纳米铁降解有机物

JournalofHazardousMaterials243(2012)73–79ContentslistsavailableatSciVerseScienceDirectJournalofHazardousMaterialsjournalhomepage:www.elsevier.com/locate/jhazmatImpactofsizeandsorptionondegradationoftrichloroethyleneandpolychlorinatedbiphenylsbynano-scalezerovalentironElijahJ.Petersena,RogerA.Pintob,XiangyangShic,d,QingguoHuange,∗aMaterialMeasurementLaboratory,NationalInstituteofStandardsandTechnology,Gaithersburg,MD20899,UnitedStatesbDepartmentofChemicalEngineering,UniversityofMichigan,AnnArbor,UnitedStatescStateKeyLaboratoryforModificationofChemicalFibersandPolymerMaterials,DonghuaUniversity,Shanghai201620,People’sRepublicofChinadCollegeofChemistry,ChemicalEngineeringandBiotechnology,DonghuaUniversity,Shanghai201620,People’sRepublicofChinaeDepartmentofCropandSoilSciences,UniversityofGeorgia,Griffin,GA30223,UnitedStateshighlights�nZVIsweresynthesizedusingalayer-by-layerorpoly(acrylicacid)stabilizationapproach.�ThesenZVIswereusedtodegradeTCEandPCB.�nZVIcoatingsimpactedreactivitybyalteringpollutants/particleinteractions.�SmallernZVIparticlesizeledtogreaterreactivity.articleinfoArticlehistory:Received13August2012Receivedinrevisedform24September2012Accepted28September2012Availableonline6October2012Keywords:PolyacrylicacidNano-ironRemediationPermeablereactivebarriersnZVIabstractNano-scalezerovalentiron(nZVI)hasbeenstudiedinrecentyearsforenvironmentalremediationappli-cationssuchasthedegradationofchlorinatedorganiccontaminants.ToovercomelimitationsrelatedtothetransportofnZVI,itisbecomingcommontoaddapolymerstabilizertolimitaggregationandenhancetheparticlereactivity.Anothermethodinvestigatedtoenhanceparticlereactivityhasbeentolimitparticlesizethroughnovelsynthesistechniques.However,therelativeimpactsofparticlesizeandinteractionsofthechemicalswiththecoatingsarenotyetwellunderstood.Thepurposeofthisstudywastoinvestigatethemechanismsofparticlesizeandpolymercoatingorpolyelectrolytemultilayer(PEM)synthesisconditionsondegradationoftwocommonchlorinatedcontaminants:trichloroethylene(