Pollution Characteristics and Source Apportionment of Atmospheric PAHs in PM2.5: a Case Study in Jiaozuo City
JI Wanwan
TAI Chao
SONG Dangyu
TANG Junting
Abstract：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/ma,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) 30.43ng/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.
Keywords：PM2.5PAHsconcentration characteristicseasonal changesources apportionment
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 92-99 )