南京市PM_10时空变化特征及微观形貌分析-豆柴文库

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南京市PM_10时空变化特征及微观形貌分析
南京市PM10时空变化特征及微观形貌分析
Abstract：
BasedonPM10monitoringdatafrom4representativestationsinNanjingcityfromJanuarytoDecember2019,thespatialandtemporalcharacteristicsandmicroscopicmorphologyofPM10wereanalyzed.TheresultsshowedthatthePM10concentrationwashigherinwinterandspringthaninsummerandautumn.ThespatialdistributionofPM10wasnotuniform,andtheAQIvaluesinindustrialandurbanareasweregenerallyhigher.ThemainsourceofPM10inNanjingisthecombustionoffossilfuels,includingindustrialwastegasemissions,vehicleexhaust,andcentralheating.TheshapeofPM10particleswasmainlysphericalandirregular,andthesizeoftheparticleswasmainlyconcentratedintherangeof0.4-1.0μm.
Introduction：
Withtherapiddevelopmentofindustrialization,urbanization,andtransportation,particulatematterpollutionhasbecomeaseriousenvironmentalproblem,whichhasattractedworldwideattention.Asaprimarypollutant,PM10hasasignificantimpactonhumanhealth,atmosphericvisibility,andclimatechange.Therefore,itisnecessarytoconductresearchonthespatialandtemporaldistributioncharacteristicsandmicroscopicmorphologyofPM10inNanjingCitytoformulateeffectivecontrolmeasures.
MaterialsandMethods：
ThePM10monitoringdatafrom4representativestationsinNanjingcitywerecollectedfromJanuarytoDecember2019,includingXinjiekoustation,PukouStation,XuanwuStation,andQixiaStation.ThespatialandtemporaldistributioncharacteristicsofPM10wereanalyzedbystatisticalmethods,andthemicroscopicmorphologyofPM10particleswasanalyzedbySEM(ScanningElectronMicroscopy).
Results：
TheaverageannualconcentrationofPM10inNanjingCitywas82.3μg/m³,indicatingamoderatelevelofpollution.ThePM10concentrationwashigherinwinterandspringthaninsummerandautumn,andthemaximumvalueappearedinJanuary,reaching148.1μg/m³.ThespatialdistributionofPM10wasnotuniform,andtheAQIvaluesinindustrialandurbanareasweregenerallyhigherthanthoseinsuburbanandruralareas.ThemainsourceofPM10inNanjingisthecombustionoffossilfuels,includingindustrialwastegasemissions,vehicleexhaust,andcentralheating.TheshapeofPM10particleswasm