预览加载中，请您耐心等待几秒...

淄博市城区大气PM_(2.5)中多环芳烃污染特征及来源分析.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

淄博市城区大气PM_(2.5)中多环芳烃污染特征及来源分析 Introduction PM2.5pollutionhasbeenasignificantenvironmentalconcernformanyareasinChina,includinginZibocity,Shandongprovince.MultiplestudieshaveinvestigatedthesourcesandcharacteristicsofPM2.5inZibocity,whichhasanimportantimpactonpublichealthandtheenvironment.Thispaperwillanalyzethepollutioncharacteristicsandsourcesofpolycyclicaromatichydrocarbons(PAHs)inPM2.5inZibo'surbanarea. PM2.5andPAHs PM2.5referstofineparticulatematterwithadiameteroflessthan2.5micrometers,whichcanpenetratedeepintothelungsandcauseseriousrespiratoryandcardiovasculardiseases.PAHsareagroupoforganiccompoundswithtwoormorefusedbenzenerings,whicharegeneratedfromincompletecombustionoforganicmatter,suchascoal,oil,andbiomass.PAHsareoneofthemosttoxicpollutants,whichcancausecancer,mutagenicandreproductiveeffects,anddamagehumanhealth. Pollutioncharacteristics Accordingtostatisticaldata,theannualaverageconcentrationofPM2.5inZibo'surbanareawas70.2μg/m3,exceedingthenationalstandard(35μg/m3)by2times.ThespatialdistributionofPM2.5concentrationshowedthatthehighestvaluewasfoundinthesouthernandeasternregions,whichweretheindustrialareaswithalargenumberoffactoriesandpowerplants.Meanwhile,theseasonalvariationofPM2.5showedthatthehighestconcentrationwasinwinter,followedbyautumn,springandsummer,indicatingthatcoalcombustionwasasignificantsourceofPM2.5pollution. PAHsconcentrationshowedthatthetotalconcentrationof16PAHsinPM2.5rangedfrom13.5ng/m3to443.7ng/m3,withanaverageof139.8ng/m3.ThehighestconcentrationwasobservedinMarch,mainlyattributedtotheinfluenceofcoalcombustionandvehicleemissionduringwinter.ThediagnosticratiosofPAHsindicatedthatthemajorsourceofPAHsinPM2.5wascoalcombustion,whichaccountedfor73.4%ofthetotalPAHs.OthersourcesofPAHsincludedvehicleemission,biomassandwasteincineration,andindustrialprocesses. Sourceanalysis CoalcombustionwastheprimarycontributortoPM2.5andPAHspollutioninZibo'surbanarea.ThesignificantsourceofPM2.5wasfromcoal-firedpowerplants,thermalpowerplants,industrialboilers,andhou