4种禾草用于覆盖层灌溉垃圾渗滤液的比较

　2005,11(5):554～558　　ChinJApplEnvironBiol=ISSN1006-687X　2005-10-25　4*王如意　何品晶**　邵立明　张斌　李国建(　　200092)　　、、、4,.,12mmd-1,、、,.15%,4,,;:.,;.COD52.5%～57.6%64.3%～66.1%,,61.3%～91.2%,COD66.4%～94.0%.、COD,.COD,,.4119　;;;;CLC　X705∶Q945.78COMPARISONOFFOURGRASSESUSEDASCOVERFORIRRIGATIONTREATMENTOFLANDFILLLEACHATE*WANGRuyi,HEPinjing**,SHAOLiming,ZHANGBinLIGuojian(StateKeyLaboratoryofPollutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China)Abstract　Recirculatedlandfillleachatewasirrigatedintomimiclandfillvegetationtoanalyzetheeffectofdifferentvolumeconcentrationsanddifferentgrassesonleachatetreatmentefficiency.Fourgrasseswereselected:improvedbermudagrassDolsol(Cynodondactyloncv.Dolsol),commonhulledbermudagrass〔Cynodondactyoln(L.)Pers〕,vetivergrass(Vetiveriazi-zanioidesNash)andbahiagrass(PaspalumnotatumFlugge).Theresultsshowedthatallthegrassescouldsurvivewiththeir-rigationloadingof12mm/dforonegrowthseason,exceptthatbahiagrassdiedwithhighvolumeconcentration.Mostabovegroundbiomasswasobtainedwhenirrigatedwith15%volumeconcentration.Oncetheconcentrationsurpassed15%andincreasedgradually,vegetationbiomassdecreased,negativelyrelatedtovolumeconcentration.Thedecreasingrateofbiomassindicatedthattheresistantabilitytoleachatewas:bermudagrassvetivergrasscommonbermudagrassbahiagrass.Highvolumeconcentrationleachateresultedintheimbalanceofactivatedoxygenproductionandscavenge,acceleratedtheprocessoflipidperoxidationandimposedonthegrassesdetrimentally.Leachatevolumereductionof61.3%～91.2%andCODremovalof66.4%～94.0%wereobtainedrespectivelybyirrigatedleachateintograsscover,whileonly52.5%～57.6%and64.3%～66.1%intobarecover.Underlowvolumeconcentrationofleachateirrigation,thevolumeandCODreductionefficiencyofbermudagrasswasbetterthanthoseofvetivergrass,whilevetivergrassbetterthanbermudagrassunderhighvolumeconcentra-tionofleachateirrigation.ThegoodefficiencyofleachatevolumereductionandCODremovalmeantthatleachatetreatmentthroughirrigationonlandfillvegetationwasfeasible,andbermudagrassandvetivergrassweresuitablevegetationr.Fig4,Tab1,Ref19Keywords　recirculatedlandfillleachate;irrigationtreatment;grass;volumereduction;vegetationcoverCLC　X705∶Q945.78　　[1],,,:2004-08-12　　:2004-11-01*863(2001AA644010,2003AA644020)　SupportedbytheNational863ProjectsofChina**　Correspondingauthor(E-mail:[e-mail]),,[2].,[3],,,[4,5],,-.,,,,;,,.(Vetiveriazizanioides),,,[6,7],[8],[9].(Paspalumno-tatum),,[6,10,11].(Cynodondac-tylon),,、、、,,[12],[13].,34,,,,.1　1.1　4:()(Cynodondactyloncv.Dolsol)、()〔C.dactylon(L.)Pers〕、(VetiveriazizanioidesNash)(PaspalumnotatumFlugge);(COD6000～15000mgL-1、NH3-N600～2000mgL-1,B/C0.2～0.3),(2a)(1).1.2　20033、、,26cm、20cm、26cm,;,1.5cm0.5cm、22cm;,,.,1.73%,0.039%,0.052%,pH8.3;、;5,:0(100%),15%、35%、70%100%()4,3.,4,12mmd-1(650mLpot-1d-1),,,COD.1.3　12mmd-16mo(10).,,,.,80℃,.1　Table1　CharacteristicsofrecirculatedlandfillleachateIndexRangeAveragevaluepH7.68～8.428.21ρ(BOD)/mgL-120～10060ρ(COD)/mgL-1500～18001000ρ(NH3-N)/mgL-1600～20001100ρ(NO3-N)/mgL-10～5015ρ(KN)/mgL-1660～22001200ρ(P)/mgL-13.354～4.6274.173ρ(Cl-)/mgL-11000～30001500ρ(Na)/mgL-1642.6～897.5764.1ρ(Cu)/mgL-10.019～0.0260.0215ρ(Zn)/mgL-10.243～0.2820.258ρ(Cr)/mgL-10.010.01ρ(Pb)/mgL-10.08～0.130.11ρ(Cd)/mgL-10.017～0.0220.019ρ(As)/mgL-10.0167～0.02290.0181ρ(Hg)/mgL-10.0035～0.00480.0042ρ(TOC)/mgL-1150～600350HA/TOC0.04～0.060.049%FA/TOC0.5～0.60.556HyI/TOC0.35～0.450.395HA:Humicacids;FA:Fulvicacids;HyI:Hydrophilic(MDA)(TBA)[14];[15];(H2O2)[16];(POD),A470nm0.011〔0.01ΔA470nmmin-1g-1〕[14];(SOD)(NBT),50%NBT,〔unit-1h-1〕[17].1.4　COD:　(%)=∑(Qin-Qout)∑Qin×100(1)　COD(%)=∑(CODinQin-CODoutQout)∑CODinQin×100(2)(1)(2):Qin,Qout-(mL)CODin,CODout-(mgL-1),,t-,P0.05,,P0.01;(x±s).2　2.1　42.1.1　　　l,,15%,4,(P0.05);,(100%)(70%)8;、、3,555　5:4　　,(P0.05),.15%,,3,,:y=-2.1175x+319.86(R2=0.9975),y=-1.0799x+275.09(R2=0.9552),y=-1.5803x+328.85(R2=0.9279);,.1　Fig.1　Effectsofrecirculatedlandfillleachateirrigationonabovegroundbiomassoffourgrasses○:C.dactylon;□:C.dactylon;△:V.zizanioides;×:P.notatum.　Thesamebelow2.1.2　　　,,.MDA,.2,、、3MDA15%,(P0.05),,,MDA,,,,3MDA(R=0.787,0.909,0.704);MDA,,MDA,,,,MDA;,、、MDA(R=-0.889,-0.949,-0.965),(R=-0.934,-0.992,-0.873),,,,.2,15%,3H2O2,,H2O2.、,H2O2,;H2O2.H2O2,SOD,,,,[16],,、H2O2,H2O2,.2.1.3　SOD、POD　　SODO2,O2H2O2O2,,,“”[18].3,SOD,,SOD,、35%,15%,,SOD,.,SOD.POD,,,[19].3,POD,,POD,35%,15%,POD,,,POD90.4%,、72.6%、51.8%.2　(A)、H2O2(B)(C)Fig.2　EffectsofrecirculatedlandfillleachateirrigationsterssonMDA(A),H2O2(B)contentandmembranepermeability(C)ofgrasses　　2,,.MDA、556　　　　　　　　　　ChinJApplEnvironBiol　　　　　　　　　　　　　　　　　11H2O2,,;MDA、H2O2,H2O2、MDA、,,,,.,MDA,SOD,MDA、.SOD、POD,SOD、POD,,;MDA.3　SODPODFig.3　EffectofrecirculatedlandfillleachateirrigationsterssonSODandPODenzymeactivitiesofgrasses2.2　COD,12mmd-1,COD52.5%～57.6%64.3%～66.1%,;,,61.3%～91.2%,COD66.5%～94.0%;、COD52.5%64.3%,、64.6%、62.1%61.3%,COD69.2%、66.4%68.4%,(4).,、、(R=0.804,0.663,0.952),,;COD(R=0.992,0.769,0.945),COD,,,、.,、COD,.4　CODFig.4　ComparisonofleachatevolumeandCODreductionefficiencythroughirrigationonmimiclandfillvegetationcover1:C.dactylon;2