摘要
通过对郑州市2000—2006年大气降水资料分析,研究了郑州市酸雨的化学组成及其变化趋势.结果表明,降水的pH值呈现逐年减小,酸雨发生的频次逐年升高;降水中离子总量在增加,降雨具有煤烟型污染特征.降水中SO4^2-/NO3^-为1.49-3.56,呈逐年下降趋势,表明郑州市酸雨类型正逐步由硫酸型向硫酸、硝酸并重型转变.Ca^2＋/NH4＋的比值范围为0.71-1.20,呈上升趋势,Ca^2＋对降水酸性的中和作用逐年提高.
Based on analysis of atmospheric precipitation information from 2000 to 2006, the chemical composition and trend of acid rain in Zhengzhou City was studied. The results show that the pH value of precipitation has decreased year by year, the frequency of acid rain presents an increasing trend, the total ion content of rainfall is increasing, and soot characteristics lies in the acid rain. The scope of SO4^2-/NO3^- is from 1.49 to 3.56 and decreases year by year, which shows that the acid rain in Zhengzhou has changed from sulfuric acid rain type to sulfuric and nitric acid rain complex type. The range of Ca^2＋/ NH4^＋ is from 0.71 to 1.20 and show a increasing trend, and the effect of Ca^2＋ on neutralization rainfall acidity is more and more significant on a yearly basis.
出处
《河南农业大学学报》
CAS
CSCD
北大核心
2008年第4期450-453,共4页
Journal of Henan Agricultural University
基金
国家“十一五”科技支撑项目(2006BADO3A17)
关键词
酸雨
PH值
大气污染
化学组成
acid rain
pH
atmospheric pollution
chemical composition
