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-Zeo-str。SEM/EDSXRD、BCR。Zeo-str10%Zeo-str28d83%8.72.5。Zeo-str。X71A1672-2043201611-2101-06doi:10.11654/jaes.2016-0760-112111*11.2000922.201612StabilizationofPbincontaminatedsoilusingzeolite-struvitecompositesZHANGZhi-hao1,CHENJie1,2,XIAPeng1,WANGHao1,WANGXue-jiang1*,ZHAOJian-fu11.StateKeyLaboratoryofPollutionControlandResourceReuse,SchoolofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai200092,China;2.ShanghaiHydraulicEngineeringGroupCompanyLimited,Shanghai201612,ChinaAbstractAzeolite-struvitecompositesZeo-strmaterialwasrecoveredinsimulatedwastewaterandappliedtostabilizePbinsoil.Thesta－bilizationeffectofitwasexploredbySEM/EDSandXRDcharacterization,extractionoftheavailableheavymetal,modifiedBCRsequentialextractionprocedures,enzymaticactivityanalysis,etc.TheresultsshowedthatZeo-strmaterialmostlywasthestruviteloadedammoniumsaturatedzeoliteanditperformedbetterabilityofstabilizingPbthanzeolite.AfterapplyingZeo-strmaterialintoPbcontaminatedsoilatthedosageof10%in28days,thefractionofexchangeablePbdecreased83%whilereduciblePbandresidualPbfractionsincreased8.7and2.5timesrespectively,andsucroseenzymeactivityincreasedwhilecatalaseactivitydecreasedduetothestabilizationofPbinsoil.Incon－clusion,PbinsoilcanbestabilizedbyZeo-strmaterial,thusachievingresourceutilizationofwaste.Keywordsstruvite;artificialzeolite;heavymetal;soil;stabilization2016－06－0341571301516784212014DFA916501992—。E-mail15zhangzh@tongji.edu.cn*E-mailwangxj@tongji.edu.cn20163511:2101-2106201611JournalofAgro-EnvironmentScience,.-[J].,2016,35112101-2106.ZHANGZhi-hao,CHENJie,XIAPeng,etal.StabilizationofPbincontaminatedsoilusingzeolite-struvitecomposites[J].JournalofAgro-EnvironmentScience,2016,3511:2101-2106.。、、[1]。[2]。MgNH4PO4·6H2O、、[3]。3511[4]。-Zeo-str[5]。12[6][7]3[8-9]。。11.160~80、MgCl2、KH2PO4、NH4Cl[PbNO32]。0~20cm2mm。GB15618—1995PbNO3240%4。1。92.5∶10.1mol·L-1HNO3NaOHpH2.0、3.0、4.0、5.0、6.0、7.0、8.0、9.010.02h、24h48hpH2pH2.02、3.12、4.08、5.13、6.12、7.06、8.14、9.06、10.14pH。、1∶102.0mol·L-1MgCl2150r·min-112h[5]。1.0L300mgN·L-160mgP·L-1pH9.010g150r·min-110hZeo-npZeo-str。1.21.2.1Zeo-strSEM/EDSUltra55ZeissGermanyXRDX’pertProXBrukerGermany。Zeo-npZeo-str0.2g100mL1.5mol·L-1KCl、CaCl2NaF150r·min-112h3。1.2.2100g40%。11.0%、2.0%、5.0%、10%、15%20%/Zeo-str42d3。2Zeo-str10%7d、10%CK。3pHZeo-str10%28d。1.30.25mol·L-1MgCl20.25mol·L-1HAc20∶1[10]ICP720-ESAgilentUS。BCRMossop[11]2。ICP。1Table1PhysicalandchemicalpropertiesofthetestedsoilpH1∶2.5g·mL-1。pH/g·kg-1/mg·kg-1/mg·kg-18.252.0815.515.67.541.8211.970621023212016112θ/°1020304050Zeo-str2Zeo-strXRDFigure2XRDpatternsofzeoliteandZeo-strmaterial35-[12]。22.11Zeo-strSEM/EDS。1a1bZeo-strEDS、2XRDZeo-str。。Zeo-str。[13]KClCaCl2NaFNaF。3Zeo-npZeo-str。Zeo-npKClNH+488%Zeo-str70%。Zeo-strNH+4KClZeo-strCaCl2HPO2-48.2%NaFHPO2-412%。Zeo-strHPO2-488%8.2%。Zeo-str。2.2。3Zeo-str。Zeo-str10%10%。10%Zeo-str2Table2Sequentialextractionprocedures10.11mol·L-1HAc20.50mol·L-1NH2OH·HClpH=1.53H2O2+1.0mol·L-1NH4OAcpH=2.041Zeo－strSEMFigure1SEMimagesofzeoliteandZeo－strmaterialbaEDSaNNDO49．50％Na11．89％Mg0．55％Al12．46％Si25．60％PNDEDSbN18．70％O46．02Na1．54Mg6．39％Al7．90％Si13．52％P5．93％aSEMbZeo－strSEMaSEMimageofzeolite;bSEMimageofZeo－strmaterial-21033511120100806040200/%/d071421283542CK75%10%32%。Zeo-str。NH+4HPO2-4。410%Zeo-str42dXRD。Zeo-strHPO2-4Pb10PO46OH2Pb5PO43OH2。HPO2-4Zeo-str。Cao[14]Pb5PO43FMignardi[15]Pb5PO43ClWright[16]Pb5PO43OH。。[17]。BCR、、。[11]。510%Zeo-str42d。CKZeo-str42dCK83%8.02.2;28dCK83%8.72.5。Zeo-str。2.3[18]。610%700600500400300200100/mg·kg-1/%05101520Zeo-str3Zeo-npZeo-strTable3ThecharacteristicofdesorptionofZeo-npandZeo-strmaterialHPO2-4/%NH+4/%Zeo-npCaCl238±1NaF92±2KCl88±2Zeo-strCaCl28.2±0.9NaF12±2KCl70±33Zeo-strFigure3ChangesofavailablePbconcentrationwithdifferentdosageofzeoliteandZeo-strmaterial5Zeo-strFigure5DynamicchangesofPbformsinsoilafteradditionofZeo-strmaterialIntensity2θ/°102030405060SiO2Pb10PO46OH2Zeo-strPb4Zeo-strXRDFigure4XRDpatternsofthetestedsoilbeforeandafterstabilizationbyZeo-strmaterial2104321201611120100806040200/%pH2.023.124.085.136.127.068.149.0610.14Zeo-str。Zeo-str28dCK17%11%。Pb[19]。Zeo-str。Zeo-str。2.4pH7pH。Zeo-strpHpH=2~4pH=9~10。[20]pHPbPb。。Zeo-strPb。。31Zeo-strSEM/EDS、XRD。2Zeo-str。XRDZeo-strPb10PO46OH2。3Zeo-str。4Zeo-str。。[1]BolanN,KunhikrishnanA,ThangarajanR,etal.RemediationofheavymetalloidscontaminatedsoilsTomobilizeortoimmobilize?[J].Jour－nalofHazardousMaterials,2014,2664141-166.[2]JinHP,BolanN,MegharajM,etal.Comparativevalueofphosphatesourcesontheimmobilizationoflead,andleachingofleadandphospho－rusinleadcontaminatedsoils[J].ScienceoftheTotalEnvironment,2011,4094853-860.[3]RahmanMM,LiuYH,KwagJH,etal.Recoveryofstruvitefromani－malwastewateranditsnutrientleachinglossinsoil[J].JournalofHaz－ardousMaterials,2011,1862/32026-2030.[4]WangH,WangXJ,WangWS,etal.Modelingandoptimizationofstru－viterecoveryfromwastewaterandreusingforheavymetalsimmobiliza－tionincontaminatedsoil[J].JournalofChemicalTechnology&Biotech－nology,2016243-246.[5]HuangH,XiaoD,RuiP,etal.Simultaneousremovalofnutrientsfromsimulatedswinewastewaterbyadsorptionofmodifiedzeolitecombinedwithstruvitecr