辽宁农村代表区域降水离子组成及与气态污染物相关性

气象与环境学报 ›› 2011, Vol. 27 ›› Issue (2): 62-68.doi:

辽宁农村代表区域降水离子组成及与气态污染物相关性

刘厚凤汪凯庆

山东师范大学人口?资源与环境学院，山东济南250014

收稿日期:2011-01-21 修回日期:2011-02-22 出版日期:2011-04-30 发布日期:2011-02-22

Ion composition in precipitation and its correlation with gaseous pollutants in representative rural area in Liaoning province

LIU Hou-feng WANG Kai-qing

College of Population, Resources and Environment, Shandong Normal University, Ji’nan 250014, China

Received:2011-01-21 Revised:2011-02-22 Online:2011-04-30 Published:2011-02-22

摘要/Abstract

摘要： 对辽宁农村代表区域站点辽中县马龙村观测站2007年2月至2008年1月酸雨、气态污染物浓度观测资料进行了分析。结果表明：辽中观测站降水的化学组成阴离子主要为SO₄^2-和NO₃^-，阳离子主要是NH^₄+和Ca₂⁺， SO^₄2-/ NO₃^-比值为2.9， Na⁺/Cl^-比值较大，大于1。各种离子浓度冬春季高，夏秋季较低，表明研究区域降水酸化与污染关系不显著。实测的9种主要阴离子、阳离子总浓度比（∑阴离子/∑阳离子）与降水pH值相关性不高，表明目前酸雨研究观测的主要9种阴阳离子不能完全包括降水中的离子组成。降水酸性与近地面污染气体浓度相关各异，pH与NO_x、CO、NO₂和O₃浓度有比较明显的负相关，与SO₂浓度负相关不明显；降水pH值与颗粒物等碱性污染物浓度正相关明显。降水中主要致酸离子SO₄^2-和NO₃^-的浓度与相应酸性气体污染物SO2和NOx近地面浓度的相关不明显。

关键词: 降水, 酸雨, 化学特征, 农村, 辽宁省

Abstract: The chemical characteristics of precipitation were analyzed based on the observational data of acid rain and gaseous pollutants from February 2007 to January 2008 in Malong observation station of Liaozhong county, Liaoning province. The results indicate that the primary anions of precipitation are SO₄^2- and NO₃^-, and the primary cations are NH₄⁺ and Ca₂⁺. The SO₄^2-/ NO₃^- ratio is 2.9, and the Na⁺/Cl^- ratio is greater than 1.0. The concentrations of the total ions are higher in winter and spring and lower in summer and autumn, and it shows that the relationship between regional rainfall acidification and pollution is not significant. The total concentration ratios (∑ anions / ∑ cations) of the observed 9 kinds’ ions are not obviously related with pH value of precipitation, and it suggests that the observed 9 kinds’ ions are not able to include entirely the ions compositions in precipitation under current acid rain observation conditions. The relationships between rainfall acidity and concentrations of the different gaseous pollutants near the ground are different. pH value of precipitation is a significantly negative correlation with concentrations of NO_x, CO, NO₂ and O₃, while it is not significant with the concentration of SO₂. pH value of precipitation is a significant positive correlation with concentrations of alkaline pollutants such as particulate and so on. The relationships between concentrations of main acidic ions such as SO₄^2- and NO₃^- and that of the acidic gaseous pollutants such as SO₂ and NO_x near the ground are not significant.

Key words: Precipitation, Acid rain, Chemical characteristics, Rural area, Liaoning province

中图分类号:

X832

刘厚凤, 汪凯庆. 辽宁农村代表区域降水离子组成及与气态污染物相关性[J]. 气象与环境学报, 2011, 27(2): 62-68.

LIU Hou-Feng, WANG Kai-Qing. Ion composition in precipitation and its correlation with gaseous pollutants in representative rural area in Liaoning province[J]. Journal of Meteorology and Environment, 2011, 27(2): 62-68.

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