潮汐流人工湿地的除氮效果及影响因素

28720157ＲesearchofEnvironmentalSciencesVol．28No．7July2015．J．20152871172-1178．ZHANGYaqiongCUILijuanLIWeietal．DepthvariationsandfactorsinfluencingnitrogenremovalintidalflowconstructedwetlandsJ．ＲesearchofEnvironmentalSciences20152871172-1178．[e-mail]．*[e-mail]1212*12121．1000912．100091TF-CWtidalflowconstructedwetlandA3〔ＲAT∶1∶1、1∶2、2∶1B、C、D〕175dTF-CWTN、NH4+-N、NO3－-N、TOC．A、B、C、DTN82.41%±4.84%、84.82%±5.09%、86.09%±3.99%、90.23%±3.05%．ATNNH4+-NB、C、DP＜0.05DTNNH4+-NANO3－-NＲATTOC．NH4+-N0～15cmρTOC0～20mgLρNO3－-N0～15cm．ρDO．TNNH4+-NρDO、ＲAT、OＲPoxidationreductionpotentialρTOCNO3－-NpH、．X5241001-6929201507-1172-07ADOI10.13198j．issn．1001-6929．2015．07．22DepthVariationsandFactorsInfluencingNitrogenＲemovalinTidalFlowConstructedWetlandsZHANGYaqiong12CUILijuan12*LIWei12LIKai121．InstituteofWetlandＲesearchChineseAcademyofForestryBeijing100091China2．BeijingKeyLaboratoryofWetlandEcologicalFunctionandＲestorationBeijing100091ChinaAbstractTostudythemainnitrogenremovalfactorsinatidalflowconstructedwetlandTF-CWidleresponsetimesＲATforthreedifferentwaterinputscenariosofTF-CWs1∶1B1∶2Cand2∶1DwerecomparedforacontinuousflowwetlandversusacontrolgroupA．Afterrunningtheexperimentfor175daystheremovalefficienciesanddepthvariationsofthetotalnitrogenTNammoniumnitrogenNH4+-NnitratenitrogenNO3－-NandtotalorganiccarbonTOCwereanalyzed．TheresultsshowedthattheaverageTNremovalratewas82.41%±4.84%forAand84.82%±5.09%86.09%±3.99%and90.23%±3.05%forthethreeTF-CWsBCandDrespectively．SignificantdifferencesexistedbetweenthecontrolAandtheTF-CWsBCandDP＜0.05．ScenarioDwasthemostefficientforTNandNH4+-Nremoval．ThecontrolAshowedhigherremovalefficiencyforNO3－-N．IngeneraltheidlereactiontimedidnotaffecttheremovalrateofTOC．TheNH4+-Nremovalratewasmaximallyefficientwhenthereactiondepthrangedfrom0to15cmandwithincreasingdepththeremovalrateslowed．ThestagealsoshowedrapidlyrisingρNO3－-NwhereasρTOCwaslower0-20mgLandfurtherdecreasedwithdepth．AlongeridletimecontributedtohigherρofdissolvedoxygenDO．TheTNandNH4+-NremovalratesdidnotsignificantlytemporallyvaryintheTF-CWs．ThemainfactorsaffectingtheremovalofTNandNH4+-NincludedDOidleresponsetimeoxidationreductionpotentialOＲPandTOC．TheNO3－-NremovalratebecameslowerasthetimeincreasedwhiletheothermainfactorsthatinfluenceditsremovalrateincludedpHconductivityandwatertemperature．Keywordstidalflowcontinuousflowconstructedwetlandnitrogenremovaldepth7、1．、2．ρDO、pH、、、、3．4-6、7TF-CWtidalflowconstructedwetland8．TF-CW910ρDOO211．TF-CW．TF-CW、、412．TF-CWO2．13、1415．TF-CW8．TF-CWTNρDO、ρTOC．TF-CWTF-CW1216-17．ＲDAredundancyanalysis18．ＲDA18TP19．TF-CWＲDATF-CW．11.1TF-CW40cm、110cm1138L15cm31cm．．90cm4～8mm42%．1TF-CWFig.1SimulationequipmentforTF-CW1.21.2.1TNTOC4m3．ρTN、ρNH4+-N30～50mgLρNO3－-N5mgLρTOC0～20mgLpH7～8．1.2.2TF-CWAＲAT∶03ＲAT1∶1、1∶2、2∶1B、C、D．120141—320144．1.3TF-CW20144—9371128175d715、30、45、60、75、90、105cm500mL4℃．3．、ρDO、OＲPoxidationreductionpotential、pH、YSI-EXO．ρTN、ρNH4+-N、ρNO3－-N、ρTOC20SMAＲTCHEM200WestCo．．1.4SPSS19.0α=0.05ＲDACanoco4.5．Origin8.5CanoDraw4.5．22.1TF-CWTF-CW8．1TN80%．one-wayANOVATNP＜0.05A3P＜0.05DB、CP＜0.05BCP＞0.05．TF-CWTND．1TF-CWTable1TheremovalefficiencyofpollutantsinTF-CWsimulatorunderdifferentwaterinputtingtype%TNNH4+-NTOCA82.41±4.84a94.58±2.73a66.29±12.87aB84.82±5.09b98.04±0.94b72.86±8.54bC86.09±3.99b98.56±0.73b76.51±9.96bD90.23±3.05c99.09±0.67c77.55±10.48b0.05．NH4+-NρNH4+-NρTN．NH4+-N21．TF-CWNH4+-N90%TN．TF-CWNH4+-NAB、C、DP＜0.05DB、CP＜0.05．2、1ρNO3－-NNO3－-NANO3－-NB、C、D．、ρTOC3TOC．2TF-CWFig.2TheeffectsofTF-CWsimulatorunderdifferentwaterinputtingtypeonpollutantsconcentrations471172.2TF-CWTF-CWρTN、ρNH4+-N、ρNO3－-N、ρTOC、ρDO3．3ρTN0～45cm＞45～105cm．ρNH4+-N0～15cm＞15～105cm．0～15cmρNO3－-N＞15～105cmρNO3－-N．0～105cmρTOC0～20mgLρTOC．B、D0～15cmρNH4+-N10mgL．NH4+-NDO0～15cm．3TF-CWFig.3ChangesofpollutantsconcentrationswiththedepthofprocessinginTF-CWsimulatorunderdifferentwaterinputtingtype2.3ＲDA4TN、NH4+-NNO3－-N．TN、NH4+-NＲAT、ρDO．NO3－-NρNO3－-NＲATρDO22．pH、、、NO3－-NTN、NH4+-NOＲP、ρTOC．2.4TNNH4+-NA3TF-CWB、C、DＲAT2∶1D．TNNH4+-NNH4+-N．TF-CW1314．TF-CWNO3－-NNO3－-NNO3－-N．NO3－-N23．571128TNＲE—TNNH4ＲE—NH4+-NNO3ＲE—NO3－-NTNIN—ρTNNH4IN—ρNH4+-NNO3IN—ρNO3－-NTOC—ρTOCOＲP—Time—DO—ρDOSal—Cond—Temp—．4ＲDAFig.4ＲDAordinationsforvariousenvironmentalfactors8．ρTOCNO3－-NCN24．Saeed25．、O2NH4+-N26NH4+-N9ρTOCNH4+-N．1gNH4+-N4.35gO21gBOD51.5g27BOD5TF-CWO228BOD550～100mgL．ρTOCNO3－-NNO3－-N．0～20mgLρTOCNO3－-N．CN．TF-CWTN、NH4+-NOUYANG29．ρDO0～15cmρDONH4+-N30．0～15cmNO3－-N＞15～45cmNO3－-NρTNsimultaneousnitrificationanddenitrificationSND31NO3－-NNH4+-NρNH4+-NρNO3－-N．ＲDATF-CWTNNH4+-NNO3－-N．TF-CWNH4+-N．ρNO3－-N0mgLNO3－-NNO3－-NρNO3－-NTF-CWNO3－-N．ρDOTN、NH4+-NNH4+-NρDO．NO3－-NpH、、、pH32TF-CW5℃2．NO3－-NρTOC4TF-CWρTOCρTOC．3aATN82.41%±4.84%ＲAT1∶1B、1∶2C、2∶1DTF-CWTN6711784.82%±5.09%、86.09%±3.99%、90.23%±3.05%TNP＜0.05DTN．ANH4+-NB、C、DP＜0.05DNH4+-NNO3－-N．TF-CWTOCTOC．bρNH4+-N0～15cm＞45～105cm．B、DρNH4+-N0～15cm10mgL．ρTOC0～20mgLTOCρTOC．0～15cmρNO3－-NρDO0～15cm．＞15～45cmTF-CWTN．cＲDAＲATρDO．TNNH4+-NρDO、ＲAT、OＲP、ρTOC．NO3－-NpH、、．Ｒeferences1CONLEYDJPAEＲLHWHOWAＲTHＲWetal．Controllingeutrophicat