郑州市大气PM_(2.5)中正构烷烃污染特征及来源解析  

Characteristics and Source Apportionment of n-Alkanes in PM_(2.5) in Zhengzhou

作　　者：王群[1] 尹沙沙[1] 余飞[1] 姜楠[1] 张瑞芹[1] 

机构地区：[1]郑州大学化学与分子工程学院,河南郑州450001

出　　处：《郑州大学学报（理学版）》2017年第3期104-110,共7页Journal of Zhengzhou University:Natural Science Edition

基　　金：环境保护部公益项目(201409010)

摘　　要：为了解郑州市大气PM_(2.5)中正构烷烃的污染特征及来源,于2014年10月至2015年7月在郑州大学新校区采样点进行大气PM_(2.5)采集.采用气相色谱-质谱联用仪定量分析正构烷烃组分(C8~C40)的质量浓度,利用正构烷烃主峰碳、碳优指数、植物蜡含量以及正定矩阵因子分析(PMF)模型,识别正构烷烃的污染来源和解析污染源贡献率.结果表明:郑州市大气PM_(2.5)中正构烷烃质量浓度季节变化特征明显;秋、冬、春、夏季平均质量浓度分别为272±78、392±203、177±59、89±24 ng/m^3,呈现冬季>秋季>春季>夏季的趋势;郑州市大气PM_(2.5)中正构烷烃主要来自煤炭等化石燃料燃烧和机动车尾气排放.In order to investigate the pollution characteristics and potential sources of n-alkanes in PM2.5 in Zhengzhou,a set of PM2.5 samples were collected during October 2014 to July 2015 in Zhengzhou University campus. n-Alkanes（ C8- C40） were analyzed by GC-MS. Cmax,CPI,wax content and PMF were used to identify potential sources of n-alkanes,and apportion the contributions of each possible source.The results showed that the average concentrations of n-alkanes in PM2.5 were 272 ± 78,392 ± 203,177± 59 and 89 ± 24 ng/m^3 in autumn,winter,spring and summer respectively,with a distinct seasonal variation of winter 〉autumn〉 spring 〉summer. n-Alkanes in PM2.5 in Zhengzhou were mainly from fossil fuel burning including coal combustion and vehicle emissions.

关 键 词：PM2.5 正构烷烃 来源解析 郑州 

分 类 号：X831[环境科学与工程—环境工程]