Seasonal variation and health-risk assessment of polycyclic aromatic hydrocarbons in PM2.5 in Jinan

doi:10.7523/j.issn.2095-6134.2014.03.014

Abstract

Abstract:

PM_2.5 samples were collected during the four seasons of 2011 in Jinan using a sampler of medium-flow capacity, and 16 kinds of polycyclic aromatic hydrocarbons (PAHs) bounded to PM_2.5 were analyzed by GC-MS to investigate their seasonal variations and sources. The results indicated that annual total PAHs concentration in PM_2.5 ranged from 1.94 to 92.19 ng·m^-3, showing obvious seasonal variations, and it apparently increased during the haze periods in autumn and winter. Diagnostic ratio (DR) and principal component analysis (PCA) results suggested that the PAHs in PM_2.5 were mainly derived from vehicle emission, coal combustion, and biomass burning. The mean values of BEQ and CR observed during the haze periods were higher than those during the clean periods. During the haze periods in autumn and winter, the mean values of BEQ (5.32 ng·m^-3, 8.65 ng·m^-3) and CR(5.85×10^-6, 8.88×10^-6) were higher than the BEQ values (3.31 ng·m^-3, 3.64×10^-6) and the CR values (2.63 ng·m^-3, 2.89×10^-6) in spring and summer, respectively. BEQ and CR values indicated that haze pollution in autumn and winter would seriously impair human health in Jinan.

Key words: PM_2.5, polycyclic aromatic hydrocarbons (PAHs), haze, source apportionment, health-risk assessment

CLC Number:

YANG Fei, YANG Lingxiao, MENG Chuanping, ZHU Yanhong, YAO Lan, LU Yaling, YUAN Qi, SUI Xiao, WANG Wenxing. Seasonal variation and health-risk assessment of polycyclic aromatic hydrocarbons in PM_2.5 in Jinan[J]. , 2014, 31(3): 389-396.

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Seasonal variation and health-risk assessment of polycyclic aromatic hydrocarbons in PM_2.5 in Jinan

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