Determination of concentrations of elements in the atmospheric aerosol of the urban and rural areas of beijing in winter |
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Authors: | Xinfu Wang |
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Institution: | (1) Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing Radiation Center, 100875 Beijing, China;(2) Radiation Beams & Material Engineering Laboratory of National Education Committee, 100875 Beijing, China |
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Abstract: | The proton-induced X-ray emission technique is one of the most suitable methods in the study of the multielement content of
atmospheric aerosols. Atmospheric aerosol samples were collected in winter using an eight-stage cascade impactor at a site
of the urban center and a rural site of Beijing. The aerosol samples collected were analyzed to determine maximum, minimum,
and average concentrations of up to 20 elements and the ratios of the average element concentrations for the coarse to fine
particles (C/F) by the PIXE technique. It has been found that the average elemental concentrations in the urban center are
higher than those in the rural area, except S and Br. The concentrations for S and Pb in the atmospheric aerosols are found
to be less than the results of previous measurement, but their concentrations in the fine particles increased in winter in
the samples from the urban center. The deposition probability of the International Commission on Radiological Protection (ICRP)
mode and the mass particle-size distributions of the elements determined in the urban center have been utilized to evaluate
inhalable particulate matter fractions retained in the three regions of one’s respiratory tract and their harm to human health
is discussed. |
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Keywords: | PIXE aerosol elemental concentration inhalable particulate matter |
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