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:025322468(2002)20320329204:X171:A,,(,310029):(EichhorniacrassipesSolms),,1011g250mL10mgPL763152%10d,9919%,4011%,67128%,23197%:;;Phytoremediationofmethylparathionbywaterhyacinth(eichhorniacrassipessolms)XIAHuilong,WULianghuan,TAOQinnan(CollegeofEnvironmentalandResourceSciences,ZhejiangUniversity,Hangzhou310029)Abstract:Thepurificationefficiencyandmechanismofmethylparathionbywaterhyacinth(EichhorniacrassipesSolms)werestudied.There2sultsshowedthatthedegradationrateconstantofmethyl2parathion10mgPLin250mLwatersolutionwasenhancedby716foldwith1011gfreshweightofwaterhyacinthcomparedtotheunplantedwatersolutioninasterilecondition1Thedegradationrateofmethylparathionwas9919%inwatersolutionplantedwithwaterhyacinth,anditwas4011%inunplantedwatersolutionafter10days.Asplantuptaketookup67.28%andmicroorganismdidabout23197%tothetotaldegradationofmethylparathion,uptakebywaterhyacinthanddegradationbymi2croorganismmightbethemainphytoremediationprocesses.Keywords:waterhyacinth;phytoremediation;methyl2parathion:2001204216;:2001206225:(39970432):(1961),,()(EichhorniacrassipesSolms)[1],[2,3],..,,,,,.11118015%,;22320025ACTASCIENTIAECIRCUMSTANTIAEVol.22,No.3May,2002.,MS[4]1.112MS[4](EDTA2Fe)2,,10mgPL,A;10mgPL,10mgPL[5],B.500mLPET,,AB250mLP.,,1011gP,PET,1P.500mLPET,B250mLP,.LRH22502G,251,14h(1500lx)10h.,24h5mLMS(EDTA2Fe).2472120168240h,.3.20mLMS,.-15,Sa2vantNovalyphe2NL500,,P(4:1,VPV),P[6].500mL,,,[6].GC214BFPD[7].:95136%,92118%.1Fig.1Degradationofmethylparathioninwater2211.(1).:Ct=C0e-Kt,Ct(mgPL),C0(mgPL),K(h-1).0100244h-1(r=0197),0102107h-1(r=0194),0102769h-1(r=0192).,,:0102107-0100244=0101863h-1,,0100662h-1.03322763152%,,716.0102769h-1,67128%,23191%,8181%.,,.21272h,,,120h,(1).,,0117%9111%,,.,.Burken[8],.,80%[9].,,,,,,,,.12,240h,0101mgPL,3mgPkg,.1Table1Accumulationofmethylparathioninwaterhyacinth,h,g,g,g,%2420.637.8213.855.3734.4813.191.947240.264.3818.832.4759.086.853.8112046.3020.6726.4721.2072.7741.874.871681.220.1913.824.5115.485.331.022400.550.012.700.912.821.540.19248.624.044.000.4910.955.910.657232.489.3130.682.0736.606.954.2412080.2812.6753.9218.29128.0018.049.111680.980.108.486.419.466.510.632400.440.362.421.312.601.320.17:SD(12),72h.,,.1333:2Table2Concentrationofmethylparathioninwaterandwaterhyacinth,h,mgPL,gPg(DW),gPg(DW)P242.810.36134.9838.9018.986.177.11722.220.25188.6016.5825.652.497.351201.140.46360.5961.7437.649.589.581680.040.027.131.9120.888.960.342400.012.790.073.621.330.77243.200.1342.1222.566.320.276.66722.460.19176.2614.9956.182.633.141201.500.54341.0137.90132.8885.082.571680.150.066.530.8011.748.160.562400.013.262.983.722.350.88:SD,,.3,,..1011g250mL10mgPL763152%,.,67128%,23197%..:[1],.I..[J],1984,(5):3640[2]MuuramotoS,OkiY.Removalofsomeheavymetalsfrompollutedwaterbywaterhyacinth(Eichorniacrassipes).BullEnvironCon2tamToxicol[J],1983,30:170177[3]DelgadoM,GuardiolaE,BigeriegoMJ.Organicandinorganicnutrientsremovalfrompigslurrybywaterhyacinth[J].EnvironSciHealth,PartAEnvironSciEngToxicolHazardousSubstance,1995,30:14231434[4].[M].:,1990.458459[5]ChapinFS,MoilanenL,KiellandK.Preferentialuseoforganicnitrogenforgrowthbyanon2mycorrhizalarticlesedge[J].Nature,1993,361:150153[6],.[J].,1989,16(2):125130[7]WanHB,XiaHL.ChenZ.Extractionofpesticideresiduesinteabywaterduringtheinfusionprocess[J].FoodAdditivesandContaminants,1991,8:497500[8]BurkenJG,SchnoorJL.Predictiverelationshipsofuptakeoforganiccontaminantsbyhybridpoplartrees[J].EnvironSciTechnol,1998,32:33793385[9]AitchisonEW,KelleySL,AlvarezPJJ,etal.Phytoremediationof1,42Dioxanebyhybridpoplartrees[J].WaterEnvironRe2search,2000,72:31332123322