30℃,-□-:40℃,-△-:50℃,--:60℃,--:70℃,-○-:80℃。356GuangxiSciences,Vol.17No.4,November201010 UVlnc-t Fig.10 PlotoflncagainsttatdifferenttemperatureinUVsystem -◇-:30℃,-□-:40℃,-△-:50℃,--:60℃,--:70℃,-○-:80℃。1 UV/TiO2,UVTable1 PhotodegradationrateconstantsofthedyeatdifferenttemperatureinUV/TiO2andUVsystemsT(K)kUV/TiO2(L·mg-1·min-1)UV(min-1)303.150.001170.00458313.150.002110.00577323.150.003080.00677333.150.005520.00842343.150.009810.00973353.150.021580.01017 lnk-1/T11,UVSFBlueEa=1779R=14.8kJ·mol-1,A=e0.513=1.67min-1;UV/TiO2SFBlueEa=6022R=50.1kJ·mol-1,A=e13.01=4.47×105L·mg-1·min-1。,UVTiO2,,,,,,,。,,,。11 UVUV/TiO2lnk-1/TFig.11 Plotoflnkagainst1/TinUVandUV/TiO2systems -□-:UV,y=-1779x+0.513;-△-:UV/TiO2,y=-6022x+13.01。3 UV/TiO2SFBlue。SFBlue,,50.1kJ·mol-1,4.47×105L·mg-1·min-1;,14.8kJ·mol-1,1.67min-1。 ,TiO20.3～1.8g·L-1,,1.2g·L-1,。,,,,TiO2,。pH6,,pH4～10,pH12,80min。pH≤3,TiO2SFBlue。:[1] ,,.[J].,2007,27(9):11-15.[2] .[J].,2007,28(1):116-119.[3] .[J].,2007(17):41-44.[4] ,,.TiO2[J].,2007,27(1):32-36.[5] ,,,.TiO2[J].,2008,27(5):991-995.[6] ,,,.TiO2/SiO2B[J].,2006,27(11):2154-2158.[7] ,.[J].,2006,26(6):1-5.[8] ,,.TiO2[J].,1998,21(3):25-27.[9] ,,.[J].,2006,57(5):1159-1165.[10] ,,,.[J].,2003,21(3):76-78.[11] .[J].,2005,34(8):497-499.(:) 357广西科学 2010年11月 第17卷第4期