宝鸡市春季PM2.5、PM10、SO2、NO2污染现状分析

Pollution Situation of PM_(2.5),PM_(10),SO_2 and CO in Spring in Baoji

收集PM_(2.5)实时监控网提供的2015年春季宝鸡市大气污染物浓度的实时数据,分析宝鸡市各监测点大气污染物PM_(2.5)、PM_(10)、SO_2、NO_2的日均值和月均值浓度变化特征以及各污染物的负荷系数。结果表明:各监测点大气污染物月平均浓度3—5月呈下降趋势,但整体的空气质量状况有待进一步提高;宝鸡市大气颗粒物呈区域性污染,各监测点之间的差距较小,而污染气体SO_2和NO_2具有点状污染特征;4种主要的大气污染物中,PM_(2.5)和PM_(10)的贡献率超过一半以上,但SO_2和NO_2同样不可忽视。

The real - time air pollutant monitoring data of PM2.5 in spring of 2015 in Baoji were collected to analyze the daily and monthly mean concentration variation characteristics and pollution load coefficient of PM2.5, PM10, SO2, and NO2. The results showed that the average concentrations of pollutants decreased from March to May. The overall air quality status remained to be further improved. The whole Baoji was polluted by particulates since the monitoring data among monitoring sites was small. However, SO2 and NO2 have caused point pollution. The contri-bution rates of PM2.5 and PM10 were more than half. Therefore, SO2 and NO2 could not be ignored.