底泥再悬浮状态下生物有效磷形成机制研究

1,2,2,1(1.,150090;2.,215011):,(BAP),.,.,(BD2P),(Al2P),(Ca2P),(NH4Cl2P).,BAP6159%,BAP.(AAP)BD2P,AAP,BD2P3314%,BD2P1918%,BD2PAAP;NaHCO3(Olsen2P)BD2PAl2PNaOH2nrP,,Olsen2PBD2P.:;;;;:X13112:A:025023301(2008)0721824207:2007207215;:2007209214:(863)(2003AA601070);(ZD061202):(1975),,,,E2mail:[e-mail]ioavailablePhosphorusinSedimentsUndertheConditionsofSedimentRe2suspensionLIDa2peng1,2,HUANGYong2,LIWei2guang1(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.DepartmentofEnvironmentalScienceandEngineering,UniversityofScienceandTechnologyofSuzhou,Suzhou215011,China)Abstract:TheconcentrationsofdifferentsedimentaryphosphorusformsandbioavailablephosphoruswerestudiedandtheformationmechanismofBAPinsedimentswasdiscussed,undertheconditionsofsedimentsre2suspension.Theresultsshowthatsedimentre2suspensionhadobviouseffectonthedistributionofdifferentsedimentaryphosphorusforms.TheBD2P,Al2P,Ca2PwereincreasedevidentlyandtheNH4Cl2Pwasdecreasedwiththetimeofsedimentre2suspensionextending.TheBAPinsedimentsafterre2suspendedwasreducedby6159%,indicatingthatsedimentre2suspensioncouldpromotethetransformationfromBAPtononbioavailablephosphorus.TheformationofAAPmightmainlyhavecloserelationshipswithBD2P.AfterextractingAAP,theBD2Pwasdecreasedby3314%averagelyinthesedimentsafterre2suspended,whilethereleaseofBD2Pinsedimentsfromthecontrolexperimentwasincreasedby1918%,showingthattheformationofAAPwasaffectedmarkedbythepropertiesofBD2P.TheOlsen2PcouldbemainlyformedfromBD2P,Al2P,NaOH2nrP.TheformationofOlsen2PwascloselycorrelatedtoBD2P,basedonthereleaseofBD2P,Al2P,NaOH2nrP.Keywords:phosphorusforms;bioavailablephosphorus;formationmechanism;transformation;sedimentre2suspension,,[14].,.,(BAP)[58].,BAP,,BAP.,,,,[9,10].,[11],,.,[1214].,,(FeoxAlox),[1517],(SRP),,.,.:[1820].,,BAP.,,,,.29720087ENVIRONMENTALSCIENCEVol.29,No.7Jul.,20081111,15cm.,(4),,.pH.1.1Table1Physics2chemicalcharacteristicsofsedimentspHTPPmgkg-1P%P%616216251336916213123112185L,31,E0E1E2E3E4E5.200g,215L,.E1E2E3E4E5(60rmin-1,10mind-1),.E0,,.0d,E1E2E3E4E51d3d10d20d30d.SRPSRP.113,E0E1E2E3E4E5,ES0ES1ES2ES3ES4ES5.ESR.,,100.BAP.3.5%.0150g3()500mL,(AAP),.1150g3()100mL,(Olsen2P),.(BAP)23.2[6,7]Table2ExtractionmethodofbioavailablephosphorusinsedimentsWSP0150g100mL,25220rmin-12h,10000rmin-110min,0145m,RDP1100g50mL0101molL-1CaCl2,25220rmin-11h,10000rmin-110min,0145m,AAP0150g200mL011molL-1NaOH,25220rmin-14h,10000rmin-110min,0145m,Olsen2P1150g50mL015molL-1NaHCO3,pH=815,25220rmin-1015h,10000rmin-110min,0145m,3[19,21]Table3Speciesofphosphorusinsedimentsandsequentialextractionmethods(NH4Cl2P)1molL-1NH4Cl(pH=7),212h,,,(BD2P)0111molL-1Na2S2O4PNaHCO3,1h,,,(Al2P)011molL-1NaOH,16h,,,(NaOH2nrP),NaOH2TP,NaOH2nrP=(NaOH2TP)-(Al2P)(Ca2P)015molL-1HCl,16h,,,(Res2P)5505h,1molL-1HCl,16h,,,.10512h,550215h.2211(1).1,1d,SRP,,SRP0122mgL-101022mgL-101104mgL-1.,SRP01020mgL-101067mgL-1.SRP,,,52817:(FeoxAlox),[16,17].,.,[22].1Fig.1VariationoftheSRPintheoverlyingwater2124,TP.ES1ES2TPESR,,,,SRP.,.SRP,TP.ES3ES4ES5,TPESR,SRP.4,5TPES0TP,.1,:,,;,,[7,17],.[2325],Gassmann[26][27],,,,.4Pmgkg-1Table4PhosphorusformsinsedimentsPmgkg-1TPNH4Cl2PBD2PAl2PNaOH2nrPCa2PRes2PESR162513313718983717212014987151306199134173ES0173614912310492317114715873159308113160144ES115611799810376810613019589147318123157104ES21599135102168789125131120111179315161148183ES317031448310293117713612573117330159148164ES41699180108159870169136129103164330180149178ES51714120921787914515018979176347107164133,.,BD2PTP,7,51150%.,BD2P,Feox[28,29].ES1ES2BD2PESR,,DO,BD2P.,DO,Feox,Feox,FeoxBD2P,BD2P.BD2P[18].,Al2PCa2P,Al2PCa2P,Al2PAlox[30],Ca2P[31].ESRES0,5,NH4Cl2P,NH4Cl2P.2135,,BAP.,WSPRDP,AAPOlsen2P.7,4BAPTP,AAPOlsen2PRDPWSP.AAP,13103%;Olsen2P,4199%;WSPRDP1114%0106%.WSPRDP,.(AAP),6281295Table5EffectontheBAPinthesedimentsafterre2suspendedBAPWSPRDPAAPOlsen2PPmgkg-1P%Pmgkg-1P%Pmgkg-1P%Pmgkg-1P%Pmgkg-1P%ESR388193231931711011050150010328610017160851335125ES0415151231931510901870175010430410017151951675150ES1265191171031410801901100010617210011101781835105ES2255158151981319901881125010816410010125761334177ES327111115192221121130115001091661009174811504178ES4341122201072517211511150010923010013153841004194ES5303154171712418711451100010619810011155791674165[32].5,AAPPTP11121%,ESRES0,AAP6139%613%,AAP.ES0AAP,BD2P.,ES1ES5AAP,BD2P.ES0ES3,BD2P,ES0AAPES31.Feox[33].ES3,BD2PFeox;ES0,BD2P,BD2P,AAP1015molL-1NaHCO3Olsen2P[32].ESR,(ES1ES5),Olsen2PPCa2P3140%,ES0Olsen2PPCa2P3125%.,Olsen2P.,,,.5,,BAP,ESR,ES1ES5BAP619%7195%8101%3186%6122%,BAP;,BAP,26158mgkg-1,BAP.,,BAP;,BAP,.3,BAPTP.,BAPTP(PAP)(6).6,BAPWSPOlsen2PTP,RDPAAPTP.,BAP,AAPOlsen2P.[7,34]:AAPBD2PCa2P,Olsen2PCa2P,6TPPAPBAPTable6CorrelationofTP,PAP,variousphosphorusfractionsandBAPinthesedimentsafterre2suspendedWSPRDPAAPOlsen2PNH4Cl2PBD2PAl2PNaOH2nrPCa2PRes2PPAPTPWSP1RDP013871AAP01748012301Olsen2P0180701607017381NH4Cl2P-01109010201545010431BD2P01827015730127701209-015511Al2P01710-012850139701211-01304015371NaOH2nrP-013680111701189-0125401891-01244-015031Ca2P01857-010770150401