INAA study for characterization of PM10 and PM2.5 in Beijing and influence of dust storm |
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| Authors: | Y. Song D. D. Xu Z. F. Chai H. Ouyang W. Y. Feng X. Y. Mao |
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| Affiliation: | (1) Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Academia Sinica, P.O.Box 918, 100049 Beijing, P.R. China;(2) Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Academia Sinica, P.O.Box 918, 100049 Beijing, P.R. China;(3) Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Academia Sinica; Institute of Nuclear Technology, Shenzhen University, P.O.Box 918, 100049 Beijing, P.R. China; 518060 Shenzhen, P.R. China;(4) Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Academia Sinica, P.O.Box 918, 100049 Beijing, P.R. China;(5) Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Academia Sinica, P.O.Box 918, 100049 Beijing, P.R. China;(6) Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Academia Sinica, P.O.Box 918, 100049 Beijing, P.R. China |
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| Abstract: | Summary PM10 and PM2.5 samples were collected simultaneously in Beijing, China, and analyzed by INAA and ICP-MS. Seasonal variations of the concentrations of ambient particles and their elemental compositions were found. The main sources of PM10 and PM2.5 in spring were the crust, coal burning and vehicle exhaust, in which the former was significant. During a strong dust storm, the concentrations of the crustal elements in PM10 and PM2.5 increased remarkably, but the concentrations of some anthropogenic elements decreased. The enrichment factors of these anthropogenic elements also decreased sharply during the dust storm, which indicated that they were mostly originated from local anthropogenic pollution and diluted by the huge amount of dust. |
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