锦州市道路扬尘碳组分特征及来源分析  

Characteristics and Source Analysis of Carbon Component in Road Dust in Jinzhou City

作　　者：杨益 姬亚芹[1,2] 高玉宗 林孜 林宇 Yang Yi;Ji Yaqin;Gao Yuzong;Lin Zi;Lin Yu(College of Environmental Science and Engineering,Nankai University,Tianjin 300350,China;State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control,Tianjin 300350,China)

机构地区：[1]南开大学环境科学与工程学院,天津300350 [2]国家环境保护城市空气颗粒物污染防治重点实验室,天津300350

出　　处：《南开大学学报（自然科学版）》2022年第1期107-112,共6页Acta Scientiarum Naturalium Universitatis Nankaiensis

摘　　要：为研究道路扬尘PM_(2.5)碳组分的污染特征及其来源,于2018年4月采集锦州市道路扬尘样品,通过再悬浮采样器得到PM_(2.5)滤膜样品,再利用热光碳分析仪测定PM_(2.5)样品中OC(有机碳)和EC(元素碳),并分析其特征及来源.结果表明,PM_(2.5)中ω(TC)为10.52%(支路)-19.05%(主干道),ω(OC)为8.89%(支路)-15.99%(主干道),ω(EC)为1.63%(支路)-4.63%(次干道),ω(OC)明显高于ω(EC);OC/EC比值均大于2,说明锦州市道路扬尘PM_(2.5)可能存在二次污染.Spearman相关分析结果表明,锦州市道路扬尘PM_(2.5)中OC、EC来源相近或相同;聚类分析结果表明,锦州市道路扬尘PM_(2.5)中碳组分主要来源于柴油车与汽油车尾气的排放,以及生物质燃烧与煤炭燃烧的排放.In order to study the pollution characteristics and sources of PM_(2.5)carbon components of road dust,in April 2018,road dust samples were collected in Jinzhou City.PM_(2.5)filter membranes were obtained through resuspension samplers.And then,the thermo-optical carbon analyzer was used to determine the OC(organic carbon)and EC(elemental carbon)in PM_(2.5)for each sample,and its characteristics and sources were analyzed.The results showed thatω(TC)in road dust PM_(2.5)was 10.52%(branch road)-19.05%(main road),ω(OC)was 8.89%(branch road)-15.99%(main road),ω(EC)was 1.63%(branch road)-4.63%(secondary road),ω(OC)was dramatically higher thanω(EC);all the values of OC/EC were greater than 2,indicating there was secondary pollution in road dust PM_(2.5)of Jinzhou;Spearman correlation analysis showed that the sources of OC and EC in road dust PM_(2.5)in Jinzhou were similar or roughly the same.According to the cluster analysis,the carbon component of PM_(2.5)in Jinzhou road dust mainly came from the emissions of diesel vehicles,automobile exhaust,biomass combustion and coal burning.

关 键 词：道路扬尘 PM_(2.5) 碳组分 锦州市 

分 类 号：X5[环境科学与工程—环境工程]