超声波零价铁降解对硝基苯胺的试验研究

©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(,210093)/(U/Fe0),,,U/Fe0,,,,,U/Fe0Cu2+,Fe/Cu,,Fe/CDegradationofp2nitroanilinebyultrasoundandzero2valentironHuWenyongZhengZhengZhengShourongGuoZhaobing(EnvironmentalSchoolofNanjingUniversity,StateKeyLaboratoryofPollutionControlandResourceReuse,Nanjing210093)AbstractInthispaper,thedegradationofp2nitroanilinewasinvestigatedprimarilyinultrasound,zero2valentiron,ultrasoundandzero2valentironsystems(U/Fe0).Theresultsindicatethatthedegradationofp2nitro2anilinefollowsfirst2orderkineticsmodelunderultrasoundirradiation,onlylowdegradationefficiency,however,canbeobtainedforp2nitroanilineinhigh2concentration.Inultrasoundandzero2valentironsystem,asynergiceffectforp2nitroanilinedegradationisobservedandthedegradationrateofp2nitroanilineisimprovedmarkedlycomparedtosonicationorzero2valentiron.Itisalsoshownthatp2nitroanilineisfirstlyreducedintop2dianilinebyzero2valentiron,andisfurtherdecomposedunderultrasoundirradiation.InthepresenceofCu2+inU/Fe0system,thegenerationofnewFe/Cuprimarybatterymarkedlyenhancesthedegradationrateofp2nitroaniline.Keywordsultrasound;zero2valentiron;deradation;p2nitroaniline:(BG2001040):2003-12-02:(1973),,,,E2mail:[e-mail],,[1],[2],[3],,,,,,[46],,[78],11.1,AR,;CuCl22H2O,AR,;,(,);,AR,1.21DG2200,25kHz,0200W,150mL,1.3,100mL,201©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(HPLC):Agilent21100;:;:380nm;:272nm;:/45/55;:1mL/min;:3mL;:301KHPLC::246nm;:360nm;:/30/70;:1mL/min;:5mL;:303K(GC2MS)::FinnigonMRT;:HP52MS;:553K;:333K,10K/min553K22.1102050mg/L,132W,,,(2),,5h,102050mg/L,8011%5617%2615%,,2(1),:Ct/C0=e-kt(1)2Fig.2Effectofconcentrationonthedegradationofp2nitroanilinebyultrasound1Table1Kineticsmodelsofdegradationofp2nitroanilineindifferentconcentrationbyultrasound(mg/L)10Ct/C0=e-010011tR2=0.986920Ct/C0=e-010026tR2=0.983250Ct/C0=e-010066tR2=0.9946:ct;t;c0;k,=0105,(2):k10k20k50(2),k10k20k50102050mg/L,,,[9,10],,,,;,,5000K,,,OH,[11]132W,92©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(Ct-C0),(Ct-C0)/C02.2U/Fe02.2.1U/Fe050mg/L,U/Fe0132W,3g3125%,012019mm,3%10minpH615,,3(3)3Fig.3Synergiceffectofultrasoundandzero2valentiron,U/Fe0,,90min,U/Fe01118%6317%9715%3(1)(2),,=0105,3:kU/Fe0kU+kFe0(3),kU/Fe0kUkFe0U/Fe0UFe03,2.2.2U/Fe0U/Fe0,,Fe/C2Table2Kineticsmodelsofp2nitroanilinedegradatedinU,Fe0andU/Fe0systemCt=50e-010012tR2=0.9801Ct=50e-010122R2=0.9878U/Fe0Ct=50e-01036tR2=0.9729,,[12]Fe0U/Fe0,5min(4),:4Fig.4Massspectrographofdetectedp2dianilineU/Fe0,(5),,U/Fe0,,U/Fe0,[13,14],,:03©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(6),,,3h,8319%4511%,,2,1,,,HO,HO2,U/Fe06Fig.6Comparasionofdegradationrateofp2nitroanilineandp2dianilinebyultrasound2.2.3(1)[15],,,,Fe/C,,,,,,,,[16][17],;,,[18]Fe0,Fe0,[19](2),Fe2+,,H2O2Fenton,:H2O2+Fe2+Fe3++OH-+OH(7)OH+(8)Fenton,[20],Fe2+Fe3+,pH,Fe(OH)3,,2.3U/Fe050mg/L,pH615;1g,01063mm,(U/Fe0),,30mgCuCl2H2O(U/Fe/Cu),,2U/Fe/CuU/Fe01g0105mm,(U/Fe),(7)U/Fe/Cu,0105mm,CuCl22H2O,,,Fe/Cu,,Cu,(4)(5)13©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(8)U/Fe/CuU/Fe0,,,Cu2+pH,[21]8Fe/CFe/CuFig.8SectionaldrawingofelectrolyticcellsofFe/CandFe/Cu8,U/Fe,,3(1),,(2)U/Fe0,,,,(3)U/Fe0Cu2+,Fe/Cu,,Fe/C[1]11:,19891232253[2]1221,2000,26(3):175177[3],11,2001,19(3):26[4],11,1997,13(6):2830[5]11,2000,26(2):114119[6],,11,1998,6(6):2935[7]TersereM.O.,PhilippeF.B.Oxidationkineticsofnatu2ralorganicmatterbysonolysisandozone1Wat.Res.,1994,28(6):13831391[8]NaffrechouxE.,ChanouxS.,PetrierC.Sonochemicalandphotochemicaloxidationoforganicmatter1UltrasonicsSono2chemistry,2000,7(4):255259[9]HengleinA.Chemicaleffectsofcontinuousandpulsedul2trasoundinaqueoussolutions1UltrasonicsSonochemistry,1995,2(2):S115S121[10]OkunoH.,YimB.,MizukoshiY.Sonolyticdegradationofhazardousorganiccompoundsinaqueoussolu2tion1UltrasonicsSonochemistry,2000,7(4):261264[11],,,11,1997,(7):3538[12],,11,2002,(10):281283[13]TiluannS.Anew42nitrotoluenedegradationpathwayinamycobacteriumstrain1Appl.Environ.Microbiol.,1998,64(2):446452[14]ArwayO.,EvansW.C.Metabolismofquinolandresor2cinolbysoilpseudomonas1J.Biochem.,1965,95:99159918(36)23©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(2)2cm,1cm,ZnO12=2cm2,2ZnO/2121.9352Fig.5Degradationcurvesofphenolwithtwodifferentsamples4CZnO,,2,ZnOZnO1193,ZnOZnO,,,,,ZnO,[1],,,.TiO2.,2003,24(7):553557[2],,..,2002,30(4):5658[3],,.ZnO.,1999,12(2):98100[4],,,.ZnO.,2002,22(3):246249[5],,,.Ag/ZnO.,2003,31(8):6870[6],,.ZnO.,2003,24(2):1