4氯苯酚在水溶液中的光化学反应

:,29,3(29477283)423()(,100085),42(42CP),.Fe2+Fe3+Al3+,Fe2+Fe3+;,42CP(FA),42CP,.Fe2+Fe3+Al3+,42CP,Fe2+Fe3+.42;(1O2);(ROO,HO);(FA);Fe2+;Fe3+;Al3+;.,[1].[13].,.,,.,(advancedchemicaloxidationprocesses,AOP).C.P.Huang[4],4AOP.,,.H2O2,[2,4]..,(FA)Fe2+Fe3+Al3+42(42CP).1111(FFA),.CH3OH.42(42CP).CH2Cl2FeSO47H2OFe2(SO4)3xH2O(Fe22%)Al2(SO4)318H2O.FA,,[5].112PHILIPS,125W,300nm.113(pH=515):20ppm42CP;:20ppm42CP+1ppmFe2+;:20ppm42CP+1ppmFe3+;:20ppm42CP+1ppmAl3+;:20ppm42CP+10ppmFA;17319977ACTASCIENTIAECIRCUMSTANTIAEVol.17,No.3July,1997:20ppm42CP+10ppmFA+1ppmFe2+;:20ppm42CP+10ppmFA+1ppmFe3+;:20ppm42CP+10ppmFA+1ppmAl3+.,(FFA),20ppm;,(CUM),40ppm.114(1O2)42CP[5].,FFA42CP2min6min,42CP.115[5].2,.[6,7].,Fe2+Fe3+Al3+;FA,,FA.Fe2+Fe3+Al3+FA[5];Fe3+,,Fe2+Al3+,42CP,Fe2+Al3+42CP.,42CPFe2+(Fe3+Al3+)FA,.21142CP142CP.1,42CPFig.1Therelsationshipbetweenthe42CPconcentrationandtimeinthereactionsystemswithorwithoutsimulatedsunlight1:(1),42CP,Fe2+Fe3+Al3+.(2),FA,42CP..Fe2+Fe3+Al3+,42CP.(3),42CP,Fe2+Fe3+Al3+,42CP.(4),FA42CP3133:42()..Fe2+Fe3+Al3+,42CP.,Fe2+(Fe3+Al3+)FA42CP,4h,.42CP.212(1O2)(FFA)1O2[5].2FFA,,1O2.2,FFAFig.2TherelationshipbetweentheresidualrateofFAandtimeinthereactionsystemswithorwithoutlight2:(1),42CPFFA,,Fe2+Fe3+Al3+.(2),FA42CP1O2.Fe2+Fe3+Al3+,1O2.(3),,42CPFFA,1O2.Fe2+Fe3+Al3+,Fe2+Fe3+,.42CP.(4),FA+42CP1O2,42CP1O2,FA[5]42CP1O2.,.Fe2+Fe3+,.42CP.213(CUM)[5].3CUM,,.3:(1),42CPCUM,,Fe2+Fe3+Al3+,.(2),FA42CP.Fe2+Fe3+Al3+,.(3),,42CPCUM,.Fe2+Fe3+Al3+,Fe2+Fe3+,.42CP.(4),FA+42413173,CUMFig.3TherelationshipbetweentheresidualrateofCUNandtimeinthereactionsystemswithorwithoutlightCPROOHO,42CP,FA[5]42CPROOHO..,.Fe2+Fe3+,.42CP.,42CPHO,HO.AnsonUV,:HO[8].Willie()QSAR,:UVHO1O2[9].C.D.Dong22CPTiO2,22CP22CPHO[10].Jean2Christophe22CP32CPTiO2,HOOH-,O-2H+.O22UV2TiO2,:O-2O-3O-O2-2.O-2H+H2O2,HO[11,12].,1O2HO.,42CP1O2HO.311,42CP,.21,42CP,.Fe2+Fe3+Al3+,Fe2+Fe3+.31,42CPFA,42CP,.Fe2+Fe3+Al3+,42CP5133:42(),Fe2+Fe3+.1..,1994,22(5):5052EwaLipczynska2Kochanyetal.Flashphotolysis/HPLCapplications.21Directphotolysisvshydrogenperoxidemediatedpho2todegradationof42chlorophenolasstudiedbyaflashphotolysis/PHLCtechnique.ES&T.1992,26(2):2592623Jean2ChristopheDOliveiraetal.Photodegradationof22and32chlorophenolinTiO2aqueoussupensions.ES&T,1990,24(7):9909964HuangCPetal.Advancedchemicaloxidation:itspresentroleandpotentialfutureinhazardouswastetreatment.WasteMan2agement,1993,13:3613775..[].19976..,1993,12(5):3307..:,1987:2998AnsonSWLietal.SpectroscopicstudiesofcutaneousphotosensitizingagentsÝ.Photochemistryandphotobiology.1989,49(1):25329WillieJGMPeijnenburgetal.Developmentofastructure2reactivityrelationshipforthephotohydrolysisofsubstitutedaromat2ichalides.ES&T,1992,26(11):2116212110DongCDetal.AcomparativestudyonthedirectphotolysisandTiO22mediatedphotodegradatinof2chlorophenolinaqueoussolutions.photocatalyticpurificationandtreatmentofwaterandair.1993n,ElsevierSciencePublishersB.V.,70170611Al2EkabiHetal.Kineticstudiesinheterogeneousphotocatalysis.2.TiO22Mediateddegradationof42chlorophenolaloneandinathree2componentmixtureof42chlorophenol,2,42dichlorophenol,and2,4,52trichlorophenolinair2equilibratedaqueousmedi2a.Langmuir,1989,5:250225512OkamotoKetal.HeterogeneousphotocatalyticdecompositionofphenoloverTiO2powder.BullChemSocJpn,1985,58:201520221995210213PHOTOREACTIONOF42CHLOROPHENOLINAQUATICSOLU2TIONS()GENERATIONOFSINGLEOXYGENANDFREERADI2CALYuZhiyong,WangWenhua,PengAn,WangShuqin,XuWeibing(ResearchCenterforEco2EnvironmentalSciences,ChineseAcademyofSciences,Beijing100085)ABSTRACTExposedtosimulatedsunlight,theconcentrationof42CPreducedrapidly.Duringthisprocess,alargeamountofsingleoxygen(1O2)andfreeradicals(ROO,HO)weregenerat2ed.Metalions,suchasFe2+,Fe3+,andAl3+,especiallyFe2+andFe2+couldacceleratethisprocess.Undersimulatedsunlight,thefulvicacid(FA)addedinto42CPsystemcouldrestrainthereductionofthe42CPconcentration,indicatingthattherewasaninteractionbetweenFAand42CP.Aftermetalions(Fe2+,Fe3+,Al3+)wereadded,theycouldacceleratethereductionof42CPconcentration.Keywords42chlorophenol,singleoxygen,freeradicals,fulvicacid,Fe2+,Fe3+,Al3+photore2action.61317