粉煤灰H2O2催化氧化水中对氨基苯酚的试验研究罗道成

612Vo.l6,No.12200512TechniquesandEquipmentforEnvironmentalPollutionControlDec.2005-H2O2罗道成　刘俊峰(,411201)　　,H2O2(PAP),PAP。,30℃,pH=1.5,H2O2PAP0.50mol/L0.10mol/L,100min,6.0%,1000r/min,,H2O2PAP,PAP81%。PAP。　　　　　X703　　　A　　　1008-9241(2005)12-0061-04Expermientalstudyofflyash-H2O2catalyticoxidationofp-aminophenolinwaterLuoDaocheng　LiuJunfeng(CollegeofChemistryandChemicalEngineering,HunanUniversityofScienceandTechnology,Xiangtan411201)Abstract　Flyashfrompowerplantswasusedasheterogeneouscatalystintheprocessofoxidationofp-a-minophenol(PAP)byH2O2.TheeffectsofvariousparametersontheremovalrateofPAPwereinvestigated.Theresultsshowedthatflyashhasasatisfactorycatalyticactivation,forefficientlycatalyzingH2O2fortheoxida-tionofPAP.ThehighestPAPremovalrateof81%wasachievedundertheconditions:temperature30℃,pH1.5,0.50mol/LH2O2,0.10mol/LPAP,100minreactiontime,6.0%flyashdosage,and1000r/minagita-tingspeed.ThemethodcouldbeusedtopretreattheindustrialwastewatercontainingPAP.Keywords　flyash;heterogeneouscatalyticoxidation;hydrogenperoxide;p-aminophenol:2004-05-11;:2004-06-20:(1967～),,,、,40。E-mail:[e-mail]　　、、、、、,,,。,,。,600t,SiO2、Al2O3、Fe2O3、MgOCaO,、、、、。,、、、[1]。[2]、、、[3]、[4],、、,[5,6],、[7]。[8]。,,H2O2,。、、。1　1.1　(XFA)、(ZFA)(JFA)。1、2。1.2　(1)。(PAP);H2O2,30%,;HCl,2.0mol/L;;。(2)。722;CS-501SP;pHS-3C;78-1。61　()Table1　Chemicalcompositionofflyash(%)SiO2Al2O3Fe2O3CaOMgONa2OK2OTiO2CXFA58.6119.7010.112.531.440.572.050.892.19ZFA51.5820.6911.952.111.480.482.611.556.30JFA57.7621.329.042.091.870.681.352.142.622　Table2　Granularitydistributionofflyash(μm)(μm)75%(μm)25%(μm)(m2/g)XFA16.2023.58≤27.72≤9.790.251ZFA13.9121.02≤25.65≤6.810.324JFA18.4521.83≤29.89≤11.500.2291.3　1000mL,250mLCA0,H2O2,2.0mol/LHCl,pHS-3CpH=1.5,100min,,,CAe,。1.4　,630nm;H2O2。:CA0-CAeCA0×100%,CA0;CAe。2　2.1　0.10mol/L,H2O20.50mol/L,pH=1.5,30℃,100min,6.0%(),1000r/min,XFA、ZFA、JFA,3。3,,3XFA、ZFA、JFA,,ZFAXFA、JFA。ZFA。3XFA、ZFA、JFA,。3　Table3　Effectoftypesofflyashonremovalrateofp-aminophenol(%)XFA79.5ZFA81.7JFA78.62.2　0.10mol/L,H2O20.50mol/L,pH=1.5,30℃,100min,1000r/min,ZFA,1。1,,,6.0%,。6.0%,,H2O2,,,。,ZFA6.0%。1　Fig.1　Effectofflyashdosageonremovalrateofp-aminophenol2.3　H2O20.10mol/L,6212:-H2O2pH=1.5,30℃,100min,ZFA6.0%,1000r/min,H2O2,4。4,H2O20,,,,,10%,H2O2,,H2O20.50mol/L,。H2O20.50mol/L,H2O2,。H2O20.50mol/L。4　H2O2Table4　EffectofconcentrationofH2O2insolutiononremovalrateofp-aminophenolH2O2(mol/L)(%)07.80.1032.60.2048.20.3062.50.4073.10.5081.80.6083.02.4　H2O20.50mol/L,pH=1.5,30℃,100min,ZFA6.0%,1000r/min,,5。5,0～0.10mol/L,,,,0.10mol/L,。0.10mol/L,,,。0.10mol/L。2.5　pHH2O20.50mol/L,0.10mol/L,30℃,5　Table5　Effectofconcentrationofp-aminophenolinsolutiononremovalrateofp-aminophenol(mol/L)(%)0.0286.30.0485.10.0684.00.0882.80.1081.70.1271.5100min,ZFA6.0%,1000r/min,pH,2。2,pH1.0～2.0,,pH1.5,;pH2.0,。,Fe2+H2O2Fenton,Fe2+,H2O22,,[9],,,,CO2NH3,。,,Fe2+。pH1.5。2　pHFig.2　EffectofsolutionpHonremovalrateofp-aminophenol2.6　H2O20.50mol/L,0.10mol/L,pH1.5,100min,ZFA6366.0%,1000r/min,。,20℃,78.9%,30℃,81.7%,40℃,82.7%,50℃,83.4%,60℃,76.8%,,H2O2H2O2,,。30℃。2.7　H2O20.50mol/L,0.10mol/L,pH1.5,30℃,ZFA6.0%,1000r/min,,6。6,,,100min,。100min,,。100min。6　Table6　Effectofreactionarytimeonremovalrateofp-aminophenol(min)(%)2038.74054.56066.48075.810082.112083.32.8　H2O20.50mol/L,0.10mol/L,pH1.5,30℃,100min,ZFA6.0%,。500～1500r/min,,800r/min,。,,,[8],,。1000r/min。2.9　,,2.0mol/LNaOH2～3,2～3,30℃,1、2、3。,,20%,,。,H2O2,。3　　(1)H2O2。30℃,pH=1.5,H2O20.50mol/L0.10mol/L,100min,6.0%,1000r/min,H2O2,81%。(2),。(3)H2O2,,,,,,。[1],,..,2002,30(6):8～10[2],,..,2000,25(6):660～663[3]..,2002,20(1):51～59[4]..,2000,15(3):66～70[5],,,.--.,2002,15(2):23～25[6]..,1998,(4):34～36[7]..,1998,(1):43～45[8],,,.-NaClOCN-.,2003,28(6):646～649[9].Fenton.,2002,24(5):282～28464