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Speciation of the elements and compositions on the surfaces of dust storm particles:The evidence for the coupling of iron with sulfur in aerosol during the long-range transport

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Chinese Science Bulletin 2005年第8期50卷 738-744页

作者： zhang xingying1,2. zhuang guoshun1,2.3, CHEN Jianmin2.& XUE Huaxin2.1. Center for Atmospheric Environment Study,{2., beijing normal university, beijing 100875, china 2. Center for Atmospheric chemistry Study, department of Environ- mental Science and Engineering, Fudan university, Shanghai 2.0433, china 3. LAPC/NZC, Institute of Atmospheric Physics, NZC/LAPC, Chinese Academy of Sciences, beijing 10002., china 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 Chinese Academy of Sciences Beijing 100029 China

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 ma- jor species of iron on the surface were oxides, sulfate, silicate, FeOOH and minor part sorbed on SiO2.Al2.3. Sulfate is the dominant species of sulfur on the surface. SiO2.and Al2.3 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 2., 2.02. 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 en- riched 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 sup- port 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.

关键词：物种形成原理 XPS 大气悬浮物 Fe-S结合粒子集合

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Coupling and feedback between iron and sulphur in air-sea exchange

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Chinese Science Bulletin 2003年第11期48卷 1080-1086页

作者： zhuang guoshun GUO Jinghua YUAN Hui {2. xingying The Center for Atmospheric Environmental Study Beijing Normal UniversityThe Center for Atmospheric Environmental Study Beijing Normal UniversityThe Center for Atmospheric Environmental Study Beijing Normal UniversityThe Center for Atmospheric Environmental Study Beijing Normal University Beijing 100875 China Beijing 100875 China Beijing 100875 China Beijing 100875 China

Iron in surface seawater has been demonstrated to be the limiting nutrient factor for primary productivity in certain oceanic regions. In 1992.we reported in Nature at first Fe(II) existence in marine aerosols over the remote Pacific and Atlantic and proposed the hypothesis of coupling and feedback between iron and sulfur in air-sea exchange. We recently detected a considerable amount of Fe(II) in the aerosols collected during dust storm in beijing. The concentration of Fe(II) in the dust storm was as high as 1.8-4.3 μg · m -3 that accounted for 1.4%-2.6% of the total Fe mass concentration in aerosols, while Fe(II) in the aerosols collected from non-dust storm days was 0.7% of the total Fe. Fe and S concentrations in the dust storm aerosol samples represent a very positive correlationship. The size distribution of Fe, Fe(II), and S in either dust storm particles or the normal aerosols showed the same peak at 1-3 μm. The oxidation of S(IV) under natural light and UV in addition of Fe(III) was 6.5 and 14 times faster respectively compared with that of non-addition. The photoreduction of Fe(III) to Fe(II), through the formation of an OH. radical, associated with the oxidation of S(IV) to S(VI) could account for ∼3%-2.% of the formation of non-sea salt sulfate aerosols at Midway, central Pacific. These results further support the Fe-S coupling hypothesis. From consideration of both the marine biological production of dimethylsulphide (DMS) and the subsequent oxidation of reduced forms of sulfur in the atmosphere, the iron and sulphur cycles in both the atmosphere and the ocean may be closely coupled.

关键词：铁元素海空交换沙尘暴硫元素氧化硫气溶胶海洋天气

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Source apportionment for urban PM_(10) and PM_(2.5) in the beijing area

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Chinese Science Bulletin 2007年第5期52卷 608-615页

作者： zhang Wei GUO JingHua SUN YeLe YUAN Hui zhuang {2. zhuang YaHui HAO ZhengPing Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Center for Atmospheric Environmental Study Department of Chemistry Beijing Normal University Beijing 100875 China

Airborne particulate matter (PM2.5 and PM10) samples were collected at the beijing normal university sampling site in the urban area of beijing,{2. in dry and wet seasons during 2.01―2.04. Concen-trations of 2. elements and 14 ions in particulate samples were determined by ICP-AES and IC, re-spectively. Source apportionment results derived from both Positive Matrix Factorization (PMF) and Chemical Mass Balance (CMB) models indicate that the major contributors of PM2.5 and PM10 in beijing are: soil dust, fossil fuel combustion, vehicle exhausts, secondary particulate, biomass burning and some industrial sources. We have identified both regional common sources, such as vehicular emis-sions, particulate of secondary origin and biomass burning, as well as country-specific problems, such as sand storms and soil dust that should be addressed for effective air quality control.

关键词：北京地区城区空气颗粒物 PM10 PM2.5 污染源

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