张家界市大气PM_(2.5)碳组分污染特征及来源分析  

Characteristics and sources of carbonaceous species in atmospheric PM_(2.5) in Zhangjiajie

作　　者：王幸 张青梅[1] 刘湛[1] 罗达通 尤翔宇[1] 周理程[1] 齐新征[1] WANG Xing;ZHANG Qing-mei;LIU Zhan;LUO Da-tong;YOU Xiang-yu;ZHOU Li-cheng;QI Xin-zheng(Hunan Provincial Engineering Technology Center of Air Compound Pollution Prevention,Hunan Research Academy of Environmental Protection,Changsha 410004,China)

机构地区：[1]湖南省环境保护科学研究院,湖南省大气复合污染防治工程技术中心,湖南长沙410004

出　　处：《湘潭大学学报（自然科学版）》2021年第6期117-126,共10页Journal of Xiangtan University(Natural Science Edition)

基　　金：湖南省重点领域研发计划项目(2019SK2071)。

摘　　要：为研究张家界市PM_(2.5)中碳组分的污染特征及来源,于2017年11月至2018年7月在4个季度典型时段进行了大气PM_(2.5)样品采集,综合分析了碳组分浓度水平和组成成分,并识别了其来源.结果表明,观测期间张家界市城区PM_(2.5)质量浓度平均值为(45.60±25.48)μg/m^(3),OC、EC分别占PM_(2.5)总质量的16.73%、4.55%;OC/EC比值及OC、EC相关性分析表明:张家界市大气存在较为明显的二次有机污染,春、夏季尤为突出.根据OC/EC最小比值法估算得到区域SOC年均值为2.92μg/m^(3),占OC的38.42%.结合8类碳组分组成特征及主成分分析结果发现,张家界市PM_(2.5)中碳组分受机动车、道路扬尘、燃煤的污染影响突出.In order to study the characteristics and sources of carbonaceous species in PM_(2.5) in Zhangjiajie City,PM_(2.5) samples were collected in Zhangjiajie City during typical period of four seasons from November 2017 to July 2018.The concentration and composition of carbon components were comprehensively analyzed,and the source was identified.Results showed that the PM_(2.5) mass concentration in the urban area of Zhangjiajie during the observation period was(45.60±25.48)μg/m^(3),with OC and EC accounting for 16.73%and 4.55%,respectively.The ratio and correlation analysis of OC and EC showed that there were a significant secondary organic pollution in Zhangjiajie,especially in spring and summer.According to the OC/EC minimum ratio method,the regional average annual SOC was 2.92μg/m^(3),which accounts for 38.42%of the OC.The composition characteristics and principal component analysis results of the eight types of carbon components showed that the carbon components in PM_(2.5) in Zhangjiajie were significantly affected by vehicle exhaust,road dust,and coal combustion.

关 键 词：PM_(2.5) 碳组分 污染特征 来源 

分 类 号：X83[环境科学与工程—环境工程]