Temporal determination of heavy metals in PM2.5 from Guiyang, Guizhou province, southwestern China
1 State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
2 US EPA, Office of Research and Development, Research Triangle Park, NC 27709, USA
Twelve hours integrated PM2.5 samples collected with a Weekly Air Particulate Sampler (URG Model 2000-01J) from September 2008 to November 2008 in Guiyang, China, were analyzed on the Kevex energy dispersive x-ray spectrometer (XRF) for elements. Monitoring results found elevated concentrations of heavy metals (Ti, Mn, Fe, Zn, and Pb) in PM2.5 in Guiyang. The average concentrations were 30±22 ng m-3 for Ti, 250±400 ng m-3 for Mn, 340±280 ng m-3 for Fe, 290±330 ng m-3 for Zn, and 130±130 ng m-3 for Pb, respectively. Temporal variation patterns in the resulting data were also obtained. It is hypothesized that local anthropogenic sources and the seasonal variability result in the temporal variability.
Key words: Heavy metals / PM2.5, Meteorological parameters / Anthropogenic sources
© Owned by the authors, published by EDP Sciences, 2013
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