广西城市环境空气质量变化趋势分析

The Analysis of the Variation Trend of Ambient Air Quality in Cities of Guangxi

根据2005-2009年广西14个设区市的环境空气监测数据,统计和分析了主要污染物浓度以及环境空气综合污染指数和污染负荷系数的年际变化特征及趋势,探讨影响空气质量的主要因素。结果表明,广西城市环境空气质量保持良好的水平,二氧化硫和可吸入颗粒物浓度总体上呈现下降的趋势,二氧化氮的污染程度虽然比较小,但是其浓度却逐年上升。环境空气综合污染指数呈现显著的下降趋势。二氧化硫的污染负荷系数呈现下降趋势,二氧化氮逐年上升,可吸入颗粒物则基本保持不变。二氧化硫排放量的严格控制,机动车车辆的急剧上升和城乡清洁工程的显著成效,是影响主要污染物浓度变化的重要因素。

Based on the ambient air monitoring data of 14 cities of Guangxi province during 2005- 2009,the main pollutants concentration,comprehensive pollutants index and the annual variation characteristics and trend of combined pollution load coefficient were analyzed and the influencing factors were explored.The result showed that the air quality in cities of Guangxi province is good.The trend of SO2 and PM10 concentration decreased.Although the NO2 pollution degree was low,the concentration of NO2 increased year by year.The trend of comprehensive pollution index significantly decreased.According to combined pollution load coefficient,SO2 decreased,NO2 increased and PM10 was stable.The factors influencing the variation of the main pollutants concentration included strict control of SO2 emission,steep rise in amount vehicles and remarkable effect of urban and rural clean projects.