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| Chemical characteristics of atmospheric dustfall and PM10 in Hangzhou |
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Abstract Samples of dustfall and PM10 as well as source samples of PM10 were collected from June 2006 to May 2008 at four monitoring stations of Hangzhou City. Twelve metals were quantified: chromium, manganese, nickel, lead, zinc, cobalt, aluminum, iron, potassium, sodium, calcium and magnesium. The deposited dust amount and concentration of PM10 was lower than most of the other cities in China. The dustfall and PM10 had different seasonal changing-mode. The similarity of spatial distribution implicated that both the amount of dustfall and concentration of PM10 were influenced by human activities. The chemical components of PM10 between Zhaohui and Yuquan were similar, whereas there was no high similarity between PM10 and dustfall in those sampling stations. Combined with the profiles of three PM10 sources, the similarity between PM10 and its sources was higher than that between dustfall and PM10 sources. It indicated that the dustfall and PM10 might come from different sources and it may cause the differences between the chemical characteristics of the dustfall and that of PM10.
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Received: 01 June 2010
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