西南地区大气中硫的化学特性及其对降雨的贡献率  

THE CHEMICAL CHARACTERISTICS OF THE ATMOSPHERIC SULFUR AND ITS CONTRIBUTION TO RAINWATER IN SOUTHWESTERN AREA

作　　者：汪安璞[1] 杨淑兰[1] 

机构地区：[1]中国科学院生态环境研究中心

出　　处：《重庆环境科学》1993年第1期16-19,共4页Chongqing Environmental Science

摘　　要：1987—1989年春秋季在西南重庆、贵阳、成都和广元等地区采集大气颗粒物和雨水样品,测定了其中S和SO_4^(2-)。探讨了颗粒物中S在粗细粒中的分布及水溶性S的百分比,估算了大气中S在气相(SO_2)、液相(H_2SO_4)及固相(SO_4^(2-))中的分配比例,得知颗粒物中S对降雨的贡献率为18～50％。Sulfur and sulfate in the atmospheric particle and rainwater collected from cities of Chongqing, Guiyang, Chengdu and Guangyuan in spring and autumn of 1987 to 1989 were determined.Size distribution of sulfur and its soluble fraction in particles, the apportionment of sulfur in gas, vapor and solid phases, and the contribution of sulfur in particles to rainwater were studied. The result indicated that the percentage of sulfur to rainwater is about 18～50％.

关 键 词：大气污染 硫 降雨 酸雨 环境保护 

分 类 号：X517[环境科学与工程—环境工程]