重庆九龙坡城区和城郊大气污染物浓度特征研究

为了解重庆市九龙坡区城区和城郊大气污染物浓度特征,分析了城区和城郊国控空气站点2014年3月~2015年2月典型污染物的浓度变化。结果表明,除O_3表现出夏高冬低的季节变化趋势外,其它污染物均表现出冬高夏低的季节变化趋势。PM_(2.5)污染最严重,城区和郊区日均值超标率分别为31.4%和33.4%。城区和城郊的PM_(2.5)浓度之间没有显著性差异(p0.05),城郊O_3浓度显著高于城区(p0.01),NO_2、SO_2、CO和PM_(10)则是城区显著高于城郊(p0.01)。

Atmospheric Pollutants Variation in Urban and Suburb Areas of Jiulongpo District in Chongqing City

To illuminate the air pollution situation in urban and suburb areas of Jiulongpo District in Chonqing City,this pa-per analyzed the atmospheric pollutants from March 2014 to February 2015 at the two state-controlled air quality automatic moni-toring stations in Jiulongpo District. Results showed that,unlike the seasonal variation of O3,which expressed high concentrations in summer and low concentrations in winter,the other five atmospheric pollutants exhibited high concentrations in winter and low concentrations in summer. The pollution problem of PM2.5was the most serious,with the exceeding ratio of 31.4% and 33.4% for urban area and suburb,respectively. No significant differences were found for PM2.5concentrations between the urban and sub-urb,but the urban area showed significant lower O3concentrations, while higher NO2, SO2, PM10and CO concentrations than those of suburb.