中文摘要：

河南省焦作市作为典型的以煤炭为主要能源的中级工业化城市,研究其城市转型过程中大气环境污染现状及污染物来源具有一定的指示意义。通过采集2013-2014年焦作市4个季度82个PM2.5样品,对其中的16种优控的多环芳烃（PAHs）的含量与组成进行了测定与分析,并对多环芳烃进行了源解析。研究结果表明,焦作市大气中PM2.5的浓度范围为51.32~270.12μg/m3,平均为152.16μg/m3;PM2.5中总多环芳烃（TPAHs）的浓度范围是7.6~672.5 ng/m3,平均为119.22 ng/m3,其浓度随季节变化明显,冬季〉秋季〉春季〉夏季;PAHs中Ba P的平均浓度为11.93 ng/m3,BaP当量浓度为30.43 ng/m3,过量致癌风险值（ICR）达到264.74×10^-5;多环芳烃组成以4~6环PAHs为主,占TPAHs总量的90%以上,浓度最高的是BghiP、BbF和IcdP。应用特征比值法和主成分分析法对PAHs进行了源解析,显示燃煤和机动车排放是2个最主要的排放源。

英文摘要：

Jiaozuo, a medium-size industrial city with coal as its main energy source was studied in this paper regarding its air pollution and pollutants sources apportionment in the process of city transformation. During the period of 2013-2014, a total of 82 samples of PM2.5 were collected, in which concentration of 16 prior polycyclic aromatic hydrocarbons were determined, and the sources apportionment was analyzed. The results showed that the concentrations of PM2.5 in atmosphere varied from 51.32 to 270.12 μg/m3, with an average of 152.16 μg/m3. Total PAHs （TPAHs） concentrations in PM2.5 ranged 7.6-672.5 ng/m3, with an average of 119.22 ng/m3, and the PAHs concentrations varied with seasons in the descending order as winter〉autumn〉spring〉summer. As to BaP the average concentration of BaP was 11.93 ng/m3, equivalents （BaPeq） 30.43 ng/m3 and inhalation cancer risk （ICR） 264.74×10^-5. The PAHs were mainly composed of 4-6 ring PAHs, which accounted for more than 90% of the total PAHs, with BghiP, BbF and IcdP were of higher concentrations; sources apportionment using the characteristic ratios and principal component analysis indicated that coal-fired and vehicle emission are the two most important PAHs sources.