白洋淀府河中氮的来源与迁移转化研究王珺

3112201012ENVIRONMENTALSCIENCEVol.31No.12Dec.2010*100875δ15N.NH+4-NNO－3-Nδ15N1.35‰～8.01‰－6.69‰～8.36‰...NH+4-NNO－3-N86.3%44.6%55.4%.NH+4-NNO－3-N.X523A0250-3301201012-2905-062010-01-062010-04-05509790072008ZX07209-0071983～[e-mail]*[e-mail]onsofNitrogenintheFuheRiveroftheBaiyangdianLakeWANGJunGAOGaoPEIYuan-shengYANGZhi-fengStateKeyLaboratoryofWaterEnvironmentSimulationSchoolofEnvironmentBeijingNormalUniversityBeijing100875ChinaAbstractThesourcesandtransformationsofnitrogenintheFuheRiverwereinvestigatedbyapplicationofnitrogenisotopemethods.Theresultsshowedthatthevaluesofδ15Ninammoniumandnitratewere1.35‰-8.01‰and－6.69‰-8.36‰respectively.TheindustrialandmunicipalwastewaterfromtheBaodingCitycontributedhighammoniumtotheriver.Indryingseasontheprocessesofnitrificationanddenitrificationwereaffectedbybothofwaterandsediment.Inwettingseasonammoniumwasmainlyabsorbedbyplantsandlossrateofnitratewasabout86.3%.Thenitrateremovalbydenitrificationreached44.6%whereasthatbyplantuptakewas55.4%indicatingtheimportanceofvegetationinnitrogenremoval.Thusrestorationoflocalvegetationintheriverwouldbethekeytorelieveeutrophicationinthelake.Keywordsrivernitrogenisotopeseasonalpollutionsourcestransformations、.、、1～3..2070、.Segal-Rozenhaimer4.Deutsch5.3NO－3-NNH+4-NNO－3δ15N..15NNO－3-NNH+4-N.DOI:10.13227/j.hjkx.2010.12.0353111.1522.7mm7、82～3m6....1.26123456.、、71.、、..2009581.310～30cm.20%HCl..、pHDO.710cm30～4℃.1Fig.1SchematicgraphofsamplingsitesintheFuheRiver1.37TN-、NH+4-NNO－3-N.100NH+4-NNO－3-N8.NH+4-NNO－3-Nδ15N910NH+4NO－3.BioradAG50W-X8100-200H+3mLDowex1-X8OH－3mL.6mL/min.3mol/LHCl.Ag2O6.5gpH5.5～6.0AgCl.AgNO3DeltaPlusXP15N.δ15Nδ15N‰=15N/14N/15N/14N－1×10001δ15N±0.2‰.22.1NH+4-NNO－3-N531.5mmDO1.62～5.67mg/L3.98mg/L.2NH+4-NNO－3-N22.19、1.43mg/L.1NH+4-N36.92mg/LNO－3-N0.22mg/L.2NH+4-N20.02mg/L1NO－3-N3.45mg/L.3NH+4-NNO－3-N.6NH+4-NNO－3-N14.27、0.75mg/LNH+4-N79.4.8153.0mmDO0.92～3.97mg/L1.74mg/L.NH+4-N13.04～24.24mg/L18.13mg/L.NO－3-N0.43～3.17mg/L1.69mg/L.NH+4-NNO－3-N.160921217.98mg/L2.2NH+4-NNO－3-NFig.2VariationofNH+4-NandNO－3-NconcentrationsintheFuheRiver2.2NH+4-NNO－3-N3NH+4-N.NH+4-N61.01、55.59mg/kg.197.65、131.47mg/kg619.72、4.78mg/kg.NO－3-N.NO－3-N8.32～31.63mg/kg18.76mg/kg.NO－3-N0.59～25.97mg/kg13.80mg/kg.3NH+4-NNO－3-NFig.3VariationofNH+4-NandNO－3-NconcentrationsinthesedimentoftheFuheRiver2.3NH+4-NNO－3-Nδ15N4δ15N-NH+4δ15N-NO－31.35‰～8.01‰－6.69‰～8.36‰.δ15N-NH+46.δ15N-NH+44.23‰～5.60‰.δ15N-NO－3.δ15N-NO－321.36δ15N-NO－3.δ15N-NO－3－3.52‰～4.05‰.4δ15N-NH+4δ15N-NO－3Fig.4Variationofδ15N-NH+4andδ15N-NO－3intheFuheRiver33.114N15N.、.δ15Nδ15N－4‰～4‰δ15N0‰±3‰δ15N－10‰～15‰11δ15N10‰～20‰12δ15N10‰13.δ15N.1NH+4-NNO－3-N.NH+4-NNO－3-NNH+4-N.1NH+4-N36.92mg/LNH+4-N.δ15N-NH+44.11‰δ15N10‰.δ15N0‰±3‰δ15N.4δ15N.709231.7NH+4-Nδ15N-NH+4.δ15N-NH+40.79‰2.07‰..3.2NH+4-NNH+4-N、.pH.NH+4NH3pH9.314pHpHNH+4.pH7.16～8.25δ15N-NH+4.NH+4-N14Nδ15N-NH+43mg/Lδ15N.15δ15N-NH+4.15NNH+4-NNH+4-Nδ15N.3.2.112NH+4-N45.8%NO－3-N14.5.δ15N-NH+44.11‰4.45‰.NH+4-N15NNO－3-N.、16NH+4-NNH+4-N.35δ15N-NH+4NH+4-N.6δ15N-NH+41.35‰δ15N.6δ15N-NH+44NH+4-Nδ15N.NH+4-Np0.01R2=0.853-NH+4/.12NH+4-N97.65mg/L71.09mg/L.NH+4-N15N17δ15N-NH+4.3.2.2DO.DO1mg4.5mgDO18.DO2mg/L19.DO1.74mg/L.δ15N-NH+4NH+4-N.、NH+4-N.δ15N-NH+4NH+4-N.NH+4-N..3.3NO－3-NNO－3.15NNO－3NO－3-Nδ15N.3.3.112NO－3-N.NO－3δ15NNH+4δ15N4.2δ15N-NO－38.36‰δ15N-NH+4..δ15N-NO－3NO－3-Np0.05R2=0.475NO－3-Nδ15N-NO－320.809212DO.O2NO－3-N.DO0.2mg/L.Gillham21DO2.0mg/LDO2～6mg/L2223.DO2mg/L.δ15N-NO－3NO－3-N.δ15N-NO－3DO.3.3.2NO－3-Nδ15N-NO－3p0.01R2=0.887.DO1.74mg/L2mg/L..δ15N-NO－3.δ15N-NO－3δ15N-NO－3.δ=δ0+εlnN－lnN02δ0、δNO－3δ15NN0、NNO－3ε.5δ15NlnNε－4.16‰NO－3-N.－17‰～－29‰2425NO－3-N－3.5‰～－16‰25.Lund26NO－3-N－2.5‰.、DO、、NO－3-N.5δ15N-NO－3lnNO－3Fig.5Relationshipbetweenδ15N-NO－3andlnNO－3intheFuheRiverinwettingseasonNO－3-N.ε=－17‰24ε=0‰NO－3-Nε－4.16‰.6Lund26NO－3-N86.3%44.6%55.4%.6Δδ15NlnN/N0Fig.6RelationshipbetweenΔδ15NandlnN/N0intheFuheRiverinwettingseason41NH+4-N909231.2.3NH+4-NNO－3-N86.3%44.6%55.4%.NH+4-NNO－3-N.1DoddsWKEvans-WhiteMAGerlancNMetal.QuantificationofthenitrogencycleinaprairiestreamJ.Ecosystems200036574-589.2TangCAzumaKIwamiYetal.NitratebehaviourinthegroundwaterofaheadwaterwetlandChibaJapanJ.HydrolProcess200418163159-3168.3.J.2009291351-358.4Segal-RozenhaimerMShavitUVengoshAetal.SourcesandtransformationsofnitrogencompoundsalongtheLowerJordanRiverJ.JEnvironQual20043341440-1451.5DeutschBVossMFischerH.NitrogentransformationprocessesintheElbeRiverdistinguishingbetweenassimilationanddenitrificationbymeansofstableisotoperatiosinnitrateJ.AquatSci2009712228-237.6.J.20052551033-1040.7.M..2002.8.M..1999.9LehmannMFBernasconiSMMcKenzieJA.AmethodfortheextractionofammoniumfromfreshwatersfornitrogenisotopeanalysisJ.AnalChem200173194717-4721.10SilvaSRKendallCWilkisonDHetal.AnewmethodforcollectionofnitratefromfreshwaterandtheanalysisofnitrogenandoxygenisotoperatiosJ.JHydrol20002281-222-36.11KendallCMcdonnellJJ.IsotopetracersincatchmenthydrologyM.AmsterdamElsevierScience1998.519-576.12KreitlerCW.Nitrogenisotoperatiostudiesofsoilandgroundwaternitratefromalluvialfanaquif