西南和北京地区大气颗粒物中元素特征的比较

用大容量采样器和安德逊采样器在西南地区4个城市(重庆、成都、贵阳、广元)和北方北京地区分别采集了大气环境中颗粒物的总量及粒度分级的样品.讨论了该两地区大气颗粒物中元素浓度的差别.比较结果表明,酸性元素(如S等)的相对浓度在西南地区比北京高得多,而碱性元素的相对浓度则较低,这可能是西南地区出现酸雨的重要因素之一.

A Comparison of the Elemental Charade-ristics of Atmospheric Particles between Southwestern and Beijing Areas

The hulk and size-segregated .samples of ambient particulars were collected with high volume sampler and Andersen cascade impact sampler in Tour cities (Chongqing, Chengdu, Guangyuan) of southwestern China and Beijing in northern pan of the Country. The major difference of the elemental concentrations of atmospheric particles between these areas was discussed. The results indicated that the relative concentrations of acidic elements (e. g. S) in southwestern area were higher than those in Beijing, while the cone en rations of alkaline elements (e. g. Ca) in the southwest were lower. It is one of the reasons for the occurrence of acid rain in southwest ern area of this country.