【摘要】 2008年4月至2009年1月期间,在东北三省(辽宁、吉林、黑龙江)设立30个观测点位,研究了东北城市大气颗粒物中PAHs的浓度水平、分布及来源。结果表明,不同季节14种PAHs总浓度的变化范围是16.3!712.1 ng/m3,呈冬季高、夏季低的季节变化特征;PAHs组成以4～5环化合物为主,3～4环化合物受温度的影响较大,表现出较强的季节波动;8个城市中抚顺和吉林PAHs污染最重,城市不同功能区中以工业区污染较重;燃煤和机动车尾气是区域PAHs的主要来源。更多还原

【Abstract】 Concentrations of PAHs were measured in atmospheric particulates collected at 30 urban sites in the Northeast Region from April 2008 to January 2009,for examination of the composition,distribution and sources of PAHs.The results show that total PAHs concentrations were in the range of 16.3-712.1 ng/m3,with maximum concentrations in winter and minimum concentrations in summer.The PAH profiles were dominated by 4-5 ring compounds,and those 3-4 ring PAHs were more sensitive to temperature change showing stronger seasonal variation.Fushun and Jilin were most polluted among the eight cities,and industrial functional areas had higher PAHs concentrations than other functional areas within a city.Coal combustion and vehicle exhaust were the main emission sources of PAHs in this region.更多还原