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。。[1]。[2]、、、[3]。、2010,29(7):1362-1368JournalofAgro-EnvironmentScienceCr6+0、10、20、40mg·L-1。1COD20、40mg·L-1TNTN10mg·L-140mg·L-1。210mg·L-120、40mg·L-1。3。Cr6+X701.3A1672-2043(2010)07-1362-07111123111.5300052.5300223.530005EffectsofChromiumonPurificationofDomesticWastewaterandItsAccumulationinConstructedWetlandsLIZhi-gang1,HUANGHai-lian1,LISu-li1,PUQi1,CHENWei-gang2,WANGZhen-feng3,CUIXin-xiao1,CHENYong11.CollegeofAgriculture,GuangxiUniversity,Nanning530005,China;2.EnvironmentalProtectionBureauofNanning,Nanning530022,China;3.GuangxiConstructionVocationalTechnologyCollege,Nanning530005,ChinaAbstractSandcultureexperimentswereconductedinordertostudytheeffectofdifferentconcentrationsofchromium0,10,20,40mg·L-1ondomesticwastewaterpurificationofCyperusalternifoliusandCoixaquaticaRoxbwetlandsandchromiumaccumulationrules.Theresultswereasfollow1Attheseedlingstage,theCODremovalratesgraduallyincreasedalongwiththeenhancementofchromiumconcentration,buttheyweresignificantlyinhibittedunderthetreatmentsof20,40mg·L-1intheotherstagesexceptthefloweringstageofCyperusalterni－folius;TNremovalrateofCyperusalternifoliuswetlandwasn′tsignificantlyaffectedalongwiththeincreaseofCr6+concentrations,butitwasinhibittedasfarasCoixaquaticaRoxbwetlandwasconcernedexcepttreatmentwithCr6+10mg·L-1atfloweringstage;Thesetwowetlandshadgoodpurificationeffectsondomesticwastewaterwhichcontainedchromium.ChromiumwasonlydetectedinwaterthatflowedoutfromtheconstructedCyperusalternifoliuswetlandunder40mg·L-1treatment.2TreatmentwithCr6+10mg·L-1inducedtheenhancementofCyperusalternifoliusandCoixaquaticaRoxbbiomass,buthigherconcentrations20mg·L-1and40mg·L-1showedinhibitioneffectsonthebiomass.3FinesandandplantrootshadgreatcapabilitiesofadsorptionandaccumulationofCr6+inwastewaster.ChromiumcontentsinfinesandandplantssignificantlyincreasedalongwithCr6+concentrationenhancement.Theaccumulationsofchromiuminrootsofthetwoplantsweresignificantlyhigherthanthoseinshoots,provingthatrootschromiumofthetwoplantswerehardlytransferedtotheshoots.Keywordsconstructedwetland;Cr6+;purification;domesticwastewater;accumulation2009－12－280719005-2-2B0816002-40501021969—、。E-maillizhigangnn@163.com297[4]。[5-9]CoixaquaticaRoxb。。11.1CyperusalternifoliusCoixaquaticaRoxb。、71cm45cm61cm10cm2～5cm40cm10cm1。2008996COD36.50～41.50mg·L-1TN6.91～8.81mg·L-1TP0.87～1.15mg·L-1NH3-N4.91～7.09mg·L-1。2009213。0、1、10、20、30、40mg·L-150mg·L-1Cr6+50mg·L-11mg·L-10、10、20mg·L-140mg·L-1Cr6+。2009316Cr6+10Cr10、20mg·L-1Cr2040mg·L-1Cr40Cr6+0Cr6+CK37d135LCr6+。1.2[10]。220420、4215255266262dCODTN-3510。COD、TN、、3。616、、30min100℃65℃60。。HNO3-HClO4[11]。0～20cm、100。HNO3-H2O2EPA3050B[12]。1.3SPSS13.0Excel3±。13632010722.12.1.1COD2COD40mg·L-1Cr6+Cr402.88%9.15%、10.78%11.78%。CODCr20Cr40CODCr10Cr2015.76%12.29%Cr20Cr409.62%12.63%。2.1.2TN3TNCr405.58%。TNCr20Cr4010.89%、14.55%20.90%、38.95%Cr4032.60%。TN。2.1.3Cr400.03mg·L-1。4。2.21Cr6+1364297。Cr1020.29%46.76%Cr2028.57%Cr40、、26.91%、22.20%、28.72%48.29%。Cr6+Cr10Cr20Cr40。2.323。。。2.44Cr6+Cr6+。2Cr6+Table2ThechangesofCrcontentsinplantsunderdifferentCr6+concentrationstreatmentPlantspeciesTreatmentchromiumcontent/mg·kg-1rootsstemsleavesCyperusalternifoliusCK40.16±5.01D3.88±1.25D2.63±0.00DCr101636.84±16.28C50.18±3.32C70.23±6.51CCr203353.38±28.13B197.95±2.15B152.82±3.73BCr407339.69±24.92A445.37±4.49A284.12±2.32ACoixaquaticaRoxbCK47.73±6.63D18.89±3.30D17.64±2.16DCr101640.48±14.47C63.91±2.45C58.94±3.81CCr201895.45±12.12B92.73±2.09B138.92±5.04BCr402325.82±25.56A139.17±5.52A260.54±6.76AP0.01。NoteDifferentbiglettersinthesamecolumnmeantsignificantdifferenceamongtreatmentsat1%levelthesamebelow.1g·-1Table1TheeffectsofchromiumonplantbiomassgDW·pot-1P＜0．05。NoteDifferentsmalllettersinthesamecolumnmeantsignificantdifferenceamongtreatmentsat5％level．TreatmentCyperusalternifoliusCoixaquaticaRoxbrootsstemsleavesrootsstemsleavesCK37.68±2.64a159.07±7.58b105.50±9.88a140.24±8.12b380.70±13.49ab130.93±4.94aCr1040.99±2.58a191.34±9.67a115.73±7.51a205.82±18.06a418.26±25.88a143.23±7.57aCr2035.99±2.71a153.09±10.71b92.59±2.65ab100.18±8.82c355.98±25.72ab120.21±9.89aCr4027.54±1.38b123.75±5.77c75.20±5.20b72.52±3.39c326.53±19.47b115.91±12.62a1365201074Cr6+Table4ThechangesofCraccumulationinfinesandunderdifferentCr6+concentrationstreatmentTreatmentchromiumcontentinfinesand/mg·kg-1CyperusalternifoliuswetlandCoixaquaticaRoxbwetlandCr05.13±1.25D6.38±2.17DCr10151.61±2.46C210.26±6.96CCr20363.16±5.73B431.41±5.42BCr40606.00±9.28A647.32±10.53A。NotechromiumaccumulationisCruptakeofplantsperunitarea3Cr6+Table3ThechangesofCraccumulationinplantsunderdifferentCr6+concentrationstreatmentPlantspeciesTreatmentchromiumaccumulation/mg·m-2rootsstemsleavesCK3.82±0.48D1.56±0.50D0.70±0.00DCr10169.55±1.69C24.27±1.61C20.54±1.90CCr20304.98±2.56B76.58±0.83B35.76±0.87BCr40510.80±1.73A139.28±1.40A53.99±0.44ACK16.91±2.35D18.18±3.18D5.84±0.71DCr10853.24±7.53A67.55±2.59C21.33±1.38CCr20479.85±3.07B83.42±1.88B42.20±1.53BCr40426.23±4.68C114.84±4.56A76.31±1.98ACyperusalternifoliusCoixaquaticaRoxb。3PELim[13]CODZn、Pb、CdZn、Pb、Cd、CuCu、Zn、Pb、CdCODTN[14]。COD。、。[15]、[16][17]。COD、、COD。、/。[18]。