淄博市“十二五”期间大气降水化学组分变化趋势分析

Analysis on Chemical Composition Change Trend of Atmospheric Precipitation during the Period of the 12th Five-Year in Zibo

为研究"十二五"期间淄博市大气降水化学组分变化趋势,采用离子当量浓度百分比变化和秩相关系数法对9个监测点5年的监测数据进行了分析。分析结果表明:淄博市降水中总阴阳离子在0.8~1.2允许变动范围内,总体保持平衡,但硫酸根离子对酸性降水的贡献值减弱,硝酸根离子的贡献值加大;钙离子对降水的中和能力减弱,铵离子的中和能力增强。

In order to study the change trend of chemical composition of atmospheric precipitation during the period of"the12th Five-Year"in Zibo,the percentage variation of ionic equivalent concentration and rank correlation coefficient were adopted to analyze the monitoring data of9sites in5years.The analysis results showed that the total anion and cation of precipitation in Zibo could overall balance in the allowable range of0.8~1.2.Nevertheless,the contribution of sulfateion to acid precipitation decreased,while the contribution of nitrate ion increased.In addition,the neutralization ability of calcium ion to precipitation decreased,while the neutralization ability of ammonium ion increased.