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当前位置:首页 > 商业/管理/HR > 企业文化 > 浮水植物型人工湿地对水稻田排水中氮磷污染的控制效果英文方荣杰
ControlEffectofFloatingPlantsConstructedWetlandtoNitrogenandPhosphorusPollutionfromRiceFieldDrainageFANGRong-jie12*TANMao-lan11.CollegeofEnvironmentalScienceandEngineeringGuilinUniversityofTechnologyGuilin541004China2.GuangxiKeyLaboratoryofEn-vironmentalEngineeringandProtectionAssessmentGuilinUniversityofTechnologyGuilin541004ChinaAbstractObjectiveThecontroleffectoffloatingplantsconstructedwetlandtonitrogenandphosphoruspollutionfromricefielddrainagewasstudied.MethodFirstlythecharacteristicoffloatingplantsandthepurificationprincipleofpollutantswereintroducedandthenpurificationeffectwasanalyzedthroughcontrollingnitrogenandphosphoruspollutionfromricefielddrainagebyfloatingplantsconstructedwetland.ResultBymeansoffloatingplantsconstructedwetlandtheaverageremovalrateoftotalnitrogenTNfromdouble-seasonearlyandlatericefielddrainagereached52.17%and62.23%respectivelywhilethatoftotalphosphorusTPwas45.69%and74.37%respectivelywithbetterremovaleffect.Meanwhilefloatingplantshaveecologicalandornamentalvaluetosomeextent.ConclusionFloatingplantsconstructedwetlandcouldnotonlycontrolnitrogenandphosphoruspollutioninfielddrainageeffectivelybutalsokeepfarmlandecosysteminhealthystate.KeywordsFloatingplantsConstructedwetlandTNTPPurificationeffectChinaReceivedNovember82010AcceptedNovember232010SupportedbyNaturalScienceFoundationofGuangxiProvince0991026FoundationofGuangxiKeyLaboratoryofEnvironmentalEngineeringandProtectionAssessment0701K019ProjectofEn-vironmentalEngineeringInnovationTeamofTalentSmallUplandCon-structioninUniversitiesinGuangxi2007Number71InnovationProgramProjectofPostgraduateEducationinGuangxiProvince2009105960815M25.*Correspondingauthor.E-mailglfrj@126.comConstructedwetlandisbuiltbytheoptimizingsimulationofnaturalwetlandsystemandisaecosystemwhichdisposessewagethroughphysicalchemicalandbiologicaleffectandmedium-plant-microorganismisasecologicalenvironment1-5.Since1970sconstructedwetlandtechnologyhasdevelopedrapidlyandhasbeenwidelyusedintheremovalofnitrogenandphosphorusduetotheadvantagesoflessinvestmentgoodeffectandconvenientoperationmaintenance6-7.Amongdif-ferenttypesofconstructedwetlandsurfaceflowwetlandhastheadvantagesofshortmaturitylowoperationcostofcapitalconstructionandsimilartonaturalwetland8-9andissuitableforthecontrolofnon-pointsourcepollutionfromfarmlanddrain-age.Comparedwithemergentandsubmergedplantfloatingplantcanadaptwiderangeofwaterdepthduetofloatingonwaterandhasstrongreproductivecapacityremovingnitrogenandphosphoruseffectively8whileitiseasytoplantharvestandmanageasanimportantplantusedinsurfaceflowwet-land.Astypicalfloatingplantslotusandwaterlilycanpurifywatereffectivelyandhavecertainornamentalandecologicalvalue.FloatingplantsconstructedwetlandstudiedinourpaperislocatedinQingshitanirrigationdistrictinGuilinCityinGuan-gxianddouble-seasonricewasplantedintheirrigationdis-trictwhilethegrowthperiodofearlyriceisfromMaytoJulyandthatoflatericeisfromJulytoSeptember.1Characteristicandpurificationprincipleoffloatingplant1.1CharacteristicoffloatingplantWiththecharacteristicofstrongreproductivecapacityfloatingplantcanreleaseoxy-gentowaterfromrootsbymeansofphotosynthesisandcanabsorbnutrientgreatlysoNPandheavymetalcanbere-movedeffectivelybymeansofplantuptake.Commonfloatingplantsincludelotuswaterlilywaterhyacinthduckweedandsoon.Lotusandwaterlilywerestudiedinourpaper.1.2PurificationprincipleoffloatingplantWetlandcanpurifypollutantsinwaterthroughadsorptionandinterceptionofsedimentplantuptakeroot-zonereactionandmicrobialdeg-radation.Plantplaysanimportantroleinwetlandpurificationontheonehandplantrootswithlargesurfacecanadherelotsofmicroorganismsandrhizospherecancreatemicroenviron-mentwhichisbeneficialtothegrowthofvariousmicroorgan-ismsontheotherhandplantcantransportoxygenfromstemsandleavestorootsformingaerobicmicro-zonenearrootswhichcanpromotetheconversionoforganicmatterNandPinadditionplantuptakefornutrientisthemainwaytopurifywater.Withlargeareaofleaveslotuscanresistsolarradiationandreducethematerialexchangebetweenatmos-phereandwatersurfaceofwetlandandoxygeninatmospherecannotbesupplementedinwetlandinstantlyforminganaero-bicenvironment.Meanwhileanaerobicenvironmentoflotusandwaterlilycanspeedupdenitrificationandpromotethede-compositionofNandP.Inadditionlotusandwaterlilycanflowerandhaveappreciationvalue.EditorYANGYingyingProofreaderWANGNanlingMeteorologicalandEnvironmentalResearch201011170-722Purificationeffectoffloatingplantscon-structedwetlandFloatingplantswereplantedinconstructedwetlandandmeasuringweirwassetatinletandoutletofconstructedwet-landwhilepollutantinfielddrainageflowedintoconstructedwetlandthroughinletanddischargedthroughoutletafterpurifi-cation.Thepurificationeffectwasanalyzedaftertestingwaterqualityatinletandoutlet.2.1RemovaleffectofTNinearlyandlatericefielddrain-ageFromFig.1theremovalrateofconstructedwetlandtoTNwasonly16.45%atreturninggreenstageofearlyrice.Af-fectedbyfieldfertilizationbeforesowingNconcentrationinfielddrainagewashigheratreturninggreenstageofearlyricewhilericewaslittlewithpoorfertilizerabsorptionabi
本文标题:浮水植物型人工湿地对水稻田排水中氮磷污染的控制效果英文方荣杰
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