摘要
1987年1～2月用分八级的串列撞击式采样器在南极长城站地区进行了三次大气气溶胶采样,用质子激发X荧光分析法进行了元素质量浓度测定,获得了18种元素质量浓度的粒径分布谱。计算了气溶胶中各种粒径各元素浓度对于地壳中含量和盐度为35.0‰海水中含量的富集因子。对气溶胶中粗粒子、细粒子和超细粒子的特征进行了讨论并对它们的来源作了推测。
The atmospheric aerosol samples have been taken by a 8-stage cascade impactor sampler over the Antarctic Great Wall Station during Jan. 8 to Feb. 19, 1987. the PIXE analysis
was carried out on the 1.7×2 MV tandem accelerator at Beijing Normal University in
november of 1987. As a result, the size distribution of mass concentration of 18 elements was obtained. The enrichment factors of various elements in the atmospheric aerosol re
lative to the earth crust and the sea water with the salinity 35.0‰ were calculated. The en
richment factors of the element Mn, Fe, Si, Ti and Pb arc approximate to 1 relative to the earth crust, thus it indicates that these elements mainly come from soil, the common charac
teristic of size distribution is that the concentrations increase after larger than 8Um the
enrichment factors of the element K,Ca,Cl,S, Sr, and Br are approximate to 1 relative to the sea water, which indicates that these element mainly come from the marine aerosol, they
mainly distribute in the range of 1-8μm; the enrichment factor of various elements on the
stage 0 (particle size less than 0.25μm) relatively grow larger, which means that the contri
bution of anthropogenic, pollution become larger. According to the analyzing on the characteristic of size distribution of the aerosol mass concentration over the Antarctic Great Wall Station we suggest that the anthropogenic comtaminants of super-fine size are mainly transmitted from the other distant coninents.
出处
《南极研究》
CSCD
1990年第2期44-50,共7页
基金
国家南极考察委员会支持项目
并得到国家自然科学基金会资助
关键词
气溶胶
粒径
分布
质子X荧光
南极
aerosol, particle size distribution, PIXE, Great Wall Station
