摘要
对兰州市春季不同功能区大气降尘有机质中多环芳烃(PAHs)种类进行分析,采用GC/MS法检出了大气降尘中有机质US EPA优控PAHs有11种以上,含量较高的集中于萘(NAP)、荧蒽(FLUA)、菲(PHE)、芘(PYR)、(艹屈)(CHR),占各采样点PAHs总量的70%以上。源解析表明兰州市各功能区大气降尘PAHs来源不仅有较高的燃煤源、交通源(汽车尾气),同时PAHs的组成与分布也在很大程度上受到采样点周围居民居住环境的影响。对照有关的沉积物质量标志水平,兰州市城关区各站点都有PAHs浓度超出相应质量警戒水平。
The polycyclic aromatic hydrocarbons （ PAHs ） in the air dustfall of spring in Lanzhou were detected by GC/MS. The 11 kinds of priority controlled pollutants of US EPA were found in all compounds and the amount of Naphthalene, fluoranthene, phenanthrene, pyrene, and chryene made up over 70% of PAHs in all sampling sites. The results of source analysis showed that the PAHs of dustfall were from the coal combustion and vehicle emissions as wall as burning of resident cooking in function districts of Lanzhou. By Sediment control quality level, the concentrations of PAHs in Chengguan District of Lanzhou exceeded the corresponding warning quality level and the area had high ecological risk.
出处
《环境监测管理与技术》
北大核心
2008年第5期20-24,32,共6页
The Administration and Technique of Environmental Monitoring
基金
国家自然科学基金资助项目(40773064)
