阿什河丰水期氮污染特征及其来源分析

373737373737373737373737373737373737373737373737373737373737373737373737373737EnvironmentalScience&Technology3711201411Vol.37No.11Nov.2014《》2[e-mail]*[e-mail]。马广文1，王业耀1*，香宝2，刘玉萍3，胡钰2,4，张立坤2，金霞21.1000122.1000123.1500564.100875。。22δ15N-NO3－1.94‰～3.27‰、4.62‰～7.80‰、8.38‰～9.89‰、15.17‰～15.35‰4。。、。δ15NX508Adoi10.3969/j.issn.1003-6504.2014.11.0221003-6504(2014)11-0116-05NitrogenPollutionCharacteristicsandSourceAnalysisinAshiRiverduringWetSeasonMAGuangwen1,WANGYeyao1*,XIANGBao2,LIUYuping3,HUYu2,4,ZHANGLikun2,JINXia21.StateEnvironmentProtectionKeyLaboratoryofEnvironmentalMonitoringQualityControl,ChinaNationalEnvironmentalMonitoringCentre,Beijing100012,China;2.StateEnvironmentProtectionKeyLaboratoryofRegionalEco-processandFunctionAssessment,ChineseResearchAcademyofEnvironmentalScience,Beijing100012,China;3.HeilongjiangResearchInstituteofEnvironmentalProtectionScience,Harbin150056,China;4.CollegeofWaterScience,BeijingNormalUniversity,Beijing100875,ChinaAbstractNitrogenpollutioncharacteristicsbasedonwaterqualitymonitoringofAshiRiverwasstudiedandnitrogensourceswereanalyzedbynitrogenisotopestracetechniqueduringtypicalwetseason.ResultsshowedthattherewaslowammoniaconcentrationintheRiver,withhightotalnitrogenconcentrationandhighcontributionofdissolvednitratenitrogentototalnitrogen.δ15N-NO3－valueof22samplingpointswereintherangefrom1.94‰to3.27‰,4.62‰to7.80‰,8.38‰to9.89‰,15.17‰to15.35‰.Thesourcesofnitratenitrogenduringwetperiodintheupstreamwerepartlyfromrainfallatmosphericdepositionandartificialfertilizers,aswellasfromlivestockfarmingandsewageintheRiver;inthemidstreamthesamplingpointsweremainlyaffectedbyartificialfertilizers;whileinthedownstreammainlyaffectedbysoilorganicnitrogenandindustrialwastewater.Bothpollutioncharacteristicsanalysisofammonianitrogen,totalnitrogenandnitratenitrogenandanalysisofnitrogensourcesduringwetperiodshowtheinfluenceofnon-pointsourcenitrogenpollutionontheRiver.KeywordsSonghuaRivernon-pointsourcenitrogenisotopestotraceδ15N-NO3－naturalabundance。2:111111111111111111111111111111111111111111111111111111111111111111111111111111[1]。。、、[2]。[3-7]、[8-9]。215N15N15N15N15N[10]。δ15N[11]。15N。11.1研究区概况126°40′～127°42′、45°05′～45°49′。545.7mm114。、1。、、、、784-6、91011、121-3。1.2监测点位确定与水样采集22GPSArcGIS101。A01、A02、A03、A04、A05、A06、A07、A08、A09、A10、A11、A12、A13、A14、A15、A16、A17、A18、A19、A20、A21、A22。A01~A12、A13~A18、A19~A22、、。2011724-26。4L2L2L、24h。1.3测定与分析方法、1《()》[12]。《》(GB3838-2002)[13]。0.45μm4℃24h15mL3mol/L1Table1TestmethodsandinstrumentsofwaterqualitynitrogenindicatorsHJ535-2009722HJ/T346-2007UV-2550-GB11894-89UV-2550373737373737373737373737373737373737373737373737373737373737373737373737373737NO3－Ag2O1g6.5gAg2O。pHpH5.5～6.0。AgClAgNO350mLAgNO3[14-15]。DeltaPlusCon－floFlashEA1112δ15Nδ15N±0.2‰。δ[16],δ15N1δ15N(‰)=Rsample-RstandardRstandard×100011δ15N(‰),RsampleRstandard15N-14N[17]。22.1总氮污染A040.90mg/L1.0mg/LA01、A03、A06、A10、A211.0~2.0mg/LA02、A05、A07~A09、A12~A14、A18~A201.0~2.0mg/LA11、A15~A17、A224.0~6.0mg/LA165.61mg/L2。、、、、1A04。、、、A16。。2.2氨氮污染《》(GB3838-2002)[13]A221.30mg/L340.91%A01、A02、A03、A04、A06、A07、A15、A17、A2036.36%A05、A11、A12、A13、A16、A18、A19、A2118.18%A08、A09、A10、A14。A01~A12、A08、A09、A10A15。A14。A21。2.3硝酸盐氮污染。A02、A05、A07~A09、A11A15~A17、、、A114.01mg/L4。A04。A10A18。2.4氮源解析111111111111111111111111111111111111111111111111111111111111111111111111111111214N15N15N/14N[18]。δδ15N[19]。δ15N0±3‰[20-21]δ15N8‰～20‰[20,22]δ15N2‰～8‰δ15N4‰～9‰[20,23]δ15N10‰δ15N10‰[24]δ15N-20‰～30‰。δ15Nδ15N。[25-27][28-29]。δ15N4。A01、A04A10、A18δ15N-NO3－1.94‰～3.27‰A01、A04A10、A18A03、A05~A06、A12~A15、A19~A22δ15N-NO3－4.62‰～7.80‰A03、A05~A06、A12A19~A20A13~A15A21~A22A02、A07~A08、A16~A17δ15N-NO3－8.38‰～9.89‰A02A17A07~A08A16A09、A11δ15N-NO3－15.17‰～15.35‰5。。、。31A221.30mg/LA114.01mg/LA165.61mg/L。、。2A01、A04A10、A18δ15N-NO3－1.94‰～3.27‰A03、A05~A06、A12~A15、A19~A22δ15N-NO3－4.62‰～7.80‰A02、A07~A08、A16~A17δ15N-NO3－8.38‰～9.89‰A09、A11δ15N-NO3－15.17‰～15.35‰。。[][1],,.[J].,2007,18(1):123-132.ZhangYubin,ZhengFenli,WuMin.Researchprogressina－griculturalnon-pointsourcepollutioncausedbysoilerosion[J].AdvancesinWaterScience,2007,18(1):123-132.inChi－nese[2].[J].,2013,36(1):175-181.ChenLing,LiuDefu,LiuQingxin,etal.Characteristicsofnon-pointsourcenitrogenpollutionloadinXiangxibasinduringraining[J].EnvironmentalScience&Technology373737373737373737373737373737373737373737373737373737373737373737373737373737201336(1)175-181.inChinese[3]LucRock,BenjaminHEllert.Nitrogen-15andoxygen-18naturalabundanceofpotassiumchlorideextractablesoilni－trateusingthedenitrifiermethod[J].SoilScienceSocietyofAmericaJournal,2007,71:355-361.[4]KevinSDillon,JeffreyPChanton.Nitrogenstableisotopesofmacrophytesassessstormwaternitrogeninputstoanur－banizedestuary[J].EstuariesandCoasts:JCERF,2008,31:360-370.[5]KoichiYoshii.StableisotopeanalysesofbenthicorganismsinLakeBaikal[J].Hydrobiologia,1999,411:145-159.[6]DouglasABurns,CarolKendall.Analysisofδ15Nandδ18OtodifferentiateNO3-sourcesinrunoffattwowatershedsintheCatskillMountainsofNewYork[J].WaterResourcesRe－search,2002,38(5):1051-