多相光催化氧化法处理焦化废水的研究彭贤玉

　　:2004-07-20:(1970-),,,.191()Vol.19No.120053JournalofNanhuaUniversity(ScienceandTechnology)Mar.2005:1673-0062(2005)01-0064-05多相光催化氧化法处理焦化废水的研究彭贤玉1,2,董君英3(1.,410082;2.,421001;3.,410008)　:以TiO2为催化剂,H2O2为氧化剂,在紫外光照射下采用多相光催化氧化法对焦化废水进行处理,对COD去除率的各种影响因素进行了研究探讨,从而得出其较佳工艺条件.结果表明该法可使焦化厂二沉池废水COD从348.3mg/L降至52.1mg/L,COD的去除率可达85.0%以上.:焦化废水;二氧化钛;过氧化氢;多相光催化氧化:X784　　　:BCokingEffluentisDisposedbytheHeterogeneousPhotoCatalyticOxidationMethodPENGXian-yu1,2,DONGJun-ying3(1.DeptofEnvironmentalScienceandEngineering,HunanUniversity,Changsha,Hunan410082,China;2.HengyangRailwayEngineeringSchool,Hengyang,Hunan421001,China;3.ChangshaUniversityOfScienceTechnology,Changsha,Hunan410008,China)Abstract:InthistextTiO2asthecatalyst,andH2O2theoxidant,theheterogeneousmerecatal-ysisisadoptedtooxidizethelawtodealwiththecokingwastewaterunderthecircumstancesthattheultravioletrayshines.Inordertoobtainitsbestprocessconditions,aresearchwascon-ductedonvariousfactorsinfluencingremovalefficiencyofCOD.TheresultindicatesthislawcanmakeCokingandChemistryPlanttwosinkpoolwastewaterCODdrop,from348.3mg/Lto52.1mg/Landtheremovalrateupto85.0%.Keywords:cokingeffluent;titaniumdioxide;peroxid;heterogeneousphotocatalyticoxidation0　、,、、、、、,,、、,,,.、,,DOI:10.19431/j.cnki.1673-0062.2005.01.016.,.,,.,,[1].1　1.1　500W、pHS-25、GDS-3B、AB104-N、85-2、UV-754;、30%H2O2、Na-ClO、(NH4)2S2O8、FeSO4·(NH4)2SO4·6H2O、Fe-SO4·6H2O..①———,CODcr348.3mg/L,pH6.2,29.5mg/L.②———,CODcr1806.4mg/L,pH8.3,65.5mg/L.1.2　,,,,500mL.TiO2,400mL,30%H2O2,pH,(1),500W.,,,COD.2　2.1　　　[2]:、、、、pH、、.,,500W,55mm,70mm,pH、、、、.1),-.,,:O2、H2O2、S2O2-8、IO-4、Fe2O3、ClO-[3].,.TiO2150mg/L,500mg/L,45min,(1),.1　2　3　4　51　Fig.1　Experimentalinstallation1　Table1　InfluenceofvariousoxidantCOD/(mg·L-1)/%130%H2O2131.862.162NaClO248.528.653(NH4)2S2O8198.742.95　　1,H2O2,COD,H2O2,H2O2.2)pHpH,(1),TiO2150mg/L,30%H2O2500mg/L,45min,NaOHpH65191　　　　　　　　　　　　:,2:2,CODpH,pH=3.0COD.2　pHFig.2　InfluenceofpHofwatersample3　Fig.3　Influenceofquantityofoxidant3)H2O2:H2O2+e※OH-+·OHH2O2O-O·OH,H2O2.(1),TiO2150mg/L,45min,30%H2O2,pH3.0,3.3,H2O2,H2O2.500mg/L.4)TiO2TiO2387nm,500W,366nm[4].(1),TiO2150mg/L,30%H2O2500mg/L,pH3.0,4.4,COD,,COD,90min.,,-.90min.4　Fig.4　Influenceofilluminationtime5　Fig.5　InfluenceofquantityofTiO25),Mmin、、、[5].(1),30%H2O2500mg/L,90min,pH3.0.5.5,,,COD.200mg/L.6)[6～7]66()　　　　　　　　　　　　20053.,,(rs)(Cso),,:rs∝ks·cs1+ks·cso(2),,,30%H2O2500mg/L,TiO2200mg/L,90min,pH3.0,2.2　Table2　InfluenceofwatersampleconcentrationondisposalpurposeCOD/(mg·L-1)COD/(mg·L-1)COD/%/%/%2090.3211.287.686.389.915120.4314.887.783.494.510180.64121.932.575.753.25361.28290.719.559.16.111806.41909.5-5.713.20.2　　2,,COD,COD1806.4.500W,366nm,366nm.366nm2,COD,COD,..2.2　1),30%H2O2500mg/L,TiO2200mg/L,90min,pH3.0,,.6.6,1.5h,1.5h63.4NTU.2.5h,,TiO2,TiO2.,TiO2.2)(3).(1),30%H2O2,500mg/L,90min,TiO2200mg/L,FeSO4·7H2O125mg/L,[Fe+]:[H2O2]=1:10,UV/Fenton[11]pH,pH3.0.:250mg/L,pH7.0,120r/min1min,60r/min5min,30min,COD.6　Fig.6　ThesedimentationcurveofTiO23,,.TiO2,H2O2,67191　　　　　　　　　　　　:HO·.UV/H2O2、UV/Fenton,H2O2·OH.,H2O2[2],H2O2Fe2+H2O2.UV/FentonUV/H2O2.,,COD.3　Table3　InfluenceofvariousprocessingCOD/(mg·L-1)/%1UV/H2O2194.744.12UV/H2O2+170.451.13UV/TiO2100.471.24UV/TiO2/H2O252.185.05UV/Fenton120.665.46UV/Fenton+108.868.83　1),CODcr348.3mg/L,pH6.2,:30%H2O2500mg/L,200mg/L,90min,pH3.0.COD348.3mg/L52.1mg/L,COD85.0%,,,.2),UV/H2O2、UV/TiO2、UV/FentonUV/TiO2/H2O2,UV/TiO2/H2O2.:[1]　,,,.[J].,1997,17(6):481～484.[2].[M].:,2003.[3],,.[M].:,2002.[4],.[M].:,2001.[5],.[M].:,2003.[6],.TiO2-UV-O2[J]..2002,21(2):63～64.[7],,　,.TiO2、[J].,2001(2):195～199.68()　　　　　　　　　　　　20053