眉山市城区环境空气质量及变化趋势分析

摘要

根据眉山市2006-2012年空气质量数据，采用综合污染指数法对SO2、NO2、PM10进行评价。结果表明：各污染物季节变化明显，冬季污染最严重；7年年际变化中，SO2浓度先上升后下降， NO2浓度总体呈上升趋势，PM10浓度明显下降；2012年全市主要污染物污染负荷系数从大到小排列顺序为：PM10（0.39）＞SO2（0.32）＞NO2（0.29）；综合污染指数表明眉山市空气质量属于轻污染。%The comprehensive pollution index was used to assess the concentrations of SO2 ,NO2 ,and PM10 based on the air quality data of 2006 to 2012.The results showed that obvious differences of these pollutants were found between seasons.The winter suffered the most serious pollution.During the study period,the concentration of SO2 was increasing first.Then it was falling down.However,the concentration of NO2 presented a rising trend.PM10 showed a decreasing trend.The comprehensive pollution index of these pollutants ranked as PM10 (0.39)>SO2 (0.32)>NO2 (0.29).The index indicated a light air pollution status in Meishan city.