韶关市大气颗粒物地球化学特征与源解析研究

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1、中南大学博士学位论文韶关市大气颗粒物地球化学特征与源解析研究姓名：罗莹华申请学位级别：博士专业：矿产普查与勘探指导教师：戴塔根20060301分析和比较各采样点的解析结果表明，各排放源类对受体贡献的空问分布特征为：除了居民区在夏、秋季扬尘贡献值增大，休闲区在夏、秋季汽车尾气尘贡献值增大外，其余各功能区均表现出明显的区域特征，即：交通区以汽车尾气尘的污染最为严重，其贡献值最大；工业区则以冶金尘和煤烟尘的贡献值最大；商业区以煤烟尘贡献值最大；居民区以建筑水泥尘贡献最大；休闲区以扬尘贡献最大。另外，风度广场夏

2、季以煤烟尘贡献最大，冬季则以汽车尾气尘贡献最大，其余的各源类贡献值大小依次排列为：扬尘>冶金尘>建筑水泥尘。关键词：颗粒物，城市大气环境，地球化学特征，受体模型，源解析IIAbstractTofindoutthedensity,chemicalcomposition．mineralcompositionandthechemicalformdistributionofheavymetalelementofatmosphericparticlesindifferentfunctiondistrict，ins

3、pring，summer,autumninShao—Guancity,AndclassifiedstudytheprobablecontribUtionsource．Accordingtotheresultofsourceanalysis，determinesthesourceofatmosphericparticlesandtheenvironmentalcontributionofeachsource．Tosettleoverall，synthesized，reasonablebasementfor

4、settingdownthecountermeasureandmeasureofpreventionandcureairpollutioninShao—Guancity．Thepaperappliesthebasicprincipleandmethodofgeochemistryandmineralogy,adoptsmodemanalysistechnicalmeanssuchasICPandⅪ强、GC—MS、XRD、SEMtostudygeochemicalcharacteristicsofatmo

5、sphericparticlesOverall．AndappliesCM旧toresolveoriginofatmosphericparticlesinShao．Guancity．ResearchshowsthattheairpollutioniSmainlythefinegrain(D。<10um)inShao—Guancity．ThemaincompositionelementsinparticlesareSi，S，Ca，-Fe，AL，K，Na，Pb，ZnandMg．Thetotalconcentr

6、ationofthe10mainkindselementaccountsforthe90％ofthe23kindselementconcentration．The7kindselementsofCu，CrNa，Sn，Se，PbandSarethepollutionelementinShao．Guancity．Theyexisti11PM2．5mainly．Thecontentoforganicmatterhasconsistencywiththeconcentrationofatmosphericpar

7、ticlesinShao—Guancity．Whereparticleshavehi吐concentrationhashighorganiccontent．Itimpliesthattheorganicpollutionsourceineachfunctiondistricthasunity．Thecontentof3kindsorganicmatter(FLU，BaA、BkF)arehighest．劢PstudyshowsthatBaA、PYR、BaParerepresentativematterin

8、atmosphericparticles．whichmeansthatthepollutionsourcecomefromthecombustionofhi吐temperature．ThemicroscopicfiguresofatmosphericparticlesCanbedividedinto6types：chain—likeaggregates，cluster-likeaggregates，ballshapeparticle，irr