上海地区酸雨趋势及其影响,对策研究

本文研究了上海地区酸雨的趋势及其影响与对策。结果表明,上海地区的降水年均pH值,市区约为4.76.郊县为5.51左右;自1983以来,变化不大。降水离子含量很高,说明受污染严重。研究表明,市区酸雨主要为硒地SO_2污染所致。近地面大气中的高浓度酸、碱性污染物,对降水pH值起重要作用。防治酸雨的主要措施在于脱硫。目前,酸雨对水域、土壤、农作物、水生生物等未造成严重影响。治理酸雨,不是上海地区的当务之急。

STUDY ON THE TREND, EFFECTS AND COUNTERMEASURES OF ACID RAIN IN SHANGHAI AREA

The status quo and trend of acid rain in Shanghai area as well as its effects were studied. The average pH values of the rain water were almost unchanged in recent ten years, including the seasonal variation. The annual average pH value was 4.76 in urban area and 5.51 in rural area. But the rain water was serious. ly polluted by various air pollutants. Acidity of rain water in Shanghai area was mainly derived from SO_2. The acid and alkaline components in the atmosphere play important role to the variation of the pH value of rain water. Hitherto, acid rain in Shanghai area does not cause serious damage to the river, lake, soil, crops and aquatic lives in this area, therefore, to control acid rain may not be in urgent recently.