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中国沙漠 ›› 1995, Vol. 15 ›› Issue (4): 357-361.

• 论文 • 上一篇    下一篇

兰州大气颗粒物和水溶性离子及其降水中元素组成的关系

张锐, 晁开, 张宁   

  1. 1. 甘肃省科学院生物研究所, 兰州 730000;
    2. 甘肃省环境监测中心站, 兰州 730030
  • 收稿日期:1995-03-17 修回日期:1995-07-19 出版日期:1995-12-20 发布日期:1995-12-20

ATMOSPHERIC PARTICLES IN RELATION TO WATER-SOLUBLE IONS AND ELEMENTARY COMPOSITION OF RAINFALL IN LANZHOU CITY

Zhang Rui, Chao Kai, Zhan Ning   

  1. 1. Institute of Biology Gansu Academy of Science, Lanzhou730000;
    2. Central station of Gansu Environment Observation and Testiong, Lanzhou, 730030
  • Received:1995-03-17 Revised:1995-07-19 Online:1995-12-20 Published:1995-12-20

摘要: 本文论述了兰州市区不同季节大气颗粒物污染状况,它的水溶性复合离子浓度分布,同期降水中阴、阳离子组成以及它们之间的关系。研究结果表明;该地区大气颗粒物污染较为严重。它的水溶物和同期降水化学组成复杂,SO42-与Ca2+离子浓度之和在二者的总离子中分别占59.2%和57.8%。并呈"硫酸-钙"型污染特征。受人为污染的影响颗粒物水溶性SO42-离子浓度冬季较高。受沙尘影响春季降水中的Ca2+离子浓度高于其它季节。

关键词: 大气颗粒物, 水溶性离子, 降水, 化学组成

Abstract: This paper discusses the relation between atmospheric particle contamination in different seasons, the concentration distribution of water-soluble ions and the composition of anion and cation int he rainfall at the same period in Lanzhou city. It was considered that there was a serious atmospheric particle contamination in the city;the water-soluble matter and the chemical composition of the rainwater were complicated; SO42- and Ca2+ ions accounted for 59.2%and 57.8%of the tolal ions respectively,indicating a "SO42--Ca2+" type contamination; the concentraction of water-soluble SO42- ions was higher in winter owing to man-made contamination and the concentraction of Ca2+ions in the spring rain water was higher than in other seasons as a result of sand-bearing wind.

Key words: Atmospheric particles, Water-soluble ion, Precipitation, Chemical composition