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2011,30(12):2542-2547JournalofAgro-EnvironmentScience、。pH、、、4pH。。。。X524A1672-2043(2011)12-2542-06121*112喆2111．3000722．518055TheFactorsAffectingtheIntensityofLakeEndogenousNitrogenReleaseUndertheConditionsofDifferentTimeScalesWANGZheng1,2,ZHAOLin1*,LIXin1,MAKai1,HUANGXiu-lan2,FENGZhe2,CHENLu1LIUjin11.SchoolofEnvironmentalScienceandEngineering,TianjinUniversity,Tianjin300072,China;2.KeyLaboratoryforEnvironmentalandUr－banSciences,ShenzhenGraduateSchool,PekingUniversity,Shenzhen518055,ChinaAbstractEndogenousreleaseofnitrogenandphosphoruscouldcontinuouslypollutelakesafteroutsidepollutionsarecontrolled.Todeter－minethefactorsaffectingendogenousrelease,thisstudyanalyzedthemechanismofendogenousreleaseofnitrogenandfoundthatthepH,temperature,dissolvedoxygen,andhydrodynamicconditionwerethemainfactorsaffectingthereleaseprocess.Afterthen,weestablishedalogarithmmodeltodeterminethereleaseintensityofammoniumandnitratenitrogenbyconsideringthesemainfactors.Afterverification,re－sultsshowedthatammoniumwasthemainsubstanceofnitrogentorelease,itsreleasedensitywaspositivelyrelatedtotemperatureandnega－tivelyrelatedtopHandaerationstatus.Itwasfoundthat,insmall-scaleshallowlakes,hydrodynamicconditioncouldaffectendogenousre－leaseofnitrogensignificantlyinshortperiod,butthiswasnotworkinlongperiod.Theinfluenceofaerationstatusontheintensityofendoge－nousnitrogenreleaseinlongperiodwasmoresignificantthanthatinshortperiod.Ourresultscouldprovidehelpfulinformationfortheprac－ticesofendogenousreleaseestimationandfortheimprovementofengineeringapproachtoreducethereleaseintensity.Keywordseutrophication;nitrogen;endogenousrelease;timescale2011－04－202008-20101988—。E-mailwangzheng.pku@hotmail.com*E-mailzhaolin@tju.edu.cn、、。、[1]80%90%[2]。[3-4]、。、3a[5]。。10∶1[6]。3012[7-9]。。、、pH、[110-18]。、[919]。[16]。[17-18]。。。11.14--。-G=A·c·10BpHA、BcpH。。[20]。FickJ=-Dgradc=-DdcdxD=D0e-Q/kT。v＝kcaAVbB＝AeE0RTcaAVbBNH+4+32O2→NO-2+2H++H2ONO-2+12O2→NO-3。、。、。-。1。4pH、、。R=s·DO·10lpH+mT+nk乙dcdx1Rmg·kg-1DOmg·L-1T℃KW·m-3dcdxmol·L-1·m-1ts、l、m、n。s。lnR=lns+lnDO+lpH+mT+nK21.2117.1670°E39.1110°N。5hm215m3。2009。201034.4m6.4℃。10cm-5~10cm[7]1Table1ReactiontofactorsindifferentprocessesofendogenousreleasepH——————————2543201112。1.315、20、35℃3。2pH1mol·L-1HCl1mol·L-1NaOHpH6.0、7.0、8.0、9.04。33.5mg·L-1、5.0mg·L-1、6.5mg·L-1。430、0.86、2.14W·m-3、。1.4201000mL50.0g1000mL。pH。3d40mL0.45μm。15d。、《》[21]、。1.5R3=Vc3/m3R15=[Vc15+V3c3]/m4R33dmg·kg-1R1515dmg·kg-1VL;c33dmg·L-1c1515dmg·L-1mkgV33dL。AS、AL3d、15dNS、NL3d、15dTS、TL3d、15d。22。2STATA0.05tlnAS=-0.0663pH+0.0114T-0.2247lnDO+0.1326K+3.2494R2=0.9118lnNS=-0.0834pH+0.0123T-0.1039lnDO+0.1742K+1.5731R2=0.8342lnTS=-0.0683pH+0.0115T-0.2263lnDO+0.1384K+3.4193R2=0.9354lnAL=-0.0573pH+0.0116T-0.5884lnDO+3.8406R2=0.8501lnNL=-0.1508pH+0.0103T+0.2890lnDO+1.6618R2=0.8457lnTL=-0.0703pH+0.0115T-0.4386lnDO+3.9084R2=0.85151AS、TS[22]。lnAS=-0.0535pH+0.0128T-0.2039lnDO+0.1223K+3.0912R2=0.9333lnNS=-0.0834pH+0.0123T-0.1039lnDO+0.1742K+1.5731R2=0.8342lnTS=-0.0570pH+0.0128T-0.2079lnDO+0.1292K+3.2789R2=0.9521lnAL=-0.0573pH+0.0116T-0.5884lnDO+3.8406R2=0.8501lnNL=-0.1508pH+0.0103T+0.2890lnDO+1.6618R2=0.8457lnTL=-0.0703pH+0.0115T-0.4386lnDO+3.9084R2=0.85150.05F。33.1pH、、36315d33d。、。3d[14-15]4254430122Table2ResultsofnitrogenreleasesimulationpHT/℃DO/mg·L-1K/W·m-3/mg·kg-1/mg·kg-1/mg·kg-1ASALNSNLTSTL1653.50.8617.3417.682.783.0520.1220.7326203.50.8619.5922.033.053.5622.6425.5936203.5015.0216.972.513.3517.5320.3246355018.1319.153.844.4121.9723.565755011.5813.042.073.2313.6516.2767206.5013.9213.892.293.9216.2317.8177203.5015.4118.262.423.4417.9721.7087205014.6716.222.373.9017.1620.1297353.52.1423.0822.864.104.4927.2027.35107356.52.1420.8517.233.924.7724.8322.00117355015.9114.822.713.9718.6218.7912853.5012.1013.941.732.7813.8316.7213856.5010.079.981.592.8411.5712.82148203.50.8616.3519.113.422.9119.7722.02158203.5012.7318.442.612.8715.3421.31168353.52.1422.9520.893.943.2426.8924.1317953.50.8611.7913.652.471.9314.2615.58189206.5012.2211.131.752.7213.5713.85199203.5014.8717.582.012.0116.9219.59209353.5016.8020.672.632.8319.4323.50。BlomG、Reddy、、[1141623]。15d[17-18]。-。[18]。[17]。。2~6[16]。1/10[15]。3.2pHpH。H+H+pHOH-。pH=6.5~7.5pH8[24]。4pHpH。15d。。DO5.0mg·L-1[12-13]。3d25452011120.025t。。3d。33。、15d3d。。、。、[10-1125]。290%。。4。1、。。2pH、。。3。[1]BlomG,WinkelsHJ.ModelingsedimentaccumulationanddispersionofcontaminantsinLakeLjsselmeertheNetherlands[J].WatSciTech,1998,376-717-24.[2],,.[J].,2003,4256-64.ZHANGLi-ping,YUANWen-quan,ZHANGXi-hui.Kineticsofpollu－tantsreleasefromsediments[J].TechniquesandEquipmentforEnvi－ronmentalPollutionControl,2003,4256-64.[3],,.[M].,200187-89.JINXiang-can,SHANGYu-min,XUNan-ni.Lakeeutrophicationcon－trolandmanagerialtechnique[M].BeijingChemicalIndustryPress,200187-89.[4],.[J].D,2003,336576-582.[5]BootsmaMC,BarendregtA,vanAlphenJC.EffectivenessofreducingexternalnutrientloadenteringaeutrophicatedshallowlakeecosystemintheNaardermeernaturereserve,TheNetherlands[J].BiologicalConservation,1999,905193-201.[6],,.[J]．,2006,272263-267.QULi-mei,YAODe,CONGPi-fu.Inorganicnitrogenandphosphateandpotentialeutrophicationa