城市环境空气中PM_(10)和PM_(2.5)质量浓度分布的均匀性研究  

Uniformity Analysis of Distribution of PM_(10) and PM_(2. 5) Concentration in Urban Ambient Air

作　　者：周湘婷 刘孟佳[1,2,3] 罗岳平 刘礼[4] 郭卉 彭庆庆 蒋敏 

机构地区：[1]湖南省环境监测中心站,湖南长沙410019 [2]国家环境保护重金属污染监测重点实验室,湖南长沙410019 [3]湖南农业大学资源环境学院,湖南长沙410128 [4]湖南省财政厅,湖南长沙410015

出　　处：《环境监测管理与技术》2015年第1期18-21,共4页The Administration and Technique of Environmental Monitoring

基　　金：环保部公益性基金资助项目(20150919);湖南省社科基金重大招标基金资助项目(14DA12);湖南省环保科技基金资助项目

摘　　要：对长沙市环境空气中PM10、PM2.5质量浓度进行自动监测,并统计分析其分布的均匀性。结果表明,在1 d的4个典型时刻以及日内,PM2.5的质量浓度分布总体上较PM10均匀;从月内日均值及2013年1月—10月的月均值变化情况看,PM2.5质量浓度的相对标准偏差(RSD)总体高于PM10,表明PM2.5在长时间尺度上的分布较PM10更不均匀;就功能区分布而言,PM10、PM2.5质量浓度分布的均匀性没有明显的区域差异,两者的变化幅度与功能区类别没有必然联系。The concentration of PM10 and PM2.5 in Changsha City ambient air was monitored automatically, and their uniformity distribution was also analyzed.The results indicated that the distribution of PM2.5 concentra-tion was more uniform than that of PM10 in four typical moments of a day and within a day.However,from the per-spectives of daily average concentration in a month and monthly average of first 10 months in 2013,the variation coefficient of PM2.5 concentration was higher than that of PM10 as a whole.Therefore,the distribution of PM2.5 con-centration was more nonuniform than that of PM10 on long time scale.With regard to the concentration distribution in different functional area,there was no significant difference between PM10 and PM2.5 .Thus,there was no neces-sary connection between the range of change and the types of functional area.

关 键 词：城市环境空气 PM10 PM2.5 均匀性 长沙 

分 类 号：X513[环境科学与工程—环境工程] X831