干旱区生态环境知识资源中心(Arid): 上海春季沙尘与非沙尘天气大气颗粒物粒度组成与矿物成分

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	上海春季沙尘与非沙尘天气大气颗粒物粒度组成与矿物成分
其他题名	Particle Size Distribution and Mineral Components of Atmospheric Particles Collected in Spring of Shanghai
	师育新 1; 戴雪荣 2; 宋之光 1; 俞立中 3; 管章志 2
ISSN	1000-694X
出版年	2006
卷号	26 期号:5 页码:780-785
中文摘要	上海春季典型沙尘天气的湿降尘和非沙尘天气总悬浮颗粒物、自然降尘的粒度分析结果表明,沙尘天气湿降尘几乎全部由＜63mum的颗粒组成(99.45%),其中10～50 mum、5～10 mum和＜5mum的含量分别占49.02%、21.75%和27.14%,平均粒径为13.57mum,分选差.这一粒度特征与马兰黄土和下蜀黄土很相似.非沙尘天气总悬浮颗粒物的粒度分布范围和均值与湿降尘很接近,自然降尘颗粒则明显较粗.矿物X-衍射物相及半定量分析结果表明,上述三种大气颗粒物都由粘土矿物、石英、钾长石、斜长石、方解石、白云石、石膏、角闪石等组成,所不同的是湿降尘中含有较多来自西北干旱半干旱区远源输入的矿物颗粒;而非沙尘天气总悬浮颗粒物中石膏含量较高(达14.59%),推测为溶解在大气中的气态污染物SO2与方解石作用形成的二次污染颗粒.
英文摘要	By using Laser Particle Size Analyzer and XRD systems, this paper discusses the characteristics of particle size distribution and mineral components of three different types of atmospheric particles collected in the spring of Shanghai. They are the rain-born dust (RBD) as the dust-storm happening in northwest China, the total suspended particles (TSP) and the normal air-born dust (ABD). The particle size data show that over 99.45% of RBD is less than 60 mum (13.57 mum in average) and the <30 mum part takes the majority with a bad sorting degree. The content of coarse silt, fine silt and clay are 49.02%, 21.75% and 27.14% respectively. Such a particle size distribution is much similar to that of Malan loess (in North China) and Xiashu loess (in lower Yangtze River) formed in Late Pleistocene, supporting that the Xiashu loess is of eoline origin. The particle size distribution of RBD can also be compared to TSP, but both much finer than ABD. The X-ray diffraction analysis data show that all the samples can be identified as clay minerals, quartz, potash feldspar, plagioclase, calcite, dolomite, gypsum and amphibole etc. But there are still some differences between each other. The RBD contains relatively more mineral materials, indicating that it derived from the northwest arid and semiarid areas in China. The content of gypsum in TSP reaches up to 14.59%, which can be considered as the secondly polluted particulates formed by the SO_2 gas in the air meeting together with calcite. The gypsum in TSP, therefore, can be used as an indicator of SO_2 pollutant in the atmospheric environment of Shanghai.
中文关键词	大气颗粒物 ; 沙尘暴 ; 粒度分析 ; 矿物分析 ; 上海
英文关键词	atmospheric particles dust-storm particle size analysis mineral analysis Shanghai
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:2441755
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220484
作者单位	1.中国科学院广州地球化学研究所, 有机地球化学国家重点实验室, 广州, 广东 510640, 中国; 2.华东师范大学地理系, 上海 200062, 中国; 3.华东师范大学, 河口海岸国家重点实验室, 上海 200062, 中国
推荐引用方式 GB/T 7714	师育新,戴雪荣,宋之光,等. 上海春季沙尘与非沙尘天气大气颗粒物粒度组成与矿物成分[J],2006,26(5):780-785.
APA	师育新,戴雪荣,宋之光,俞立中,&管章志.(2006).上海春季沙尘与非沙尘天气大气颗粒物粒度组成与矿物成分.,26(5),780-785.
MLA	师育新,et al."上海春季沙尘与非沙尘天气大气颗粒物粒度组成与矿物成分".26.5(2006):780-785.