广安市大气污染物浓度特征分析  

Analysis of concentration characteristics of air pollutants in Guang'an city

作　　者：李艳 黎云祥 权秋梅 Li Yan;Li Yunxiang;Quan Qiumei(School of Environmental Science and Engineering,China West Normal University,Nanchong Sichuan 637002,China)

机构地区：[1]西华师范大学环境科学与工程学院,四川南充637002

出　　处：《环境与发展》2021年第3期139-145,156,共8页Environment & Development

摘　　要：目的:为了解广安市的大气污染特征及2020年疫情前后广安市主城区大气污染物浓度的时间变化特征,分析广安市大气污染物的年变化、月变化特征以及分析我国春节及疫情防控期间的广安市大气污染物浓度的变化趋势。结果:(1)2019年广安市空气质量的优良的天数达81.5%,2020年空气质量为优、良的天数占89.3%,是三年中空气质量最好的。(2)PM_(2.5)和PM_(10)呈下降趋势;SO_(2)呈中间高、两端低的趋势;CO在2018年和2019年呈中间低、两端高的趋势,2020年的CO浓度整体呈下降趋势;NO_(2)浓度在一月份达到最大值;O_(3)呈先上升、后下降的趋势。通过SPSS的相关性分析结果PM_(2.5)和PM_(10)的相关系数为0.966,表明粒径不相同的颗粒物的排放存在一定的协同性;而O3污染物与其他五类污染物都成负相关关系,其中与NO_(2)的负相关性较高,主要原因与光化学反应有关。(3)2018年的主要污染物是PM_(2.5)和PM_(10),2019年和2020年的大气年均浓度均达标,空气质量较好。(4)春节期间人们大量燃放烟花爆竹至造成空气质量污染严重的主要原因。In order to understand the characteristics of air pollution in Guang'an City and the temporal changes in the concentration of air pollutants in Guang'an City during and after the outbreak of new crown pneumonia in 2020,the urban air pollutants(PM_(2.5))of Guang'an City from January to August in 2018,2019 and 2020.5,PM_(10),SO_(2),CO,NO_(2),and O_(3) and other monitoring data,analyze the annual and monthly changes of atmospheric pollutants in Guang'an City,and analyze the change trend of atmospheric pollutant concentration in Guang'an City during the Spring Festival and epidemic prevention and control period in my country.Results(1)The number of days with good or good air quality in 2019 reached 81.5%,and the number of days with good or good air quality in 2020 accounted for 89.3%,the best air quality in three years.(2)The main pollutants in 2018 are PM_(2.5) and PM_(10).The annual average concentration of the atmosphere in 2019 and 2020 is up to the standard,and the air quality is good.(3)During the Spring Festival,people set off a large number of fireworks and firecrackers to cause serious air quality pollution.

关 键 词：广安市 大气污染物 特征变化 

分 类 号：X831[环境科学与工程—环境工程]