Fenton纳米TiO2U省略氧化法处理高浓度农药废水效果研究徐辉

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Fenton-TiO2/UV,,,,,,(,410000):Fenton-TiO2/UV,pH、TiO2、Fenton(),。,FentonpH=3、Fe2+0.8g/L、H2O20.89g/L、2.0h、Ca(OH)212.5g/L,TiO2/UVpH=6、TiO23.0g/L、2.0h,PAM12.0mg/L,Ca(OH)27.5g/L;,COD、、、61.54%、52.74%、48.76%57.49%,COD65900mg/L25342mg/L,B/C0.280.46。:Fenton;;;TiO2。:X703:A:1006-8759(2018)06-0034-06STUDYONHIGHCONCENTRATIONPESTICIDEWASTEWATERTREATMENTBYFENTONANDNANO-TIO2/UVPHOTOCATALYSISOXIDATIONXUHui,PENGDan-li,ZHENGZhi-li,WANGSi-jin,XIEQi-wen,GUOWen-hui,JIANGZhi-guang(AHunanXianruiEnvironmentalTechnologyCo.,Ltd.,Changsha410000,China)Abstract:HunanHailicomprehensivepesticidewastewaterwaspretreatedbyFentonoxidationandnano-TiO2/UVphotocatalysisoxidation.TheinfluencesofpH,nano-TiO2dosage,Fentondosage(ratio),andsomeauxiliarycatalyticmeasureswereinvestigatedtodeterminetheoptimalprocessparameters.TheresultsshowedthattheoptimumconditionsforFentonoxidationwerepH=3.0,Fe2+dosage=0.8g/L,H2O2dosage=0.89g/L,reactiontime=2.0h,Ca(OH)2dosage=12.5g/L.Theoptimumconditionsfornano-TiO2/UVphotocatalysisoxidationwerepH=6.0,nano-TiO2dosage=3.0g/L,reactiontime=2.0h,PAMdosage=12.0mg/L,Ca(OH)2dosage=7.5g/L.Undertheoptimumconditions,theremovalsofCOD,totalphosphorus,totalnitrogen,ammonianitrogenwere61.54%,52.74%,48.76%and57.49%,respectively.TheCODconcentrationdecreasedfrom65900mg/Lto25342mg/L.TheB/Cratioincreasedfrom0.28to0.46.Keywords:Fentonoxidation,photocatalysisoxidation,pesticidewastewater,nanoTiO2.:2018-08-02EnergyEnvironmentalProtection326201812Vol.32.No.6Dec.,2018,,,,。,,,,,,。,,CO2H2O[1-3]。(、),,(90.7%)(79.6%)[4]。,FentonTiO2/UV。pH、TiO2、Fenton,,,COD、、、,,。11.1:(30%w/w,),()、()、()、()、()、TiO2,,25±5nm,60~80m2/g,。:、、、、、、、、、(1)。1.2,,1:1.3COD:《》();:GB/T11893-1989;:,HJ636-2012;:HJ535-2009;BOD5:HJ505-2009;pH:pHs-25。22.1,pHFenton,,pH,,。2.1.1pHCODFentonpH,Fe2+=0.4g/L、H2O2=1.2%、t=90minpH,pH1、3、5、79,COD,pH。2。11(mg/L)pHCODBOD5TNNH3-NSSTP10~11659001878140603437821140Fenton-TiO2/UV·35·2,pH,COD。pH=3,COD,37%;pH,COD,,Fe2+Fe3+,Fe3+,Fe(OH)3Fe2O3·nH2O,,[5]。FentonpH=3。2.1.2H2O2CODFentonH2O2,pH=3、Fe2+=0.4g/L、t=90minH2O2,H2O20.3%、0.6%、0.8%、1.5%2.4%,COD,H2O2。3。3,Fe2+,H2O2,COD,H2O20.8%,COD39%,H2O2,COD,,H2O2,H2O2,,COD[6]。FentonH2O20.8%。2.1.3Fe2+CODFentonFe2+,pH=3、H2O2=0.8g/L、t=90minFe2+,Fe2+0.2g/L、0.4g/L、0.6g/L、0.8g/L1.2g/L,,COD,Fe2+。4。4,H2O2,Fe2+,COD,Fe2+0.8g/L,COD36%,Fe2+,COD,。,Fen-tonFe2+0.8g/L。2.1.4CODFenton,pH=3、Fe2+=0.8g/L、H2O2=0.8g/L,Fenton,30min、60min、90min、120min180min,COD,。5。2pHCOD3H2O2COD4Fe2+COD5FentonCOD326·36·5,Fe2+、H2O2,,COD,30min,COD15%,120min,COD33%,,COD,。,Fenton120min。2.2TiO2/UV2.2.1pHTiO2/UVFenton,TiO2/UVpH,TiO2=2.0g/L、UV5w、t=90minpH,pH2、4、6、8、1012,COD,pH。6。6,pH,COD,,pH=6,COD,35%;pH=1pH=12,COD。,TiO2,,TiO2/UV[7]。TiO2,TiO2pH=6.25,pH6.25,TiO2,pH6.25,TiO2,,H2O、OH-,[8]。TiO2/UVpH=6。2.2.2TiO2Fenton,TiO2/UVTiO2,pH=6、UV5w、t=120minTiO2,1.0g/L、2.0g/L、3.0g/L、4.0g/L5.0g/LCOD,TiO2。7。7,TiO2,COD,TiO23.0g/L,COD40%,COD37000mg/L22000mg/L,TiO2,COD,TiO25.0g/L,COD,TiO2,[9-10],UV,COD。TiO2/UVTiO23.0g/L。2.2.3TiO2/UVFenton,TiO2/UV,TiO2、pH=6、,,30min、60min、90min、120min180min,COD,。8。8,,COD,30min,COD17%,6pHTiO2/UVCOD7TiO2TiO2-UVCODFenton-TiO2/UV·37·120min,COD38%,COD37000mg/L23000mg/L,,COD。UVFen-tonFe3+Fe2+,Fe3+/Fe2+,H2O2·OH,[11]。、,TiO2/UV120min。2.2.4TiO2TiO2,,,,,TiO2,。PAMTiO2/UVTiO2,,[12]。PAMTiO2,8,TiO2,9。9,pH=6,PAMTiO2/UVTiO2,,TiO280%,PAM,TiO2PAM2.0mg/L~4.0mg/L,,,PAM=12.0mg/L97.5%,PAM,TiO2,TiO2PAM12.0mg/L。2,TiO2,TiO2,COD,,COD30%,,COD38.08%15.6%,,4。TiO2,4。2.3,Fenton/TiO2-UV,Fenton:pH=3、Fe2+=0.8g/L、H2O2=0.8%(0.8g/L)、2.0h、Ca(OH)212.5g/L;FentonTiO2/UV,pH=6、TiO2=3.0g/L、2.0h,PAM=12.0mg/L,Ca(OH)27.5g/L,COD、、,3。3,Fenton-TiO2/UV,COD、、,COD、、62%、53%、49%57%,COD65900mg/L25342mg/L,,B/C0.280.46,,(10)。,。3Fenton-TiO2/UV,,COD、、、9PAMTiO22TiO212345COD/%38.0831.2224.7519.8115.61/%-81.9864.9952.0240.973Fenton/TiO2-UVFenton+TiO2/UV/%COD(/mg/L)659002534261.54(/mg/L)1340633.352.74(/mg/L)4060208048.76(/mg/L)343145.857.49BOD51878111657326·38·62%、53%、49%57%,,。,,,A2/O,,。,FentonTiO2,,,。[1],,.Fenton[J].:,2007,35(3):34-38.[2],,,.[J].,2017,37(5):84-91.[3]ALALMMG,TAWFIKA,OOKAWARES.ComparisonofsolarTiO2,photocatalysisandsolarphoto-Fentonfortreatmentofpesti-cidesindustrywastewater:Operationalconditions,kinetics,andcosts[J].JournalofWaterProcessEngineering,2015,8:55-63[4]AffamAC,ChaudhuriM,KuttySRM,etal.UVFentonandse-quencingbatchreactortreatmentofchlorpyrifos,cypermethrinandchlorothalonilpesticidewastewater[J].InternationalBiodeterioration&Biodegradation,2014,93(93):195-201.[5],,,.Fenton[J].,2015,44(2):127-129.[6]DLUGOSZM,ZMUDZKIP,KWIECIENA,etal.Photocatalyticdegradationofsulfamethoxazoleinaque-oussolutionusingaoatingTiO2-expandedperlitephoto-catalyst[J]JHazardMater,2015,298:146-153.[7],,,.[J].,2013,33(12):31-34.[8].TiO2SBR[D].,2013.[9].TiO2[D].,2016.[10],.FentonTiO2[J].,2012,31(4):429-436.[11],,.TiO2-UV()Fenton[J].,2013,42(3):415-420.[12].TiO2[D].,2016.10Fenton-TiO2/UV·39·

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