摘要
为研究郑州市PM_（10）和PM_（2.5）中多环芳烃（PAHs）的污染特征、来源及对健康的影响,于2013年4—12月在郑州大学采样点同步采集大气中的PM10和PM_（2.5）.利用气相色谱-质谱联用仪对16种优先控制的PAHs进行定量分析,在此基础上运用Ba P毒性当量法对PAHs进行健康风险评估,并采用比值特征法揭示PAHs的可能来源.结果表明：郑州市大气颗粒物PM_（10）和PM_（2.5）中PAHs的单体质量浓度随季节变化特征明显,基本上都呈现冬季〉秋季〉春季〉夏季的趋势,其中4~6环化合物是PAHs的主要成分.郑州市四季大气颗粒物Ba P质量浓度均超过国家空气质量标准限制,存在潜在健康风险.经过比值特征法分析得出,郑州市大气颗粒物PM_（10）和PM_（2.5）中PAHs主要来自燃煤源、石油化工源、生物质燃烧源和机动车尾气源.
In order to investigate the pollution characteristics, potential sources and health risk of polycy- elic aromatic hydrocarbons （PAHs） in PM10 and PM2.5 in Zhengzhou, a set of PM10 and PM2.5 samples were collected during April 2013 to December 2013 in Zhengzhou University campus, and 16 selected PAHs were analyzed by GC-MS. BaP-TEQ method was applied for health risk assessment and diagnostic ratio was used to identify potential sources of PAHs. The results showed that the concentration of PM10- bound and PM2.5-bound PAHs exhibited a distinct seasonal variation： winter 〉 autumn 〉 spring 〉 sum- mer. 4 - 6 ring compounds were the main composition of total PAHs. BaP concentration of all seasons ex- ceeded the nation limit, indicating a relative high health risk. Diagnostic ratio results showed that PAHs pollution were mainly influenced by coal combustion, vehicle emission, biomass combustion and oil source.
出处
《郑州大学学报（理学版）》
CAS
北大核心
2016年第2期84-89,共6页
Journal of Zhengzhou University:Natural Science Edition
基金
环境保护部公益项目(201409010)
