文山市城区2008-2012年空气质量变化及其趋势分析

摘要

对文山城区2008-2012年空气中SO2、NO2和PM10含量监测数据进行分析，结果显示SO2、NO2浓度的年际变化呈增加的趋势，而可吸入颗粒物呈逐年降低的趋势。进行污染指数、污染负荷以及Spearman秩相关系数趋势分析，结果显示：空气综合污染指数在逐年增加，目前文山城区空气中的主要污染物是PM10，其次是SO2和NO2，SO2的浓度秩相关系数Rs＝0.9＝WP 0.9，SO2的变化为显著上升；NO2的浓度秩相关系数WP 0.9＞Rs＝0.80≥WP 0.5，NO2的变化为平稳偏上升趋势。%The contents of SO2,NO2,and PM10 from 2008 to 2012 in the air in Wencheng district were analyzed. The results showed that the concentrations of SO2 and NO2 were increasing from 2008 to 2012.However,the con-tent of PM10 was reducing in the same time period.Pollution index,pollution load,and Spearman rank correlation coefficient method were employed to explore the changes and trends of air quality.The air pollution index in Wencheng was increasing year by year.The main air pollutant is PM10 ,followed by SO2 and NO2 .The rank corre-lation coefficient of SO2 was Rs=0.9 =WP0.9 indicating that the contents of SO2 in the air was dramatically in-creased.The rank correlation coefficient of NO2 was Rs=0.80 WP0.9 showing a steady increase.