不同曝气方式对城市重污染河道水体氮素迁移与转化的影响刘波

3210201110ENVIRONMENTALSCIENCEVol．32No．10Oct．2011121*11111.2100462.226007、．NH+4-NNH+4-N＜＜3NH+4-N9.40、11.24、19.30mg·L－12-、NH+4-NNH+4-N64.36%58.73%39.53%38.78%9d16dNO－2-NNO－2-N17d14d．X552A0250-3301201110-2971-082010-11-292011-03-30BE20086772010-K7-71976～[e-mail]*[e-mail]ionWaysonMigrationandTransformationofNitrogeninHeavilyPollutedUrbanRiverLIUBo12WANGGuo-xiang1WANGFeng-he1DUXu1LINGFen1XIAJin11.CollegeofGeographyScienceNanjingNormalUniversityNanjing210046China2.SchoolofGeographyScienceNantongUniversityNantong226007ChinaAbstractWaterandsedimentsampleswerecollectedfromaheavilypollutedurbanriverintheXianlinUniversityTownofNanjing．Weexaminedtheeffectsofdifferentaerationwaysaeratingtosedimentsaeratingtowateronmigrationandtransformationofnitrogenusingtheindoorexperimentalmethod．TheresultsshowedthatnitrogenreleasefromsedimentsintheformofNH+4-NthatwillaccumulateunderanaerobicconditionswithincreasingtemperaturethemaximumaccumulationofNH+4-Ninoverlyingwatershowedthataeratingtowatergroup＜aeratingtosedimentgroup＜controlgroupandthemaximumconcentrationsreached9.40mg·L－111.24mg·L－1and19.30mg·L－1respectivelynitrogencompoundsweregenerallyeliminatedfromexperimentsystembyaprocessofammoniavolatilizationandacombinationoftwoprocessesi．e．nitrificationanddenitrificationunderaeratingconditionsaeratingtosedimentwasmoreeffectivefornitrogenremovalthanaeratingtowaterwhichwasremovedfromoverlyingwaterporewaterandsedimentattheexperimentalendpointtheconcentrationsofNH+4-Ninporewaterandsedimentweresignificantlydecreasedby64.36%and58.73%respectivelycomparedwiththosebeforeaerationinaeratingtosedimentgroupandthatweredecreasedby39.53%and38.78%respectivelyinaeratingtowatergroupduringnitrogentransformationprocessinoverlyingwaterstart-upofnitrificationwasslowlyunderaeratingconditionsittook9daystorealizenitrificationunderaeratingtowaterconditionsand16daysundersedimentaerationconditionstheNO－2-NaccumulationtookplaceinoverlyingwaterundertheconditionofaerationthesustaintimeofNO－2-Naccumulatingwas17daysinaeratingtowatergroupandthatwas14daysinaeratingtosedimentgroup．Keywordsaerationwaysreleaseofnitrideammoniavolatilizationsedimentnitrification．12．3～6、．．DOI:10.13227/j.hjkx.2011.10.029327～910．1112、13、1415．11NH+4-N．、．、．11.1201043100mm×500mm20cm．．0.45μm4℃．3．0～4cmpH7.7856.37%LOI6.16%1.4．1.21250mL25cm．33EW、ESEC．EW1～3mm2cmES1～3mm2cmEC．．3dALEASAP-98042L·min－112h·d－1RuanmingLZB-6．19～21℃．28d1～18d18d42d．1.32cm15mL15mL．4000r·min－120min．0.45μmSKALARSKALAR-SAN++DTN、NH+4-N、NO－3-NNO－2-N．DOYSI550pHMETTLERTOLEDOEL20．1.41.4.1LOI105℃6h%16．LOI105℃550℃6h17．1.4.2NH+4-NNO－3-N10g2mol·L－1KCl∶=5∶130min210nmNO－3-N420nmNH+4-N18．TN210nm1819．22.12.1.1NH+4-NNH+4-N1．ECNH+4-N--311d19.30mg·L－126d13.73mg·L－11.95．2NH+4-N---4．EWNH+4-N9d5.51mg·L－12792109.40mg·L－1ES16d11.24mg·L－1EW1.20．EWNH+4-N16d0.21mg·L－1ES22dEWESNH+4-N47.86%72.74%．1NH+4-NFig．1VariationofNH+4-Ninoverlyingwater2Fig．2Variationofnitricnitrogeninoverlyingwater2.1.22．1EC2aNO－3-N0.04mg·L－10.30mg·L－1NO－2-N0.002mg·L－10.42mg·L－1．NH+4-N12a．2aESNO－2-N+NO－3-N11.01mg·L－1EW1.56NH+4-N．2b2c2NO－2-NNO－3-NNO－2-NNO－3-N．EWESNO－2-N3792320.2mg·L－114d17d2.76mg·L－12.42mg·L－16.65mg·L－15.91mg·L－1．NO－2-NES0.24mg·L－12.66mg·L－1EW0.09mg·L－10.63mg·L－1NO－2-N34d．2.1.3DTNDTNDONDTN-DTN．DTN31、2DTN．ECDTNNH+4-N12d24.07mg·L－126dDTN17.92mg·L－11.89．EWESDTNNH+4-N11.56mg·L－114.37mg·L－1NH+4-NDTNDTNNH+4-NDTN7.56mg·L－112.83mg·L－1NO－3-NDTNEWNH+4-NDTN5.05mg·L－1ESNH+4-NNO－3-NDTNDTN4.53mg·L－1．2.23DTNFig．3VariationofDTNinoverlyingwater10～4cmE0．1DTNTNNH+4-NESEWESNH+4-NNH+4-N64.36%58.73%EW39.53%38.78%．NO－2-N+NO－3-NNO－2-N+NO－3-NNH+4-N．TN3TN5.15%、13.43%1.31%．1Table1VariationofDTNNH+4-NNO－3-NandNO－2-Ninporewaterandsediment/mg·L－1/mg·kg－1DTNNH+4-NNO－3-N+NO－2-NTNNH+4-NNO－3-N+NO－2-NE036.02±5.5230.54±4.330.11±0.023126.20±565.35202.49±28.433.72±0.85EC37.16±4.3530.30±4.860.16±0.033085.14±500.44270.24±36.450.85±0.24ES16.47±1.6510.88±1.820.47±0.022706.35±212.6283.56±11.460.28±0.10EW25.66±5.0218.47±1.740.26±0.042965.18±400.43123.97±22.470.48±0.1033.1NH+4-NNH+4-N2479210NH+4-N2021．．NH+4-N11NH+4-N．NH+4-N22～24NH+4-NNH+4-N．10.3℃38.3～9.2℃10.0～11.0℃25．20℃．ECNH+4-NNH+4-NNH+4-NNH+4-NNH+4-N．．、NH+4-N2226．44h4EC0.34mg·L－10.53mg·L－1．ECNH+4-NNH+4-N．EWES7.22～8.78mg·L－1．EW12d4h1.5mg·L－1．ES4h0.92mg·L－1．2713．28hNH+4-N．28．-NH+4-NNH+4-N29．1ESNH+4-NNH+4-NEWNH+4-NNH+4-N．4DOFig．4VariationofDOconcentrationinoverlyingwater3.2NH+4-NNH+4-NNH+4-N．2NH+4-N．2．1NH+4-NNH+4-NNH+4-NNH+4-N．NH+4-N579232NH3-N、pHpH、NH3-N30．pH6～8pHNH3-N10pH895～10pH30．5EWESpH7.98～8.89EC7.12～7.65．pHCO2OH－31．H+HCO－3CO2pHpHpHpHpH32．pHpH．33．ESNH+4-N34．35．5pHFig．5VariationofpHinoverlyingwater3.3NH+4-Nammonia-oxidizingbacteriaAOBnitrite-oxidizingbacteriaNOB3637．3839．40．AOB、pH、freeammoniaFA4142．AOBpH7.0～8.043．5pHCO28.0AOBpHpH8.0．444.3mg·L－1．pHEW9dNO－2-NES16d．NO－2-N45．2NO－2-NNOB374546．NOBFApH37．FA0.5～3mg·L－1NOB47．EWFA14d0.58～1.74mg·L－1ESFA17d0.50～1.57mg·L－1FANO－3-N．．41NH+4-NNH+4-N．2NH+4-NNH+4-N679210pHNH+4-N．3pHDO9d16d．NO－2-N17d14d．4NH+4-NNH+4-N64.36%58.73%39.53%38.78%NH+4-N．1EggletonJThomasKV．Arevie