长春市大气 PM_2.5 化学组分特征

打开文本图片集

关键词：细颗粒物（ PM2.5 ）；化学组分；大气；长春市

中图分类号：X513 文献标识码：A 文章编号：1008-9500（2025）10-0175-03

DOI： 10.3969/j.issn.1008-9500.2025.10.050

Abstract： In order to study the chemical composition characteristics of atmospheric fine particulate mater （ PM2.5， in Changchun city， PM2.5 and carbon components， water-soluble ions，and inorganic elements are continuously collected from theurban area of Changchun city from March 2O23 to February 2O24.The results showed that the average mass concentration of PM2.5 in Changchun city was （36.8±37.9）μg/m3 ，and the three components with the highest mass concentrations were Organic Matter （OM） （12.26μg/m3） ，nitrate （5.60μg/m3） ），and crustal elements （4.30μg/m3， ）.From the perspective of daily variation characteristics，the daily concentration changes of PM2.5 and its main components show significant diurnal diffrences，OMand Elemental Carbon （EC）reachtheir peak at night or earlymorning，while nitrate， sulfate，and ammonium salts peak around O9： OO and valley values all appear around 15： 00.

Keywords： fine particulate matter （PM2.5） ; chemical components; atmosphere; Changchun city

大气细颗粒物（ PM2.5 ）是影响我国大气的主要污染物，不仅会降低大气能见度，影响气候变化，而且对人体健康产生影响[1-2]。（剩余2990字）