Chemical characterization and sources of PM2.5 at 12-h resolution in Guiyang, China

Chemical characterization and sources of PM2.5 at 12-h resolution in Guiyang, China The increasing emission of primary and gaseous precursors of secondarily formed atmospheric particulate matter due to continuing industrial development and urbanization are leading to an increased public awareness of environmental issues and human health risks in China. As part of a pilot study, 12-h integrated fine fraction particulate matter (PM2.5) filter samples were collected to chemically characterize and investigate the sources of ambient particulate matter in Guiyang City, Guizhou Province, southwestern China. Results showed that the 12-h integrated PM2.5 concentrations exhibited a daytime average of 51 ± 22 µg m−3 (mean ± standard deviation) with a range of 17–128 µg m−3 and a nighttime average of 55 ± 32 µg m−3 with a range of 4–186 µg m−3. The 24-h integrated PM2.5 concentrations varied from 15 to 157 µg m−3, with a mean value of 53 ± 25 µg m−3, which exceeded the 24-h PM2.5 standard of 35 µg m−3 set by USEPA, but was below the standard of 75 µg m−3, set by China Ministry of Environmental Protection. Energy-dispersive X-ray fluorescence spectrometry (XRF) was applied to determine PM2.5 chemical element concentrations. The order of concentrations of heavy metals in PM2.5 were iron (Fe) > zinc (Zn) > manganese (Mn) > lead (Pb) > arsenic (As) > chromium (Cr). The total concentration of 18 chemical elements was 13 ± 2 µg m−3, accounting for 25% in PM2.5, which is comparable to other major cities in China, but much higher than cities outside of China. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Chinese Journal of Geochemistry Springer Journals

Chemical characterization and sources of PM2.5 at 12-h resolution in Guiyang, China

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Publisher
Science Press
Copyright
Copyright © 2017 by Science Press, Institute of Geochemistry, CAS and Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Earth Sciences; Geochemistry
ISSN
1000-9426
eISSN
2365-7499
D.O.I.
10.1007/s11631-017-0248-1
Publisher site
See Article on Publisher Site

Abstract

The increasing emission of primary and gaseous precursors of secondarily formed atmospheric particulate matter due to continuing industrial development and urbanization are leading to an increased public awareness of environmental issues and human health risks in China. As part of a pilot study, 12-h integrated fine fraction particulate matter (PM2.5) filter samples were collected to chemically characterize and investigate the sources of ambient particulate matter in Guiyang City, Guizhou Province, southwestern China. Results showed that the 12-h integrated PM2.5 concentrations exhibited a daytime average of 51 ± 22 µg m−3 (mean ± standard deviation) with a range of 17–128 µg m−3 and a nighttime average of 55 ± 32 µg m−3 with a range of 4–186 µg m−3. The 24-h integrated PM2.5 concentrations varied from 15 to 157 µg m−3, with a mean value of 53 ± 25 µg m−3, which exceeded the 24-h PM2.5 standard of 35 µg m−3 set by USEPA, but was below the standard of 75 µg m−3, set by China Ministry of Environmental Protection. Energy-dispersive X-ray fluorescence spectrometry (XRF) was applied to determine PM2.5 chemical element concentrations. The order of concentrations of heavy metals in PM2.5 were iron (Fe) > zinc (Zn) > manganese (Mn) > lead (Pb) > arsenic (As) > chromium (Cr). The total concentration of 18 chemical elements was 13 ± 2 µg m−3, accounting for 25% in PM2.5, which is comparable to other major cities in China, but much higher than cities outside of China.

Journal

Chinese Journal of GeochemistrySpringer Journals

Published: Nov 7, 2017

References

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