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首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Surface sample collection and dust source analysis in northwestern China.
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Surface sample collection and dust source analysis in northwestern China.

机译：中国西北地区的地表样品收集和粉尘源分析。

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Analysis of particle size shows that fractions of PM50 (particle <50 micro m in diameter) in the alluvial and lacustrine sediments, gobi deserts, shrub dunes, mobile dunes and deteriorated land are 37-99%, 5-7%, 0.26-36%, 0.05-0.4% and 51-62%, respectively. Mobile dunes, which are extensively distributed in northwestern China, are not a significant contributor to geogenic dust emissions due to their very low fractions of PM50. Particle size distributions of different surface types, SEM, X-ray diffractogram and element content analysis all show that lacustrine sediment, shrub dune, gobi desert and deteriorated land are the most potential geogenic dust contributors. These analyses were also applied to the dust samples. Results and monthly dust disposition and dust event distributions show that the dust in the urban region of northwestern China, to a large extent, comes from non-geogenic contributors such as motor vehicle exhaust, coal burning and industrial emission..
机译：粒度分析表明，冲积和湖沉积物，戈壁滩，灌木沙丘，流动沙丘和退化土地中的PM50（直径小于50微米的颗粒）的比例分别为37-99％，5-7％，0.26-36 ％，0.05-0.4％和51-62％。在中国西北地区广泛分布的流动沙丘，由于其PM50含量极低，因此并不是造成尘土排放的重要因素。不同表面类型的粒径分布，SEM，X射线衍射图和元素含量分析均表明，湖沉积物，灌木沙丘，戈壁滩和退化土地是最可能的成因粉尘来源。这些分析也适用于粉尘样品。结果和每月的尘埃分布和尘埃事件分布表明，西北城市地区的尘埃在很大程度上来自汽车，废气，燃煤和工业排放等非地质因素。

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