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20041SHUILIXUEBAO10559-9350(2004)01-0122-071,1,21.210024;2.210029MonodMonte-Carlo1063.69597.89521.809530.395X131APAHs1CO22Parket.Al3Mulderet.al43,/(6--PAHs)2002-10-08(59909003)(1964-)12220041SHUILIXUEBAO115Mossna17m1.5m15cmghiNFDA7123-cd15cm21995271dPAHs1225%353pH6.57.5415205N1025mg/kgP510mg/kgPAHs123Monod)1(θ−(1)SR=KdCP(2)SIt=KISR=KIKdCP(3)(4)(5)CP|t=0=C|t=0=C00ra(6)SR|t=0=KdC0=S00ra(7)12320041SHUILIXUEBAO1(1-)SRt+(1-)SIt+CPt=1r2rDPr2CPr(1)(2)(3)CPrr=0=0t0(4)dCdt=-KCKS+C-(1-)ASDPCPrr=at0(5)(6)(7)1SR(mg/kg);SI(mg/kg);Cp(mg/L)kgLDPcm2/h;t(h);rcm2/KdLkg3KI(h-1)415(1)Monod:CmgLKS12420041SHUILIXUEBAO1mgL;KmgL-1h-1;(1-);Ascm2/kg;a(cm)672C0(mg/L);S0mg/kg3/KdDP68433d12189p(x)=12exp-(x-)222(xR)()(8)p(x)=12xexp-(lnx-)222(x0)()(9)1/(kgL-1)2.60.039=2.6=0.0390.10.008.=0.1=0.0080.40.021.=0.4=0.021a/mm0.010.003=0.01=0.003Kd/(Lkg-1)58300950=10.9732=0.01629K()/(mgL-1h-1)0.0230.0022=0.023=0.0022K()/(mgL-1h-1)0.00280.00043=0.0028=0.00043KS/(mgL-1)0.000050.000001=5.0-5=1.0-6KI/h-19.0-62.5-7=9.0-6=2.5-7DP/(cm2h-1)0.0180.00035=0.018=0.00035S0/(mgkg-1)20.00.94=2.9946=0.04697412ST/S06-12520041SHUILIXUEBAO1-PAHsST6--PAHs6--PAHsSRASRr6--PAHsSIASIrS06--PAHsABPB23023516--PAHs3SRA/S06--PAHsSIA/S06--PAHsST/S06--PAHs36--PAHs6--PAHs6--PAHs196--PAHs6--PAHs6--PAHs6--PAHs6--PAHs6--PAHs3146--PAHs19286--PAHs6--PAHs191MonteCarlo2002006--PAHs10102106--PAHs6.95mgL66756--PAHs7.44mg/L63.6956--PAHs1.77mgL6--PAHs8.74756--PAHs1.98mgL9.78956--PAHs5.19mgL6--PAHs25.4756--PAHs5.51mg/L26.76--PAHs95106--PAHs4952006--PAHs19995:=1.8794,=0.0807312620041SHUILIXUEBAO126--PAHs10ST/(mgL-1)ST/S0SRA/(mgL-1)SRA/S0SIA/(mgL-1)SIA/S05.190.2691.100.05664.090.21125%6.170.3161.490.07514.670.24050%()6.570.3281.620.08124.950.24775%6.950.3401.770.08745.190.25495%7.440.3641.980.09785.510.2678.510.3992.320.1166.240.2826.570.3291.630.08194.940.2470.5330.02050.2130.00970.3460.01196--PAHs36--PAHs5.77mg/L28.3%6--PAHs756.17mgL30.36--PAHs956--PAHs20.4975%6--PAHs21.80956--PAHs19.8727.436--PAHsIA/(mgL-1)IA/S0/4.390.22617.0025%5.140.26419.1550%()5.480.27319.7275%5.770.28320.4995%6.170.30321.807.080.33023.845.470.27419.870.4360.01651.1466--PAHs6--PAHs5295,20019812720041SHUILIXUEBAO195%=2.98790.057114106--PAHs56--PAHs6MonodMonteCarlo106--PAHs63.6956--PAHs9.78%956--PAHs26.7956--PAHs21.809530.3951TurloughFGuerin.BioremediationofphenolsandpolycyclicaromatichydrocarbonsincreosotecontaminatedsoilusingexsitulandtreatmentJ.JournalofHazardousMaterials.1999,B65:305-315.2SaylesGD,AchesonCM,ShanY.LandTreatmentofPAHcontaminatedsoil:performancemeasuredbychemicalandtoxicityassaysJ.Environ.Sci.Technol.1999,33:4310-4317.3ParkJH,ZhaoX,VoiceTC.DevelopmentofakineticbasisforbioavailabilityofsorbednaphthaleneinsoilslurriesJ.WaterResearch.2002,36:1620-1628.4MulderH,BreureAM,RulkensWH.PredictionofcompletebioremediationperiodsforPAHsoilpollutantsindifferentphysicalstatesbymechanisticmodelsJ.Chemosphere,2001,43:1085-1094.5Alcoa.LongtermmonitoringoflandtreatmentunitsinMassena,NewYorkM.InternalAlocareportpreparedbyEnvirogen,Inc.ForAloca'sEHSTechnologyCenter,AlocaCenter,PA.1998.6KarickhoffSW,BrownDS,ScottTA.SorptionofhydrophobicpollutantsonnaturalsedimentsJ.WaterResearch,1979,13:241-2487ChiouCT,PorterPE,SchmeddingDW.PartitioningequilibriumofnonionicorganiccompoundsbetweensoilorganicmatterandwaterJ.Environ.Sci.Technol.,1983,17:227-2318HaydukW,HLaudie.PredictionofdiffusioncoefficientsfornonelectrolytesindiluteaqueoussolutionsJ.AIChE,J..1974,20:611-615.PAHbioremediationinwetlandsystemandcontaminationriskanalysisLIULing1,LUGuihua1,MAOXiaowen212820041SHUILIXUEBAO1129(1.HohaiUniversity,Nanjing210024,China;2.JiangsuHydrologyBureau,Nanjing210029China)AbstractBasedonthemassbalancetheory,soilsequestrationtheoryandMonodkineticstheory,amathematicalmodelfordescribingthebioremediationprocessofpolycyclicaromatichydrocarbons(PAHs)inwetlandsystemisdevelopedinthispaper.Themodelisappliedtopredictthedegradationbehavior,thenecessarytreatmentdurationandtheendpointof6ringPAHsinwetlandsystem.ThecontaminationriskanalysisforPAHbioremediationinwetlandsystemisconductedusingMonteCarlosimulationtechnique.Itisfoundthat,after10yearsbioremediation,nogreaterthan636%6ringPAHsinsoilwillbedegradedwith95%probability,andnogreaterthan978%6ringPAHsinsoilwillcontinuetocontaminatebulkwaterwith95%probability.Furthermore,thenecessarytreatmentdurationfor6ringPAHsforreachigtheendpointinsoilwillbenotlongerthan218yearswith95%probability,withthesequestrationpartinsoilnogreaterthan30.3%.Keywordswetlandsystem;PAHs;bioremediation;contaminationriskanalysis