Characterization and health risk assessment of PM_2.5-bound polycyclic aromatic hydrocarbons in 5 urban cities of Zhejiang Province, China.

ABSTRACT: In 2015, we measured polycyclic aromatic hydrocarbons (PAHs) in atmospheric fine particulate matter (PM_2.5) collected from 5 cities in Zhejiang Province. The mean toxic equivalent quotient (TEQ) values of benzo(a)pyrene (BaP) ranged between 1.2-3.1 ng/m³. The BaP-TEQ displayed seasonal trends, such that winter > spring and autumn > summer. During the winter, the most abundant individual PAHs were 4-6ring PAHs (84.04-91.65%). The median daily intake of atmospheric PAHs ranged between 2.0-7.4 ng/day for all populations, with seasonal trends identical to that of BaP-TEQ. The 95^th incremental lifetime cancer risk (ILCR) values induced by PM_2.5-bound PAHs were far lower than 10^-6 for all populations. The data suggested that the pollution le

SUBMITTER: Mo Z 

PROVIDER: S-EPMC6513845 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature