同步辐射微聚焦x射线荧光分析易腐生活垃圾组分重金属污染特征

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1、同步辐射微聚焦X射线荧光分析易腐生活垃圾组分重金属污染特征CharacterizationofheavymetalsinthecontaminatedBFMSWusingsynchrotronradiation-inducedmicro-X-ray510152025303540fluorescenceZHANGHuaWUJunSHAOLimingHEPinjingCollegeofEnvironmentalScienceandEngineeringTongjiUniversityShanghai200092A

2、bstractHeavymetalpollutionofbiodegradablefractionofmunicipalsolidwasteBFMSWgreatlyhampereditsbeneficialreuseSynchrotronradiation-inducedmicro-X-rayfluorescenceSR-μXRFwasemployedtoelucidatetheelementalcharacteristicsofcontaminatedBFMSWSixsectionedBFMSWsamples

3、wereselectedforSR-μXRFmappingand50individualfineparticlessorbedontoBFMSWwereanalyzedusingSR-μXRFpointscanningTheresultsshowedthatheavymetalstendedtobeconcentratedonthesurfaceofBFMSWandhighlylocalizedtosomehot-spotsMarkeddifferencesinheavymetalsequesteringpot

4、entialsamongvariouskindsofBFMSWandthesignificantroleofheavymetalhot-spotsinBFMSWcontaminationwereidentifiedThelowerheavymetallevelsinthesimulatedsamplescomparedtofieldsampleswithlongerandmoreintensemixingindicatedthatinter-contaminationduringwastehandlingcon

5、tributedsignificantlytoheavymetalaccumulationinBFMSWFurthermoreadditionalinformationregardingelementalcharacteristicsofindividualparticlescouldbeacquiredusingSR-μXRFKeywordsbiodegradablefractionofmunicipalsolidwasteheavymetalsynchrotronradiation-inducedmicro

6、-X-rayfluorescenceindividualfineparticleelementalfingerprint0IntroductionThebeneficialutilizationagriculturaluseetcofthebiodegradablefractionofmunicipalsolidwasteBFMSWasanalternativetolandfilldisposalcouldsignificantlyalleviatetheenvironmentalburdenoforganic

7、pollutantsCompostingisacommonbiologicaltreatmentusedtodivertorganicwastematerialsintoagriculturalproductsatarelativelylowcost[12]Howeverthereuseofmechanically-sortedmunicipalsolidwasteMSWcompostisfrequentlylimitedbytheexcessofheavymetals[3-5]Amlingeretal[6]c

8、oncludedthatheavymetallevelsinmechanically-sortedMSWcompostweretypically2–10timeshigherthanthosefoundinsource-segregatedMSWcompostbecauseofinter-contaminationbetweenthevariouswastestreamsSuchcon