Speciation of the elements and compositions on the surfaces of dust storm particles: The evidence for the coupling of ir

Abstract： The speciation of the elements on the surface of the particles collected during dust storm and non-dust storm in Beijing and Inner Mongolia was studied by XPS. The major species of iron on the surface were oxides, sulfate, silicate, FeOOH and minor part sorbed on SiO2/Al2O3. Sulfate is the dominant species of sulfur on the surface. SiO2 and Al2O3 are the main components of Si and Al on the surface respectively. One of the most important findings was that the Fe(II) (FeS and FeSO4) produced could account for up to 44.3% and 45.6% of the total Fe on the surface in the aerosol sample collected at that night and next day of the "peak" time of the dust storm occurring on March 20, 2002, while Fe2(SO4)3, one of the Fe(III) species on the surface decreased from 67.1% to 49.5% and 48.0% respectively. Both S and Fe enriched on the surface of aerosol particles. Fe(II) accounted for 1.3%-5.3% of total Fe in bulk aerosol samples during dust storm. These results provided strong evidence to support the hypothesis of the coupling between iron and sulfur in aerosols during the long-range transport, which would have important impact on the global biogeochemical cycle. 作 者： ZHANG Xingying    ZHUANG Guoshun    Chen Jianmin    XUE Huaxin   作者單位： ZHANG Xingying(Center for Atmospheric Environment Study, Department of Chemistry, Beijing Normal University, Beijing 100875, China;Center for Atmospheric Chemistry Study, Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China)

ZHUANG Guoshun(Center for Atmospheric Environment Study, Department of Chemistry, Beijing Normal University, Beijing 100875, China;Center for Atmospheric Chemistry Study, Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China;LAPC/NZC, Institute of Atmospheric Physics, NZC/LAPC, Chinese Academy of Sciences, Beijing 100029, China)

Chen Jianmin,XUE Huaxin(Center for Atmospheric Chemistry Study, Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China) 

期 刊： 科學通報（英文版）  SCI   Journal： CHINESE SCIENCE BULLETIN  年，卷(期)： 2005, 50(8)  分類號： X4  Keywords： dust storm    XPS    atmospheric aerosol    particles    speciation of elements    Fe-S coupling   

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