| Mineralogical characteristics of airborne particles collected in Beijing during a severe Asian dust storm period in spring 2002 |
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| 作者姓名： | SHAO LongYi LI WeiJun YANG ShuShen SHI ZongBo & L SenLin The State Key Laboratory of Coal Resources and Safety Mining China University of Mining and Technology Beijing China |
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| 作者单位： | SHAO LongYi1，2，LI WeiJun1，2，YANG ShuShen1，2，SHI ZongBo3 & L SenLin1，2 1 The State Key Laboratory of Coal Resources and Safety Mining，China University of Mining and Technology，Beijing 100083，China; 2 Department of Resources and Earth Sciences，China University of Mining and Technology，Beijing 100083，China; 3 Faculty of Environmental and Symbiotic Sciences，Prefectural University of Kumamoto，Kumamoto 862-8502，Japan |
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| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金;教育部跨世纪优秀人才培养计划 |
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| 摘 要： | Asian dust storm (ADS) samples were collected on March 20,2002 in Beijing,China. High-resolution field emission scanning electron microscopy with energy dispersive X-ray detector (FESEM-EDX) and X-ray diffraction (XRD) were used to study the morphology,chemical compositions,number-size dis-tributions and mineralogical compositions of ADS particles. The mineral particles were major compo-nents in the ADS samples,accounting for 94% by number. The XRD analysis indicated that the dust particles were dominated by clay (40.3%),and quartz (19.5%),followed by plagioclase (8.4%),calcite (7.5%),K-feldspar (1.5%),hematite (0.9%),pyrite (0.9%),hornblende (0.4%) and gypsum (0.3%),with a certain amount of noncrystalline materials (20.3%). Clay minerals were mainly illite/smectite mixed lay-ers (78%),followed by illite (9%),kaolinite (6%),and chlorite (7%). In addition to these main minerals,FESEM-EDX also detected some trace minerals,such as dolomite,pyrite,thenardite,as well as heavy minerals represented by rutile,ilmenite and apatite. The mineralogical compositions of the 2002-03-20 Asian dust storm and the Saharan dust plumes were similar but the clay mineralogy showed a great distinction,with the illite/smectite mixed layers being common in the Asian dust storm but illite being common in the Saharan dust plumes.
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| 收稿时间： | 18 September 2005 |
| 修稿时间： | 29 May 2006 |
Mineralogical characteristics of airborne particles collected in Beijing during a severe Asian dust storm period in spring 2002 |
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| Shao?LongYi,Li?WeiJun,Yang?ShuShen,Shi?ZongBo,Lü?SenLin.Mineralogical characteristics of airborne particles collected in Beijing during a severe Asian dust storm period in spring 2002[J].Science in China(Earth Sciences),2007,50(6):953-959. |
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| Authors: | Shao LongYi Li WeiJun Yang ShuShen Shi ZongBo Lü SenLin |
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| Institution: | 1. The State Key Laboratory of Coal Resources and Safety Mining, China University of Mining and Technology, Beijing 100083, China;Department of Resources and Earth Sciences, China University of Mining and Technology, Beijing 100083, China
2. Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, Kumamoto 862-8502, Japan |
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| Abstract: | Asian dust storm (ADS) samples were collected on March 20,2002 in Beijing,China. High-resolution field emission scanning electron microscopy with energy dispersive X-ray detector (FESEM-EDX) and X-ray diffraction (XRD) were used to study the morphology,chemical compositions,number-size dis-tributions and mineralogical compositions of ADS particles. The mineral particles were major compo-nents in the ADS samples,accounting for 94% by number. The XRD analysis indicated that the dust particles were dominated by clay (40.3%),and quartz (19.5%),followed by plagioclase (8.4%),calcite (7.5%),K-feldspar (1.5%),hematite (0.9%),pyrite (0.9%),hornblende (0.4%) and gypsum (0.3%),with a certain amount of noncrystalline materials (20.3%). Clay minerals were mainly illite/smectite mixed lay-ers (78%),followed by illite (9%),kaolinite (6%),and chlorite (7%). In addition to these main minerals,FESEM-EDX also detected some trace minerals,such as dolomite,pyrite,thenardite,as well as heavy minerals represented by rutile,ilmenite and apatite. The mineralogical compositions of the 2002-03-20 Asian dust storm and the Saharan dust plumes were similar but the clay mineralogy showed a great distinction,with the illite/smectite mixed layers being common in the Asian dust storm but illite being common in the Saharan dust plumes. |
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| Keywords: | Asian dust storm (ADS) inhalable particle (PM10) X-ray diffraction (XRD) individual particles analysis Beijing |
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