长株潭城市环境空气中PM_(2.5)和O_3质量浓度的相关性研究  

Correlation study on PM_(2.5) and O_3 mass concentrations in ambient air by taking urban cluster of Changsha,Zhuzhou and Xiangtan as an example

作　　者：罗岳平 刘孟佳[1,2,3] 甘杰 周湘婷 蒋敏 杨仁斌[3] 

机构地区：[1]湖南省环境监测中心站,长沙410019 [2]国家环境保护重金属污染监测重点实验室,长沙410019 [3]湖南农业大学资源环境学院,长沙410128

出　　处：《安全与环境学报》2015年第4期313-317,共5页Journal of Safety and Environment

基　　金：2014年湖南省社科基金重大招标项目(14DA12);环保公益性行业科研专项(201509019)

摘　　要：PM2.5与O3均为导致城市环境空气质量恶化的主要污染物,采用自动设备监测湖南省长沙、株洲、湘潭3市商业区和郊区空气中的PM2.5和O3质量浓度,并对数据进行相关性分析。结果表明:PM2.5和O3质量浓度的季节性变化大,其中O3质量浓度夏、秋2季高,春、冬2季低;PM2.5则秋、冬2季高,春、夏2季低;O3质量浓度峰值一般出现在当天午后,PM2.5质量浓度峰值一般出现在上午;空间分布上,O3质量浓度在郊区站点相对较高,而PM2.5质量浓度在商业区站点较高。PM2.5与O3质量浓度变化以负相关为主,即PM2.5质量浓度高时,O3质量浓度则低,反之亦然,二者一般不产生叠加污染。总体上,夏、秋季节应主要防O3污染,春、冬季节则主要防PM2.5污染。The present paper intends to introduce our comparative analysis of PM2. 5and O3 mass concentrations by taking the downtown and suburban building and living cluster of Changsha,Zhuzhou and Xiangtan as a study sample in hoping to show the deterioration of the urban ambient air quality. In our investigation,we have adopted some automatic monitoring equipments in our activities for monitoring the mass concentrations of PM2. 5and O3,etc. The results of our investigation and analysis indicate that the mass concentrations or pollution degrees of PM2. 5and O3 have been becoming various with seasons. As a matter of fact,the mass concentrations of O3 in summer and autumn turn out to be much higher than that in winter and spring. On the contrary,the mass concentrations of PM2. 5tend to be higher in winter and autumn,but lower in summer and spring. In terms of daily peak mass concentration of O3,it is usually taking place in the afternoon,whereas the daily peak mass concentration of PM2. 5usually comes about in the morning. And in terms of the spatial distribution,the mass concentration of O3 in the suburban areas tends to be higher than that in the downtown areas though the mass concentration of PM2. 5remains high in the downtown areas. On the other hand,generally speaking,the variations of PM2. 5and O3 mass concentrations prove to be in negative correlation as the result of our analysis. When PM2. 5mass concentration tends to be high,O3 mass concentration becomes low,and vice versa,though they do not lead to superimpose contamination. On the whole,the concentration of O3 tends to change more regularly than that of PM2. 5. For example,in terms of a year,O3 pollution tends to be heavier in high-temperature and strong-illumination seasons,whereas in terms of a day,the peak mass concentration of O3 occurs at the high-temperature and strong-illumination periods of time. Therefore,O3 pollution tend to be predicable,but PM2. 5pollution has not only been affected by the pollutant emissions,but also stays with the weather condition

关 键 词：环境学 相关性分析 城市环境空气质量 PM2.5 O3 

分 类 号：X513[环境科学与工程—环境工程]