湖泊底泥磷释放及磷形态变化

97Vol．9No．720157ChineseJournalofEnvironmentalEngineeringJul．2015710055SMT、pH。3．96Al-PCa-PNH+4-P、Fe-POrgP、pH。X524A1673-9108201507-3350-05PhosphorusreleaseandphosphorusformchangeinlakesedimentsGaoXiangLiYanHeYiSchoolofEnvironmentalandMunicipalEngineeringXi’anUniversityofArchitectureandTechnologyXi’an710055ChinaAbstractInordertostudytheeffectofendogenousphosphorusreleaseinsedimentoneutrophicationofurbanlandscaperiverQujiangSouthLakeinXi’ancitywaschosenasthestudyobject．PhosphorusformswereanalyzedusingthestandardmeasurementandtestSMTprocedureandthecharacteristicsofphosphorusformschangewereexploredbysimulationexperimentunderdifferentenvironmentalconditionswhichwastemperaturepHanddissolvedoxygenDO．Theresultsindicatedthattherisingtemperaturepromotedphosphorusreleasesothateutrophicationwasseriousinsummer．Thealkalineconditionwasmuchmorepropitioustophosphorusre-leasewhileincreasingofwater-supplywasadverse．Thereleaseamountofphosphorusinanaerobicenvironmentwas3．96timeshigherthanthatinaerobicenvironment．TheAl-PandCa-Pweredissolvedquicklyunderacidicconditions．TheNH4-PFe-PandOrg-PweregreatlyinfluencedbyDOpHandtemperatureanditsadsorptionandreleasecapacityhadsignificantdifferences．Keywordssedimentphosphorusendogenesisreleasephosphorusformsenvironmentalfactors2014－05－192014－06－271964—。[e-mail]*[e-mail]1。2。3。。、pH。11．15km2。13．3℃558～750mm1088m20m。pH=7．89DO=8．35mg/LCOD=16．24mg/LTN=0．34mg/LTP=70.04mg/L4。3。1．220131161。0～5cm、100。666。1Fig．1Samplingsitesforsediment1．3DＲ5000PHS-3CpHAvantiJ-26XPJPB-607ASHA-C。1．41．4．10．25g3mL10。1．4．2SMT50．25g25mL1mol/LHCl16h10minIP450℃3h25mL1mol/LHCl16h10minOrg-P。1．4．30．5g50mL1mol/LNH4ClNH4Cl-P50mL1mol/LNH4FAl-P50mL1mol/LNaOH16h2C1/2H2SO42mol/LFe-PC1/2H2SO40.5mol/L20mLCa-P。1．5100g1000mL24h。2-。17、1830℃。2pH1mol/LHCl1mol/LNaOHpH5、79。3DO＞5mg/LDO＜1mg/L。1000mL130min。。22．1-、、-。2OrgP116．953mg/kgTP21．5%。IP2Fig．2DistributionofdifferentphosphorusformsinsedimentofQujiangLakeXi’an15339424．922mg/kgIPCa-PIP62%NH4Cl-P68．512mg/kgIP16%Fe-P、Al-PIP4．7%、3．8%。Ca-P＞OrgP＞NH4Cl-P＞Fe-P＞Al-P。2．23。7、1830℃0．04、0．070．11mg/L30℃7℃2．75。17、1830℃1．5%、2．7%7．6%。、OrgPFe-POrgP30℃OrgP11．7%Fe-P30℃9．3%。CO2Ca-PCa-P30℃1．5%。Al-PNH4Cl-P、。7．3～26．4℃。3Fig．3Variationprocessoftotalphosphorusconcentrationatdifferenttemperaturesinwater2．3pHpH=9＞pH=5＞pH=74。pH=5150．08mg/LpH=71．1pH=9170．11mg/LpH=71．5。1pH=5pH=94.3%8%pH。Fe-PAl-P1.0%0．6%H+Ca-PCO25．9%Al-P8．2%Al3+AlOH3HPO2－4H2PO4－。Fe-PAl-P11．5%10．9%OH－Fe3+Al3+OH－Fe3+Al3+Fe3+Al3+6。Ca-P4．2%OH－。OrgP6．7%7．1%NH4-POrgPFe-P。pH8．9。4pHFig．4VariationprocessoftotalphosphorusconcentrationatdifferentpHinwater2．45。DO＞5110．05mg/LDO＜1130．29mg/L253371Table1Variationofchemicalfractionproportionsofphosphorusinsedimentmg/kgTPNH4-PFe-PAl-PCa-POPmg/kg%mg/kg%mg/kg%mg/kg%mg/kg%mg/kg%543．55268．51219．84716．188264．600116．953T=7℃535．370－1．50569．036+0．76519．796－0．25616．201+0．080264．267－0．125115．581－1．173T=18℃528．876－2．70071．612+4．52419．245－3．02316．172－0．098263．800－0．302111．106－4．999T=30℃501．800－7．68174．809+9．19117．994－9．33616．093－0．586260．508－1．546103．191－11．767pH=5520．218－4．29870．587+3．02819．643－1．02716．086－0．630249．077－5．866109．063－6．746pH=7531．893－2．14670．1932．45320．3482．52417．5178．21269．932．014113．004－3．376pH=9499．672－8．07364．035－6．53417．569－11．47814．411－10．978275．8744．261108．613－7．131526．869－3．06973．882+7．83821．569+8．67616．104－0．519260．451－1．56897．288－16．814477．456－12．1671．975+5．05417．923－9．69415．899－1．785253．630－4．14595．813－18．0755．8。Eh6258～300mVEh－1002。1、3%12%。Al-PAl3+Ca-P4%CO2、OrgP16．8%OrgP18%。Fe-P。8．6%9．7%Fe2+Fe3+Fe7。Fe3+Fe2+FeOH3xFeOH2PO3－4Fe-P89。5Fig．5VariationprocessoftotalphosphorusconcentrationatdifferentDOinwater6Fig．6TimevariationofEh3。35339pH、NH4-P、Fe-POrgP、pHAl-PCa-PAl-P。、。1．pH．2009215663-668YuanHezhongShenJieLiuEnfengetal．CharacteristicofphosphorusreleasewiththecontrolofpHofsedimentsfromMeiliangBayLakeTaihu．JournalofLakeSciences2009215663-668inChinese2．．201379327-332HuPengYaoYimingHuZhitaoetal．Desorptioncharac-teristicofphosphorusfromacanalsedimentinsalineareasandinfluencingfactors．ChineseJournalofEnvironmentalEngineering201379327-332inChinese3LiQingmanZhangWenWangXingxiangetal．PhosphorusininterstitialwaterinducedbyredoxpotentialinsedimentofDianchiLakeChina．Pedosphere2007176739-7464．．2009LiXu．Ｒesearchonwaterqualityanalysisevaluationpre-dictionandcountermeasureforartificiallandscapewater．Xi’anMasterDissertationofXi’anUniversityofArchitec-tureandTechnology2009inChinese5ＲubanV．López-SánchezJ．F．PardoP．etal．Harmo-nizedprotocolandcertifiedreferencematerialforthedeter-minationofextractablecontentsofphosphorusinfreshwatersedimentsAsynthesisofrecentworks．Fresenius’JournalofAnalyticalChemistry20013702-3224-2286．pH．2007263873-877GuoZhiyongLiXiaochenWangChaoetal．InfluenceofpHvalueonthereleaseandthechemicalfractionsofphos-phorusinsedimentsofXuanwuLake．JournalofAgro-Envi-ronmentScience2007263873-877inChinese7．．2010302389-398HeJiangSunYingLüChangweietal．Ｒesearchonphos-phorusreleasefromthesurfacesedimentsintheDaihaiLake．ActaEcologicaSinica2010302389-398inChi-nese8．-．2010223430-436GongChunshengFanChengxin．Effect