无锡市PM_(2.5)污染过程的含碳气溶胶变化特征及其来源分析  

Analysis on the Change Characteristics and Its Source of Carbon-containing Aerosol in the Process of PM_(2.5) Pollution in Wuxi City

作　　者：宋大伟 顾雪松 耿磊 东梅 SONG Dawei;GU Xuesong;GENG Lei;DONG Mei(Wuxi Environmental Monitoring Center of Jiangsu Province,Wuxi 214121,China)

机构地区：[1]江苏省无锡环境监测中心,江苏无锡214121

出　　处：《中国资源综合利用》2021年第12期151-153,共3页China Resources Comprehensive Utilization

基　　金：江苏省PM_(2.5)与臭氧协同控制重大专项(2019023)。

摘　　要：本研究利用含碳气溶胶在线连续监测数据,分析无锡市PM_(2.5)污染过程中含碳气溶胶的变化特征及其来源。结果表明,无锡市PM_(2.5)含碳气溶胶中,有机碳(OC)、元素碳(EC)受上下班高峰期机动车尾气大量排放的影响,呈现出明显的峰谷特征;元素碳和一次有机碳排放增多是碳气溶胶污染的主要贡献来源。来源分析表明,良至轻度污染阶段含碳气溶胶以本地污染为主,PM_(2.5)高浓度时段受周边城市外来源与本地源排放共同影响。This study uses the online continuous monitoring data of carbon-containing aerosols to analyze the change characteristics and sources of carbon-containing aerosols during the PM_(2.5)pollution process in Wuxi City.The results show that in the PM_(2.5)carbon-containing aerosols in Wuxi City,organic carbon (OC) and elemental carbon (EC) are affected by the large amount of exhaust emissions from motor vehicles during peak hours,showing obvious peak and valley characteristics;increasing emissions of elemental carbon and primary organic carbon are the main contributing sources of carbon aerosol pollution.Source analysis shows that the carbon-containing aerosols in the period from good to light pollution are mainly local pollution,and the period of high PM_(2.5)concentration is affected by both external sources in the surrounding cities and local sources.

关 键 词：PM_(2.5)含碳气溶胶 有机碳 元素碳 

分 类 号：X513[环境科学与工程—环境工程]