莱芜大气污染源排放颗粒物中多环芳烃研究

Study on PAHs in Particulate Matter from Air Pollution Sources in Laiwu City

为了解莱芜市大气污染源排放颗粒物中多环芳烃的浓度及影响因素,采集机动车尾气尘、扬尘、工业燃煤颗粒物、民用燃煤颗粒物等4种样品,分别测定多环芳烃的含量。结果表明,莱芜市大气环境颗粒物中多环芳烃主要来源于机动车尾气和民用燃煤,12种多环芳烃类值分别为(1 536. 48±0. 78)和(299. 83±0. 30)μg/g,机动车尾气尘与扬尘、民用燃煤、工业燃煤多环芳烃均存在显著性差异。不同组分中,苯并(ghi)苝的值最高,为(559. 96±7. 59)μg/g,其次为晕苯,为(445. 36±5. 94)μg/g,城市空气污染呈现煤烟和机动车尾气复合污染的特点。

To understand the pollution degree and influence factors of polycyclic aromatic hydrocarbons （PAHs） in atmospheric par- ticulate matter in Laiwu city, four kinds of particulate samples, which discharged from vehicle exhaust, dust, industrial and civil coal combustion, were collected to determine the content of PAHs. The results showed that polycyclic aromatic hydrocarbons in at- mospheric particulates of Laiwu city mainly came from vehicle exhaust and civil coal combustion, and the values of them were （ 1 536.48 ±0.78 ） anti （299.83 ±0.30） μg/g, respectively. The PAHs in particulates discharged from motor vehicle exhaust showed significant difference with those discharged from dust, industrial and civil coal combustion. Among all the components, the content of benzo （ghi） perylene （BghiP） was the highest, which was （559.96 ±7.59） μg/g, followed by coronene （COR）, which was （445.36 ±5.94） μg/g. Urban air pollution presents the characteristics of combined pollution of soot and motor vehicle exhaust.