地下水中硝态氮自然衰减的实验研究段磊

710054。、、。25．70%～39．90%2。。X523A0517－6611201119－11750－02ExperimentalStudyontheNaturalAttenuationofNitrateNitrogeninGroundwaterDUANLeietalSchoolofEnvironmentalScienceandEngineeringChang’anUniversityXi’anShaanxi710054AbstractObjectiveTheaimwastostudythenaturalattenuationofnitratenitrogeningroundwater．MethodTakingloesssiltyclayfinesandandsiltasmediumsinsimulatedaquifersealingimmersionexperimentwascarriedouttostudythenaturalattenuationprocessofni-tratenitrogeningroundwater．ResultBothchemicalreductionandbiologicaldenitrificationplayedimportantrolesinthedecreaseoftotalni-tratenitrogencontentespeciallychemicalreductionunderoriginalecologicalenvironmentwithoutanychemicalreagentthedecreasingrateoftotalnitratenitrogencontentwasonly25．70%－39．90%namelygroundwaterhadpoorself-purificationcapacityanditresultedtotheaccumulationofnitratenitrogenwhenchemicalreductionwasstrengthenedthedecreasingrateoftotalnitratenitrogencontentwasover2timesofthatunderoriginalecologicalenvironment．ConclusionThestudycouldprovidetheoreticalfoundationandtechnicalsupportforthecontrolofnitrogenpollutioningroundwater．KeywordsGroundwaterNitratenitrogenChemicalreductionDenitrificationNaturalattenuation1。2－4。。11．1、、pH7．65～8．1775．4～181．0μs/cm10．00～56．54g/kg。1．2、、200g400ml0．8g/L、15、10、15、3048d、。3①②10g③4g。22．114。1Table1Decreasingrateoftotalnitrateamountindifferentmediums%MediumAddedreagentsSoakingtime∥d510153048MeanLoess－39．9036．9038．9036．9038．3038．1883．2080．4685．5079．1087．4083．1334．2431．3033．9035．3034．9033．93Silt－39．7037．8036．0035．3038．8037．5283．2080．3085．8083．3092．4085．0034．2431．1031．7034．2035．5033．35Siltyclay－37．2037．2038．7036．3035．7037．02Finesand－29．5026．3033．1027．0025．7028．32、。2009ZX07012-002CHD2010JC029。1978－、[e-mail]。2011-03-31、、56．54、47．08、29．4410．00g/kg38．18%、37．52%、37．02%28．32%1。JournalofAnhuiAgri．Sci．2011391911750－11751DOI:10.13989/j.cnki.0517-6611.2011.19.077。2．2。。。、33．93%33．35%1。88．87%11．13%88．89%11．11%。6。2．3、、。、5。、。140．00%83．13%85．00%2．182．26。。、9。Fe2+NO3－NO3－NH4+、N2ON27。。325．70%～39．90%60．00%～75．00%2。1WOLFEAHPATZJA．Reactivenitrogenandhumanhealthacuteandlong-termimplicationsJ．Ambio2002312120－125．2VORLOPKDTACKET．ErsteschritteaufdemWegzuredelmetall-katal-ysiertennitrat-andnitrit-EntfernungausTrinkwasserJ．ChemIngTech198961836－845．3RUANGCHAINIKOMCLIAOBCHANOTAIJetal．Characteristicsofnitratereductionbyzero-valentironpowderintherecirculatedandCO2-bubbledsystemJ．WaterResearch200640195－204．4．NO3－J．200532225－30．5．J．2008242286－290．6．J．199221－6．7CHENGSFHUANGCYLIUJY．Studyofdifferentmethodsforenhan-cingthenitrateremovalefficiencyofazero-valentmetalprocessJ．WaterSciTechnol200653181－87．8．J．2010314107．9．J．2008S2349－352．10．J．2009S2278－280．11．J．20102檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪189－193．1174717FOURESTEVOLESKYB．AlginatePropertiesandHeavyMetalBiosorp-tionbyMarineAlgaeJ．AppliedBiochemistryandBiotechnology1997673215－226.18SCHIEWERSVOLESKYB．ModelingoftheProton-MetalIonExchangeinBiosorptionJ．EnvironSciTechnol199529123049－3058.19WANGKHWOODMJ．BioaccumulationofnickelbyalgaeJ．Envi-ronSciTechnol1984182106－109.20MAJIDIVLAUDEDAJRHOLCOMBEJA．Investigationofthemetal-algaebindingsitewithcadmium-113nuclearmagneticresonanceJ．En-vironSciTechnol19902491309－1312.21．J．200231315－17.22．J．200513413－20.157113919