“十二五”期间义乌市环境空气质量及影响因素分析研究

Atmospheric Environment Quality and Influential Factors During Twelfth Five-year Plan in Yiwu City

利用环境空气质量监测数据,对义乌市2011年-2015年环境空气质量变化趋势及影响因素进行了分析。结果表明,影响义乌空气质量的主要污染物为:PM2.5、PM10、NO2、O3,且大气污染呈现为扬尘和机动车尾气并存的混合型污染。尽管PM2.5、PM10和SO2总体均呈现下降趋势,尤其是SO2下降显著,但细颗粒物污染仍然突出,NO2不降反升等问题都值得关注。这可能与义乌市城市化进程进一步加快、能源结构亟待优化以及机动车保有量不断攀升等因素有关。

Using the environmental monitoring data of air pollutants in Yiwu,the air quality changing characteristics and influential factors were studied by Daniel trend test method during the Twelfth Five- year Plan. The result showed that the annual average concentrations of PM2. 5,PM10,NO2 and O3were out of limits,with a compound pollution pattern. In the long run,the pollution indexe of SO2 was falling obviously,PM10 and PM2. 5declined year by year. But PM2. 5was the first pollutant from 2013,and NO2 reflected higher concentration in 2013- 2015. These are may closely related to rapid urbanization,energy structure adjustment,vehicle population growth of Yiwu.