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X射线微会聚透镜在大气颗粒物源解析中的应用

Application of Slightly Focusing X-Ray Lens in Source Apportionment of Aerosol Particles

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摘要

为了在实验室中对大气颗粒物进行源解析,建立了基于毛细管X射线微会聚透镜和实验室X射线光源的X射线荧光(XRF)谱仪。谱仪中所使用的毛细管X射线微会聚透镜的焦斑处功率密度增益为450,透镜焦斑大小为205 μm。在X光源电压和电流分别为35 kV和70 mA的条件下,利用该谱仪对粒径为1-2 μm的大气颗粒物源样品和受体样品进行了X射线荧光定量分析。利用化学质量平衡(CMB)模型对大气颗粒物样品进行了源解析,解析结果表明汽车尾气和建筑扬尘为受体样品的主要污染源,源解析结果较为理想。实验结果表明,毛细管X射线微会聚透镜在大气颗粒物源解析中具有潜在的应用价值。

Abstract

To conduct source apportionment of aerosol particles in the laboratory,we established an X-ray fluorescence (XRF) spectrometer based on polycapillary slightly focusing X-ray lens (PSFXRL) and laboratory X-ray source. The gain of power density of the PSFXRL used in the spectrometer was 450,and the focal spot size of the PSFXRL was 205 μm. The samples of receptors and sources with diameter of 1-2 μm were quantitatively analyzed by the XRF when the working voltage and current of X-ray source were 35 kV and 70 mA. On this basis,the chemical mass balance (CMB) model was employed to apportion source contribution and the source apportionment results indicated that the main pollution source of samples for receptor were vehicle exhaust and cement dust. The source apportionment results were ideal. The experimental results show the PSFXRL has potential application in source apportionment of aerosol particles.

Newport宣传-MKS新实验室计划
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中图分类号:O434.1

DOI:10.3788/aos20103005.1527

所属栏目:X射线光学

基金项目:教育部科学技术研究重点项目基金(108125)、应用光学北京市重点实验室建设项目基金(JD100270543)、北京市自然科学基金(1092013)和高等学校博士学科点专项科研基金(200800271021)资助课题。

收稿日期:2009-05-20

修改稿日期:2009-07-07

网络出版日期:0001-01-01

作者单位    点击查看

滕玥鹏:北京师范大学 核科学与技术学院,北京 100875
孙天希:北京师范大学 核科学与技术学院,北京 100875
刘志国:北京师范大学 核科学与技术学院,北京 100875
刘辉:北京师范大学 核科学与技术学院,北京 100875
杨科:北京师范大学 核科学与技术学院,北京 100875

联系人作者:滕玥鹏(tengyuepeng@163.com)

备注:滕玥鹏|主要从事X光学器件的研制和X射线荧光分析等方面的研究|(1985-),男,硕士研究生。

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引用该论文

Teng Yuepeng,Sun Tianxi,Liu Zhiguo,Liu Hui,Yang Ke. Application of Slightly Focusing X-Ray Lens in Source Apportionment of Aerosol Particles[J]. Acta Optica Sinica, 2010, 30(5): 1527-1530

滕玥鹏,孙天希,刘志国,刘辉,杨科. X射线微会聚透镜在大气颗粒物源解析中的应用[J]. 光学学报, 2010, 30(5): 1527-1530

被引情况

【1】孙天希,刘志国,李玉德,林晓燕,罗萍,潘秋丽,杨科,袁灏,丁训良. 毛细管X光会聚透镜在潜指纹提取中的应用. 光学学报, 2011, 31(4): 434001--1

【2】孙天希,刘志国,李玉德,林晓燕,罗萍,潘秋丽,刘鹤贺,袁灏,丁训良. 毛细管X光透镜在塑料物证溯源中的应用. 光学学报, 2011, 31(5): 534001--1

【3】甘婷婷,张玉钧,赵南京,殷高方,董欣欣,王亚萍,刘建国,刘文清. 薄膜法X射线荧光光谱对重金属铬元素检测研究. 光学学报, 2014, 34(7): 730001--1

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