| 大气颗粒物的微观特征研究 |
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| 引用本文： | 杨文敏,吴炳耀.大气颗粒物的微观特征研究[J].中华预防医学杂志,1996,30(5):292-295. |
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| 作者姓名： | 杨文敏 吴炳耀 |
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| 作者单位： | 山西医学院环境卫生教研室，美国Ａｌｂａｎｙ医学院 |
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| 摘 要： | 为了研究大气污染中颗粒物的组分，运用扫描电镜和Ｘ射线能谱分析技术，分析太原市６个监测点７７６个颗粒物表面１５种元素分布及形态特征。结果显示：Ｓｉ、Ａｌ元素含量丰富，平均为４９．４％和２５％，表明Ｓｉ和Ａｌ是大气颗粒物的主体成分；Ｓｉ、Ａｌ、Ｋ等亲石元素在颗粒物表面的含量随着粒径减小，相对减少，而Ｖ、Ｃｒ、Ｍｎ、Ｎｉ、Ｃｕ、Ｚｎ、Ｐｂ等亲气性元素的含量随着粒径减小逐渐增多；Ｓｉ和Ａｌ元素不仅含量高而且检出频率高，分别为９６．５％和８９％，提示大气气溶胶中硅铝酸盐颗粒占主导地位；不同尘源颗粒物具有不同的形态特征及元素分布。
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| 关 键 词： | 空气污染物 元素 |
StudiesonMicroscopicCharacteristicsofAtmosphericParticles |
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| YangWenmin,WuBingyao,ChristineShehen.StudiesonMicroscopicCharacteristicsofAtmosphericParticles[J].Chinese Journal of Preventive Medicine,1996,30(5):292-295. |
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| Authors: | YangWenmin WuBingyao ChristineShehen |
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| Institution: | YangWenmin,WuBingyao,ChristineShehen.DepartmentofEnvironmentalHealth,ShanxiMedicalColege,Taiyuan030001 |
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| Abstract: | Distributionof15elementsonthesurfaceofandmorphologicalcharacteristicsof776atmosphericparticlescolectedfromsixairmonitoringspotsinTaiyuanCity,ShanxiProvince,wereanalyzedwithscanningelectronicmicroscopyandenergydispersiveX-rayspectrometry,tostudytheirchemicalcompositionsinairpolution.Resultsshowedsiliconandaluminumwereabundantintheparticles,accountingfor49.4%and25%,respectively,whichindicatedtheyweremajorcompo-nentsoftheparticles.Contentsoflithophilicelements,suchassilicon,aluminumandpotassium,ontheparticlesurfaceweredecreasedrelativelywithgradualdecreaseofparticlediameter.Siliconandaluminumintheparticlesweredetectedfrequently,also,accountingfor96.55%and89%,respec-tively,whichindicatedalumina-silicateparticlesaccountedforthedominantpartinatmosphericaerosol,anddustparticlesfromvariedsourcesshoweddifferentcharacteristicsanddistributions. |
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| Keywords: | AirpolutantElement |
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