西南地区降雨对大气中元素的清洗作用  

PRECIPITATION SCAVENGING OF ELEMENTS IN SOUTHWESTERN ATMOSPHERE

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：《环境化学》1991年第6期52-55,共4页Environmental Chemistry

摘　　要：探讨了西南地区城市、郊区和偏远地区降雨对大气中某些元素及SO_4^(2-),NO_3^-,HNO_3等的清洗作用,估算了不同地区元素的清洗削减率。结果表明,降雨时HNO_3和NO_3^-的清洗作用比SO_4^(2-)大,雨水中的S约有83％以SO_4^(2-)状态存在。Decrease of concentration of some elements and SO42-,NO3-and HNO3 in atmosphere by precipitation scavenging effect of rainfall in urban, suburban and remote sites in southwestern areas have been studied. The results indicate that scavenging ratio for HNO3 and NO3- is higher than that for SO42-. Amount of SO42- accounts for roughly 83% of S in rain water.

关 键 词：降雨 大气颗粒物 元素 清洗作用 

分 类 号：X513.02[环境科学与工程—环境工程]